The installation of plumbing equipment in a home, business or municipal institution is usually carried out in accordance with all rules of maintenance and operation. Most consumers purchase plumbing fixtures from reliable manufacturers, but some factors can damage any fixture. For example, changes in water pressure in the water supply system often cause equipment breakdowns. To solve this problem, it is worth installing a water pressure regulator.
What is a water pressure regulator, what is the principle of its operation
A regulator, or water pressure reducer (WPR) is a special regulating device for plumbing that maintains normal water pressure. Drastic changes pressure can not only ruin expensive equipment, but also damage repairs in an apartment or house, which leads to new expenses. The gearbox mechanism is capable of reducing the fluid supply force to normal level and prevent water hammer.
There are two types of RDV design, differing in the direction of regulation:
- from oneself - works in a pipeline installed on a plumbing outlet;
- to yourself - works on the main line towards the plumbing fixtures.
The principle of operation of both types is to change the cross-section of the valve. At a stable pressure that does not exceed the norm, the working valve is kept open. Minor surges cause the valve to automatically close, which reduces the pressure and reduces the risk of breakage of drainage pipes.
- brass or steel body (1) with a lid (2) and a plug (3);
- adjusting bolt for adjusting the mechanism (4);
- nut for fixing the bolt (5);
- piston rod (6, 13) with cylinder (8);
- mechanical springs (7);
- membrane (9) with distribution ring (10) or piston in mechanical model;
- a working valve consisting of a screw (11) and a gasket (12);
- seal (14) and damper chamber for the plug (15).
Also, gearboxes, depending on the manufacturer and purpose, are equipped with additional elements - air valves, filter, pressure gauge, ball valve.
Hot and cold water regulators are static and dynamic. The former maintain a set pressure level on a constant basis, the latter are designed for continuous water supply and flow. Gearboxes are used in domestic and industrial municipal water supply, at pumping stations and in fire services, as well as at water filling stations and land reclamation stations.
What types of regulators are there in the water supply system?
Modern stores offer the purchase of water pressure reducers of any type and purpose. There are several classifications of types of RDV.
Regulators that differ internal device and operating principle:
- piston - mechanical devices, in demand due to their low price and ease of use;
- membrane - more powerful and expensive devices, powered by springs and a diaphragm.
Types of regulators according to control method:
- electronic - equipped with an electric sensor that scans the pressure to activate the pump;
- automatic - equipped with a block with springs and nuts that are sensitive to pressure changes.
Piston reducer it operates from springs, a piston and a valve, which, depending on the pressure, control the operation of the spool. The advantages of this design are affordable cost, ease of installation and a simple, reliable mechanism. Among the disadvantages, it is worth noting the high sensitivity to dirt and friction of parts.
Diaphragm reducer characterized by increased throughput, excellent performance and long service life without breakdowns. The device operates from a spring-loaded diaphragm, which is located in a special sealed compartment. Such devices have a high price, but it is justified by powerful technical characteristics.
There are also flow regulators, which are rarely used but have good properties. They are missing movable mechanism- the internal structure consists of numerous channels and compartments. Water entering such a labyrinth slows down the speed of movement, which reduces its pressure and protects the plumbing from water hammer.
Technical characteristics of popular RDV models
| Regulator type | Connection Diameter (inch) | Pressure adjustment limits (Bar) | Throughput (m³/hour) | Nominal water flow (m³/) |
| With filter and pressure gauge | 1/2 | 2-5 | 1,40 | 0,95-1,27 |
| With filter and pressure gauge | 1/4 | 2-5 | 2,44 | 1,70-2,27 |
| Flow limiter | 1/2 | 2-4 | 1,98 | 0,95-1,27 |
| Membrane | 1/2 | 0,5-7 | 1,85 | 0,95-1,27 |
| Membrane | 3/4 | 0,5-7 | 2,60 | 1,70-2,27 |
| Piston | 1/2 | 1-4,5 | 1,60 | 0,95-1,27 |
| Piston | 3/4 | 1-4,5 | 2,61 | 1,70-2,27 |
| Piston | 1 | 1-4,5 | 3,34 | 2,65-3,53 |
| Piston | 1 ¼ | 1-4,5 | 4,89 | 4,34-5,79 |
| Piston | 1 ½ | 1-4,5 | 7,85 | 6,78-9,00 |
| Piston | 2 | 1-4,5 | 10,8 | 10,6-14,1 |
| Piston with pressure gauge | 1/2 | 0,5-5,5 | 1,6 | 0,95-1,27 |
Installation of the RDV regulator
It is recommended to trust the installation of the water pressure reducer to specialists and experienced craftsmen. This is the only way to guarantee reliable, long-lasting operation of the device without unscheduled repairs. If there practical experience in installing plumbing or measuring equipment on pipes, you can install the RDV with your own hands.
The procedure for installing the gearbox in an apartment:
- Turn off and shut off the water throughout the riser. If necessary, notify your neighbors about the temporary shutdown.
- Place an inlet valve on the pipe between the ball stop valve and the meter.
- Attach a large particle filtration system behind the meter.
- Install the control device on a horizontal pipe.
- Seal all joints of parts using sealant.
- Adjust the position of the pressure gauge so that the dial is clearly visible.
- Connect the installed RDV to the ball valve, check the smooth operation of the device.
Installation of RDV in private country house differs slightly from apartment. To prevent water hammer and breakdown of plumbing equipment in the house, you should install the regulator immediately behind the meter, and then install check valve, filter and faucet.
To choose reliable device To adjust the water pressure, you need to know some parameters that should be taken into account:
- Bandwidth. For household use 0.1-0.15 m³/hour is recommended, for commercial - 0.2-0.3 m³/hour, for industrial - over 0.3 m³/hour.
- Allowable pressure loss. With low water consumption, 1-2.5 Bar is considered the norm, with average - 2-5 Bar, with high water consumption - 4-7 Bar.
- Bore diameter. Measured in inches and depends on the purpose. For residential buildings, the diameter should be ½-¼ inches, for industrial buildings - from ¾ to 2 inches.
- Connection method. There are flange and threaded (coupling) connections of parts, which differ in the type of fastening and cost.
If you have a choice whether to install a water pressure regulator or not, the answer is clear - install it. The device fully justifies its cost, and consumers note many advantages of installing the RDV:
- reliable and durable resistance of plumbing fixtures to hydraulic loads and pressure changes;
- long-term preservation of plumbing equipment in a house, apartment or enterprise;
- financial savings due to reduced water use;
- absence of noise in the pipeline and during gearbox operation;
- stable outlet pressure regardless of the input level.
Review of the best gearbox manufacturers
On Russian market There is a huge range of water regulating devices from various manufacturing companies. Over many years of sales, some of them have proven their authority and competence in the manufacture of RDV.
- VALTEC. An Italian company with an official representative office in Russia. Production processes are fully automated, eliminating the human factor. We have our own laboratory to test product functionality.
- HONEYWELL. A concern from Germany that appeared in Russia 45 years ago. Gained worldwide fame thanks to modern developments in the field engineering communications, energy resources, oil refining and space industries;
- ICMA. The company's main office and plant are located in Italy, from where products for water supply, heating, ventilation, and air conditioning are supplied to Russian cities. Management pays Special attention raw materials and materials that customers value.
- AQUASFERA. Famous Russian company specializes in the manufacture and sale of control, shut-off and safety valves, and also supplies valves, fittings, filters and pipes to most cities in Russia.
- WATTS. A company from the USA with many branches in Europe, which is focused on the production of devices for control, cleaning, supply and consumption water resources. The brand's products are intended for both the residential and industrial sectors.
It is also worth noting such leading global brands as FADO, DANFOSS, GIACOMINI, EDD, ALTAIS. Engineering and communication products from VALTEC are especially in demand, as they are characterized by stable technical characteristics, long service life and affordable price. You can buy VALTEC water pressure regulators from us, official representative trademark.
Water supply to a home is a complex hydraulic structure, the organization of which must be carried out in accordance with all the rules.
Accidents in the system can occur both due to errors in the installation of pipes or plumbing fixtures, and due to violation of operating rules. The latter also includes such a common phenomenon as pressure surges in the pipeline, to combat which special devices are used - pressure regulators.
Purpose of pressure regulators
The devices are capable of simultaneously performing a number of important functions. The first of them is to prevent increased pressure. Almost all household plumbing fixtures are capable of operating at temperatures up to 3 atm. Exceeding this parameter is fraught with overloads for the water supply system of the house. As a result, the operating life of functional units on washing and washing machines is noticeably reduced. dishwashers, the reliability of connecting adapters and gaskets decreases.
Pressure regulators prevent water hammer. It's about about sudden changes in water pressure that occur due to malfunctions of pumping equipment or improper use of valves. Water hammer can lead to very disastrous consequences, including pipeline breaks and breakdowns of boiler units. Sometimes the pressure surges are so large that the boiler explodes.
Another useful function is economical water consumption. By adjusting water pressure, you can significantly reduce its consumption. For example, if you reduce the pressure from 6 to 3 atm, savings can reach 20-25% (when the tap is opened, a smaller volume jet will be released).
Hydraulic regulators help reduce noise when using mixers and taps. The reason for the annoying hum of the fittings lies in the increased pressure, due to which the water pressure after opening the valve acquires a limiting force. Thanks to the regulator, the water pressure becomes stable and decreases to optimal values.
In the event of a pipeline rupture, water losses will be reduced, since the device responds to a drop in pressure by reducing water supply. Basically, regulators (reducers) are equipped with water supply systems of private houses, where they, paired with a hydraulic accumulator, are connected to a circulation pump.
Device Features
Water pressure regulators are presented in the plumbing equipment market in several varieties. Depending on the location of installation, devices are divided into two groups:
- "to yourself." The flow voltage is stabilized in front of the gearbox;
- "after myself". Water pressure stabilizes beyond the installation point.
Regardless of the operating principle, any pressure switch consists of the following structural elements:
- valve (piston). Serves as the core of the device;
- springs (membranes);
- housings. Can be cast iron, brass or steel.
In addition to the standard set of parts, some models are additionally equipped with a pressure gauge, a coarse filter, air valve and a ball valve.
Based on capacity, regulators are divided into household (0.5-3 m3), commercial (3-15 m3) and industrial (over 15 m3).
Types of regulators
According to the principle of operation, RVDs can be piston, membrane, flow, automatic and electronic.
Piston
Water pressure valves are the simplest in design (they are also called mechanical). Pressure adjustment is carried out by a compact spring-loaded piston by reducing or increasing the passage channel. To adjust the outgoing water pressure, the device has a special valve: by rotating it, you can loosen or compress the spring.
TO weaknesses piston regulators attribute their sensitivity to the presence of debris in the water: piston clogging is main reason breakdowns. To prevent such phenomena, a special filter is usually included in the gearbox kit. Another drawback is the large number of moving mechanical components, which affects the reliability of the gearbox. The piston device is capable of regulating pressure in the 1-5 atm mode.
Membrane
Very reliable and unpretentious devices that make it possible to adjust the water pressure over a wide range (0.5-3 m3/hour). For living conditions this is a very decent indicator.
The core of the device is a spring-loaded membrane: to avoid clogging, a self-contained sealed chamber is used to install it. The impact from the compressing or expanding spring is transferred to a small valve, which is responsible for the size of the cross-section of the output channel. The cost of membrane restrictors is quite high. Due to the difficulty of replacement, this procedure is usually performed by experienced plumbers.
Flow-through
A special feature of this model of water pressure regulators is that it completely lacks moving elements. This has a beneficial effect on the reliability and service life of the devices.
The pressure is reduced due to the intricacy of narrow channels. When passing numerous turns, the water is divided into separate branches, at the end merging again into one, but not so fast. IN household use flow reducers can be found in irrigation systems. The disadvantage of the device is the need for an additional regulator at the output.
Automatic
A small unit consisting of a membrane and a pair of springs. To change the compression force, special nuts are used. When the inlet water has low pressure, this leads to a weakening of the membrane. Increased pressure in the pipe provokes an increase in compression.
Under the influence of the spring, the contacts on the automatic pressure reducer either open or close again. This in turn turns on and off circulation pump compulsory system water supply The design of automatic high-pressure pumps basically duplicates membrane devices, differing only in the presence of two correction screws for setting the operating pressure range.
Electronic
A special mechanism monitors the water pressure in the pipe, for which a motion sensor is used. After processing the received data, a decision is made to turn on the pumping station. The electronic regulator will block the pump from turning on if the pipeline is not filled with water. The structure includes the main body, sensors, electronic circuit boards, a connecting sleeve (thanks to it the supply wire is turned on) and threaded pipes for connecting to the system.
The stabilizer design has a convenient display to display the characteristics of the water flow. Mechanical regulators are sometimes unable to effectively protect the system from dry running, which is why it is necessary to constantly monitor it for the presence of water. In contrast, electronic models with a controller are able to constantly monitor water filling. Gearboxes of this type They operate almost silently, reliably protecting all components from hydraulic shocks.
Installation features
As the standards for plumbing and sewer systems, the water pressure regulator must be installed at the inlet between the shut-off valve and the meter. In this case it is guaranteed reliable protection all hydraulic devices, including metering and filtration devices.
Installation rules in the apartment
Most often, a water pressure reducer in apartments is needed as a safety net - to reduce the pressure in the pipe.
Note! The optimal installation point is on the riser, immediately behind the meter and filtration unit.
The first step is to assemble the device with the obligatory installation of plugs on the side holes. In the future, pressure gauges are mounted on these pipes. It is best to place the water pipe horizontally: the RVD in such a scheme has a shut-off valve before and after itself. When installed in apartments, the gearbox must be positioned strictly vertically (horizontal or inclined installation is strictly prohibited).
Installing an apartment relay is in many ways similar to a similar procedure with a hot and cold water metering device or a coarse filter. To indicate the direction of fluid movement, the product body is marked with an index (the seat for the pressure gauge is located in the upper part of the body). Getting started installation work, shut off the water supply, warning the neighbors in advance (if the installation is carried out on a riser). Work for polypropylene pipes will require the use of special adapters (as a rule, they are included with the product).
In some cases, it would be useful to include an inlet shut-off valve equipped with a strainer in the regulator trim. Required condition is the presence on the water pressure regulator ball valve. All connecting joints must be well sealed to avoid leaks, for which tow or FUM tape is used. Having installed the seal, tighten the connections gas wrench. It is important not to overdo it, given the fact that in most cases brass fastening nuts are used, which have average strength. Installation work is quite complex, therefore, in the absence of proper experience, professional plumbers are invited to perform it.
Specifics of installing high pressure hoses in a private house
A water pressure regulator in a private house has the same functional load as in an apartment. The only difference is the presence of a pump in the system that maintains the required pressure. The high-pressure pump in combination with pumping equipment is installed so that the pressure gauge faces upward. The installation point of the device is the place where the home system connects to the main pipe or supply from the well (after the water meter). For ease of installation, some manufacturers sell regulators complete with a pump.
When organizing the regulator wiring, it is important not to forget about the coarse filter (if it is not present in the circuit initially). The filter installation point is the entrance to the house pipe. On both sides (as in apartments) the RVD is equipped with shut-off valves. To stabilize the flow force, after tying the device, a straight line is installed (the length of this section is 5 working diameters). All work must be performed by a person with appropriate skills.
Setup and maintenance
Special standards for the operation of domestic water supply systems water pressure at the output it is recommended within 2-3.5 kg/cm2. This mode can only be achieved by adjusting the water pressure reducer. The speed of action of different RVD models differs. System leakage provokes a decrease in pressure force by approximately 1.5 atm ( exact indicator depends on the specifics of the circuit). After a few seconds, the pressure increases to below average. The ideal parameter of the output value should be inferior to the input value by at least 1.5 kg/cm2, otherwise this will lead to a noticeable slowdown in the speed of fluid movement through the pipes.
It is important to take these standards into account when setting up water pressure reducers. To determine that the gearbox is not working correctly, paired pressure gauges or a control fluid intake in front of the pressure regulator will help. It is possible to adjust the RVD only if the system is in good working order and has the required fluid pressure. Having created such conditions, as the adjusting screws rotate, you can easily determine all the changes in indicators that occur (this will be displayed on the pressure gauge). Without measuring instrument Such manipulations are not recommended, as this may lead to a violation of the factory settings.
During the operation of the high pressure hose, it is necessary to monitor the pressure in the system. If the output parameters of the device cannot be adjusted, the membrane is most likely damaged. Sometimes water begins to seep through the joints on the body. Any signs of breakdown serve as a signal to dismantle and disassemble the device. Most often, the membrane is injured by a rusty spring or rod. These components, along with seals, can be found in repair kits that can be purchased at a plumbing store.
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flow or flow regulator- — Topics oil and gas industry EN rate of flow controller … Technical Translator's Guide
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Electronic fluid regulator used to maintain the refrigerant level in a shell-and-tube evaporator (Fig. 1, a), evaporator air cooling(Fig. 1, b) or in an intermediate vessel of a two-stage refrigeration unit. The regulator has a float device (3), which is installed on the liquid bypass pipeline connected to the liquid separator (2) of the evaporator (1). Liquid refrigerant enters through the pipeline from the condenser, passes through the solenoid valve (5), manual throttling valve (6) and is directed to the evaporator (1) through the separator (2). When valve (5) is open, valve (6) regulates the flow of liquid refrigerant into the evaporator. As a result of the boiling of the refrigerant, wet steam is formed, which is directed through the separator (2) through the suction pipe (11) to the compressor.
If the compressor is not running, the solenoid valve (5) closes the liquid line and the magnetic valve (7) acts on the valve (9), which closes the suction line (11). A constant pressure control valve (8) is installed between valves (7) and (9). The valve (5) is electrically controlled through a device (3) and a converter (4), connected by an electrical wire (10) to the compressor.
The device of the float device of the liquid regulator shown in Figure 2.
Rice. 1 - Scheme of electronic control of liquid in a shell-and-tube evaporator (a) and an air-cooled evaporator (b)
When a solenoid valve is used as a pilot device (Fig. 3), it receives pulses from the refrigerated room thermostat or pressure switch. While the valve is inactive, the actuator remains closed, but when the solenoid is turned on, vapors from the evaporator will begin to pass through the filter (1) and channel (11) into the mechanism cylinder above the servo piston. Under vapor pressure, the piston will lower and open the actuator, which remains open even if vapor from the cylinder exits continuously through the equalizing channel, since the pressure drop through this channel is greater than through the passage hole of the solenoid valve.
When the current is turned off, the solenoid valve closes, the pressure in the mechanism cylinder decreases until it closes.
Rice. 2 - Float device: 1 - waterproof metal body; 2 - relay; 3 - magnetic amplifier; 4 - transformer; 5 - grounding terminal; 6 - connecting clamps; 7 - cable entry fitting; 8 - control coil; 9 - float body; 10 - float with a control tube; 11 - connecting flanges
Rice. 3 - Pilot solenoid valve: 1 - filter; 2 - refrigerant inlet channel; 3 - unloading hole; 4 - valve body; 5 - spindle; 6 - solenoid housing; 7 - anchor; 8 - coil; 9 - terminal; 10 - valve; 11 - valve seat channel; 12 - refrigerant outlet channel; 13 - manual opening spindle; 14 - cap
During reconstruction or installation new system water supply, it is usually planned to place all water consumption devices and the necessary structural elements. Most of these elements of the water supply system have fairly strict requirements for operating conditions, the violation of which leads to a decrease in service life. These requirements include the maximum permissible pressure in pipelines. With a sharp increase in pressure in the system or water hammer, water consumption devices may fail. To eliminate the occurrence of such problems, it is necessary to install a water pressure regulator (WPR) in the water supply system. This device will be discussed in today’s review.
Read in the article:
What is a water pressure regulator in the water supply system of an apartment and house?
The main function performed by water pressure limiters is to stabilize the pressure in the system and maintain it at a given level, protecting the main line and consumption devices from high loads and water hammer. The RDV is a safety mechanism in a metal case with an inlet and outlet threaded connection. The device can be equipped with a pressure gauge and an adjusting screw for adjusting the water pressure.
In private households, to maintain a constant pressure in the water supply system, two mandatory devices are required - and a hydraulic accumulator. These elements are connected to the pump through a line, and the water pressure switch in the water supply system is located between and the pump.
Devices are structurally divided into two types:
- correcting the force of liquid pressure in the pipeline up to the Russian Far East (plumbers call such a regulator “up to themselves”);
- water pressure stabilizers that normalize the pressure in the line mounted behind the device (“after itself”).
The first type of regulator is capable of automatically maintaining the required water pressure in the main by changing the flow area of the valve, which is kept open until the specified pressure is established in the water supply system. This type of gearbox is mainly installed on pump units, heating systems, etc.
To stabilize the water pressure in household pipelines, a “after itself” type regulator is used. The device stabilizes the pressure in the water supply system in the same way as the first type RDV, but it works completely differently.
You can familiarize yourself with the principle of operation of the relay for stabilizing water pressure by watching the video:
The stabilization device is characterized by several features:
- method of connection to water supply. In the water supply systems of private houses and apartments, an RDV is installed with a threaded (coupling) connection method, which is optimal for pipes with a diameter of 1-2″. For larger diameters, gearboxes with a flange type connection are used;
- adjustment range;
- maximum water pressure level at the outlet;
- the maximum temperature range for cold water supply is up to +40˚C, and hot water supply up to +70˚C.
A household regulator has a capacity of no more than 3 m 3 /h. For water pipelines industrial purposes devices with higher performance are required.
Design and principle of operation of the RDV
Before considering how a water pressure reducer works, you should know the scope of application of this device. RDV are equipped with:
- technological and communal water supply lines;
- fire-fighting water supply and fire extinguishing systems;
- water intake stations;
- pumping stations of main pipelines;
- reclamation and irrigation systems.
Despite the fact that the principles of operation of the differential pressure regulator may differ, depending on the type of device, almost all RDVs have the same design:
- main working element (valve, piston);
- spring and membrane;
- mechanical or electronic control;
- the throughput of household devices is 0.5-3 m 3, commercial – 3-15 m 3, industrial – >15 m 3;
- body made of cast iron, brass, steel with chrome or nickel plated.
The principle of operation of a water pressure reducer is similar to the operation of a valve tap: a piston with a rod in its seat creates a given clearance, thereby creating a liquid pressure of the required force. With a stationary piston at the outlet, the pressure changes in proportion to the flow force at the inlet, and in the RDV, the position of the valve depends on the ratio of the current pressure and the stiffness of the spring. The regulator is adjusted using a “pilot circuit”: when the pressure of the working medium increases, the water flow is redirected to the membrane, which lowers the rod with the piston, thereby reducing the flow area.
In addition to the standard adjustment mechanism, additional devices can be installed in some modern RDV models:
- pressure gauge;
- coarse filter;
- air blast valve;
- ball valve
Video: operating principle of the gearbox
Types of water pressure reducers installed in water supply systems
The modern market offers a wide variety of models of water pressure regulators for domestic and industrial use. Reducers that reduce water pressure are divided into two types - piston and membrane.
Mechanical water valves
Mechanical or piston water pressure reducers are the most common type of regulator. The popularity is due to the lowest cost among similar devices. The pressure in the water supply system is adjusted using a spring-loaded piston, which changes the flow area of the pipe. Water pressure regulators have a range of setting the water pressure at the outlet - 1-5 atm.
The main disadvantage it has mechanical regulator water pressure is the presence of moving parts that are subject to wear, which leads to equipment failure. In addition, a piston reducer for water supply is highly sensitive to various mechanical impurities in water that are present in domestic and industrial lines.
Expert opinion
Ask a specialist“It is for this reason that piston gearboxes are equipped with a coarse filter. The pressure force at the inlet of the piston water pressure regulator is 25 bar.”
Diaphragm water pressure reducers
When deciding for yourself which is better to buy pressure reducers - piston or membrane ones, you must first understand what devices of the second type are. Regulators of this type perform their function through a membrane with a spring enclosed in a sealed chamber. When the pressure in the water supply system increases, the spring is compressed and acts on the valve, which reduces the water flow in the pipes, and when the inlet decreases, the opposite happens.
The membrane water pressure regulator is a fairly reliable device, unpretentious in operation with a large range of pressure adjustment in water supply lines. These devices are also very expensive. However, membrane gearboxes have such disadvantages as: a large number of moving elements and the complexity of the replacement procedure.
There are also regulators and flow type, distinctive feature which is the absence of moving elements, which in turn has a positive effect on the reliability and durability of gearboxes. The pressure equalization occurs due to the loss of water flow velocity due to the passage of the internal labyrinth of the device. In everyday life, such regulators are used in almost all types of irrigation systems. The disadvantage of such devices is the need to include an additional gearbox at the output.
RDVs are also divided according to the type of control into electronic and automatic.
Automatic RDV in the water supply system
The modern market offers big choice automatic water pressure regulators installed in water supply systems. The water pressure in the pipeline is adjusted using a special relay. Automatic gearbox is quite compact unit with a membrane and two springs, the compression and straightening force of which is regulated by means of nuts. The membrane reacts to the inlet water pressure, and when weak pressure the spring weakens, and at maximum, the compression becomes stronger. The effect exerted on the springs leads to the opening (closing) of the contacts of the automatic water pressure regulator for pumps, starting or stopping the pump.
The relay helps stabilize the pressure in the water supply network and automate pump control.
Electronic pressure regulators
A special device monitors the current pressure of the working medium by collecting sensor data and water movement, after which it activates (if necessary) the pump. Thanks to the electronic water pressure controller, pumping equipment is protected from being turned on in the absence of liquid in the water main.
Electronic regulators water pressure pumps consist of a main body, sensors, an electronic board, a bushing for connecting the electrical cable and threaded pipes for connecting to the water supply. The device is characterized by silent operation. An electronic water pressure sensor in the water supply system also helps protect line equipment from possible water hammer.
Expert opinion
VK design engineer (water supply and sewerage) LLC "ASP North-West"
Ask a specialist“Electronic devices are installed up to the first liquid intake mark. Before starting the gearbox, the pump tank must be filled with water.”
How to install a water pressure reducer
The requirements for water supply and sewerage indicate that the installation of water pressure regulators must be carried out at the inlet immediately after shut-off valves to metering devices. With this arrangement, the gearbox will protect all hydraulic equipment, including the water meter and filter units.
How to properly place water pressure regulators in an apartment
To stabilize the water pressure and avoid interruptions in domestic water supply systems, it is necessary to install a special reducer. An apartment pressure regulator will also eliminate possible breakdowns equipment due to water hammer. Most apartment owners have already felt the benefits of installing such control devices.
Since in apartments a water pressure reducer is installed to reduce the pressure in the main, it should be mounted to the riser behind the metering device and. It is advisable that water pipe was in a horizontal position, and the regulator itself was located between two shut-off valves. Water reducers in apartments must be installed in a strictly vertical position (horizontal or inclined installation is unacceptable).
Installing a water meter is practically no different from installing a water meter or mesh filter. As a rule, the direction of flow of the working medium is indicated by an arrow on the device body, and the pressure gauge or socket for connecting it is always located on top of the gearbox.
Before installing the regulator, you must first turn off the water (it is advisable to warn your neighbors if it affects the main riser pipe). If necessary, an inlet shut-off valve is installed to which the filter will be connected mechanical cleaning. It is imperative to install a ball valve on the RDV.
All connections must be carefully sealed. To avoid damage to the regulator, it is advisable to carry out sealing work using tow to reduce the likelihood of leaks.
You can install water reducers in an apartment yourself (if you have experience), but better installation entrust to professionals.
On a note! The use of the RDV protects household hydraulic devices and the water supply system from water hammer, breakdowns and emergency situations.
Correct installation of the RDV in a private household
RDV devices for a private home perform the same function as for residential mains, with the only difference being that a pump is present in the water supply systems of cottages. Water pressure regulators are mounted with the pressure gauge upward at the point where the home network is connected to the pipeline (preferably behind the water meter). In addition, it is necessary to provide an insertion into the system of a coarse filter (if this has not been done previously), which is installed at the entrance to the home highway. Shut-off valves are installed in front of the water pressure regulators on the pumps and behind them.
After the device to stabilize the liquid pressure, a straight section of the pipeline should be made with a length of at least five working diameters. If you have minimal plumbing skills, you can install a water pressure regulator at the entrance to the house yourself, but to guarantee quality, it is better to entrust the installation of the device to an experienced specialist.
When deciding for yourself whether to install the regulator before or after the meter, it’s worth watching this video
Adjusting water pressure reducers in water supply systems
The most optimal pressure force at the outlet is considered to be 2-3.5 kg/cm 2 . It is difficult to achieve such a value, so you should figure out how to adjust the water pressure reducer.
U various types and gearbox models have different speeds. In the event of a leak, the pressure decreases by 1.5-1.2 atm. depending on the current installation. After a few seconds, the pressure increases to a level below static. The ideal outlet pressure should be at least 1.5 kg/cm 2 less than the input pressure, otherwise the movement of water in the pipeline will slow down greatly. This must be taken into account when adjusting the water pressure reducers in the apartment.
Poor performance of the gearbox can only be noticed if there are paired pressure gauges or a water intake installed upstream of the pressure regulator. Maintenance of the RDV consists of flushing the built-in filter and flushing the mechanism. If this does not produce results, then the issue is a mechanical failure or wear of parts. You can visually determine the condition of the regulator by removing the rod.
Adjustment of water pressure regulators must be performed while the system is running and there is pressure in it. Under these conditions, a change in parameters is immediately noticeable on the pressure gauge after unscrewing or tightening the adjusting screw. You should not make adjustments without a pressure gauge, since you can reset the factory settings of the gearbox.
You can familiarize yourself with the adjustment of the RDV by watching the video:
Overview of water pressure control reducers in water supply systems
Maintenance normal pressure in a water supply system it is very important for the normal operation of hydraulic equipment. Foreign and domestic producers plumbing equipment offer a large selection of equipment for adjusting the pressure of the working medium in water supply systems. Before you buy a water pressure regulator, you should first familiarize yourself with the most popular models and manufacturers.
Popular models of Honeywell water pressure reducers
Produced by the company Honeywell Water pressure regulators are designed to protect water supply networks from a sudden increase in pressure in the system. At the output of the reducer, the pressure is always at the set value, which reduces the cost of cold and hot water, and the device itself operates quite silently. Honeywell products are popular in European, American and Asian markets and meet all international standards quality.
| Model/Image | Description | Average cost, rub. |
|---|---|---|
Honeywell DDS 76 1/2" | The DDS 76 model is designed to monitor the filter cleaning process using a backwash drive (Z11S-A, Z11AS, Z74A-A). The relay compares the values before and after the filter and when the pressure is greater than the specified one, automatic switching on backwash drive. The regulator body is made of high quality plastic. | 25100 |
Honeywell D06F-1/2" B | The hot water regulator eliminates the creation of excess pressure in the domestic water supply system and maintains a stable pressure at a given value. The gearbox is adjusted by turning the adjustment knob, and the device itself has an adjustment scale. The model is equipped with a pipe for installing a pressure gauge and can be used as a working medium compressed air, nitrogen or water. If necessary, the device can easily be transformed into a combined backwash filter. | 3200 |
Honeywell D06F-1/2" A | This gearbox model is standard version allows you to reduce the pressure of nitrogen, water and other non-aggressive working media flowing in pipelines and is used in domestic and industrial areas. Installing the D06F-1/2A regulator will make it possible to protect the pipeline and the equipment connected to it. This device allows you to maintain a given outlet pressure, regardless of surges in the input pressure of the working media. | 2950 |
Honeywell D06F-3/4" B | Regulator model D06F-3/4 is designed to work with domestic and industrial hot water pipelines. The reducer allows you to increase the durability of equipment included in the water supply system by maintaining a constant pressure force specified by the consumer. The gearbox consists of a brass housing, a liner, a cylinder, a scale adjusting spring, an adjustment knob and a fine filter located at the bottom. | 4500 |
Honeywell D06F-3/4" A | Honeywell D06F-3/4A allows you to protect the water supply system from excess pressure, which can lead to emergency situations and breakdowns of connected equipment. The regulator is equipped with a connection for a pressure gauge, an adjustment scale and an adjustment knob. Used as a working environment cold water, nitrogen or compressed air. | 4116 |
Honeywell D04FS-3/4" A | Honeywell D04FS-3/4" A reducers protect water supply system equipment from excess pressure, avoid breakdowns due to water hammer and reduce water consumption. The reducer valve maintains a given pressure force of the working medium at the outlet even with surges at the inlet, which minimizes noise. | 1880 |
| Honeywell D04FS-1/2" A | Model D04FS-1/2" A is the most affordable and simplest in the Honeywell line. The simplicity of the regulator, however, does not interfere with constantly maintaining the set output pressure value. The design of the gearbox allows for the installation of a pressure gauge, and the adjustment spring does not come into contact with water. | 2090 |
Honeywell D 06F | The Honeywell D 06F regulator model provides uninterrupted and comprehensive protection of the water supply system from pressure surges. The device is suitable for both industrial and production installations. The pressure force of the working medium in the pipeline is adjusted using a special knob with a scale of values. | 4800 |
Honeywell D06F-1/2
Honeywell D04FS-1/2 A
Honeywell offers consumers only high-quality and highly efficient water pressure regulators at prices that are completely justified.
Model range of Valtec water pressure regulators
| Model/Image | Description | Average cost, rub. |
|---|---|---|
Gearbox with filter and pressure gauge Valtec VT.082 1/2" | Pressure regulator Valtek VT.082. 1/2" is designed to reduce the flow force of cold and hot media at inlets in domestic water supply networks. Pressure adjustment is carried out according to the "after itself" principle. Model VT.082. 1/2" is equipped with a pressure gauge for more precise adjustment of the outlet pressure and allows control water pressure. Adjusting the force of water flow at the outlet is easily done using a screwdriver, and each element of the gearbox can be quickly replaced or repaired. It is recommended to install the regulator immediately after the inlet shut-off valves in front of the water meter. | 1043 |
Diaphragm reducer Valtec VT.085 1/2" | The membrane regulator allows you to maintain a given level of pressure of liquids, gases and other non-aggressive media in heating systems, water supply, process pipelines and pre-heating pipelines. The stability of the given pressure in the system is maintained regardless of sudden surges in the main line. The absence of rubbing elements in the design makes membrane regulators less dependent on the cleanliness of the working environment, unlike piston gearboxes, and more reliable. Valtec VT.085 1/2" membrane is made of reinforced EPDM. | 2198 |
Piston reducer VALTEC VT.087 1/2" | The VALTEC VT.087 1/2" piston regulator is designed to reduce the pressure force in lines in which compressed air, water, glycol-based coolants and gases with temperatures up to +80˚C are used as the working medium. At the outlet of the gearbox, the pressure does not exceed set value, regardless of pressure differences.Adjustment is carried out in the range of 1-4.5 bar.The device body and all its parts are made of special high-quality brass, springs are made of stainless steel, and seals are made of EPDM. | 862 |
Domestic water pressure regulator RDV
| Model/Image | Description | Average cost, rub. |
|---|---|---|
Clutch regulator RDV15-2A-M for cold and hot water | The stabilizing reducer model RDV 15-2A-M is used in various water supply systems to regulate liquid pressure up to neutral value. The 15-2A-M regulator consists of a brass body with a spring-loaded piston, an adjustment unit and two pipes. RDV is used in water supply systems of utilities and industry to reduce the pressure level to the required value. The stabilization reducer can significantly increase the reliability of hydraulic devices installed after the pressure regulator against water hammer and extend their service life. | 1102 |
Clutch regulator RDV-2A-M for cold and hot water | The RDV-2A-M coupling gearbox for adjusting the liquid pressure force is intended for use in water supply systems for municipal services and industrial facilities. Water with maximum temperature up to +70˚C. The body of the stabilizing regulator is made of brass. | 974 |
Clutch regulator RDV-2-M for cold and hot water | The pressure stabilization reducer RDV-2-M is designed for use in industrial and municipal water supply systems. By optimizing the flow force of the working medium, a uniform distribution of liquid is achieved between distant and short-range communications from the central highway, as well as between floors of high-rise buildings. The reliability of the system also increases and the service life of the equipment is extended. Water savings when a pressure regulator is included in the main line reach up to 30%, and the energy consumption of pumping units is also reduced. | 700 |
Clutch regulator RDV-2A-F for cold and hot water | The household water pressure regulator RDV-2A-F is produced in a solid brass body in the form of a tee combined with a filter made of stainless mesh. The device allows you to stabilize and equalize the pressure in water supply systems with cold and hot liquid. | 700 |
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