Underground ball valve found wide application in the field of installation of pipeline communications. It is used as a shut-off valve to shut off and regulate the flow of the working medium. Despite the simplicity of the design, it demonstrates high level reliability in operation, during its operation the presence of “stagnant” zones is excluded.
Underground cranes, presented on our website, have different purposes
- Equipping systems that transport aggressive and non-aggressive media;
- Controlled by a gearbox, but can be equipped with a pneumatic or electric drive;
- Operation under conditions of nominal pressure up to 16 MPa;
- Installation of communications in a wide range of diameters: 80-600 mm;
- Use on pipelines that are laid underground.
Design Features
The main working body underground ball valves serves as a shutter, which is steel ball with a through hole. When locking element is open, then the hole and the pipeline are parallel to the same axis. When the movement is blocked, the hole moves 90° and is located perpendicular to the pipe.
For the manufacture of fittings components, alloyed and stainless steel with high anti-corrosion properties. Elastic fluoroplastic is selected for sealing.
From design features underground cranes it is worth highlighting the availability extended rod. To connect the fittings to the pipeline, welding technology is used, which provides the following advantages:
- Tightness of communication;
- Reliability of the pipeline in operation
- No maintenance required.
When using this fittings, there is no need to create a manhole and enclosing structure. If there is a need to dismantle tap, then this is done by cutting off part of the pipes. During installation and dismantling works the shutter must be left in open position. Otherwise, the ball may be damaged. The fittings are selected depending on the operating conditions and technical characteristics pipeline system.
You can purchase from the StroyNefteGaz company underground ball valves for various pipelines. All models presented are different high quality performance and long service life.
For pipelines buried relative to the ground surface, an underground ball valve has been created driven by an electric motor, pneumatic cylinders, a gearbox or a T-shaped key. The body has a multi-layer anti-corrosion coating, the spindle extension is protected by a vertical shell pipe with a flange connection to the upper part of the valve body.
Design Features
Initially, the ball valve has more than 100 design options, each of which has its own marking in table No. 1 ST TsKBA 036 of 2007. For example, single-pipe 10nzh937p, coupling economy 10nzh12p, retro 10nzh11p, three-way 10nzh2p, welded 10s7p, all-metal monobody 10nzh13p, fitting 10nzh14p, reduction 10nzh24p, with leakage control 10s28p, with heating 10nzh29p, distribution 10s33p, and many other options.
Almost each of them is suitable for underground installation, but only after making special changes to the design. For example, installation inside a well and with simple backfilling with soil is possible. In the latter case, it is imperative to protect the extension cord with a tubular sheath along its entire length. The pipe is attached to the body with a flange, so a counter flange is required in the upper part.
Ball valve body
The design of the ball valve body depends on several objective factors:
- preparation method;
- development of design bureaus of a specific manufacturer’s plant;
- requirements of GOST, TU, OST and ST standards.
According to manufacturing technology, ball valves are divided into categories:
- in an all-metal non-separable body;
- two parts;
- of three elements.
In the first case, the body is turned on a machine, cast centrifugally into formwork, and welded from several tubular blanks or two stamped parts.
In the second version, the ball valve body is assembled on flanges from two vertical halves. In the latter case, the seat and ball are pulled together into a single package by side pipes through flanges using pins.
In addition, the body of an underground ball valve can be full bore or pressure reducing. In the first case, the internal diameter coincides with the cross-sectional size of the pipeline, and the hydraulic resistance inside the pipeline is minimal. In the second option, the valves are narrowed by one standard size, that is, they can reduce the flow characteristics of the working medium; diagnostic and cleaning devices will not be able to pass through such a valve.
A collapsible body made of 2 or 3 parts is much more convenient from the point of view of servicing shut-off valves. At any stage of operation and during scheduled maintenance, you can clean the internal cavity or replace the seat rings. A non-separable housing is much more airtight and cheaper to produce.
Some manufacturers use original technical solutions in the design of the ball valve body. For example, drainage system in the housing of large-diameter fittings allows you to drain condensate from the pipeline transporting natural gas.
When using hydraulic and pneumatic drives, they can be controlled from external sources and the transported medium itself. For this purpose, special holes are made in the housing and the drive is connected.
The bypass system allows you to safely equalize the pressure inside the valve cavity and behind the nozzles, which is especially important for ball valves DN 700 - 1400 mm.
The body material is carbon, alloy and stainless steel with the markings “c”, “hp” and “nzh”, respectively. Depending on the method of installing the ball valve underground, different protection of the body from aggressive environments is used:
- acrylic paint – has electrical insulating properties, protects the fittings from stray and induced currents;
- coal tar paint epoxy based– resistant to electrical corrosion and mechanical damage;
- polyurethane foam coating - used for well-free installation directly into the ground;
- polymer paintwork– standard protection against corrosion and mechanical damage.
Large-sized ball valves for underground installations are mounted using cranes and manipulators. For hooking, fabric and cable slings are used, but additional load-bearing devices are usually not installed on the hull.
Locking unit
Initially, an underground ball valve belongs to the category of rotary valves. There are cut-off, shut-off, regulating, shut-off-reducing and regulating-cut-off modifications for specific operating conditions. The main features of ball valves are:
- movement of the spherical plug from one extreme position (“open”) to another (“closed”) during the rotation of the spindle by 90 degrees, which is why the valve is called half-turn;
- the plug is mounted in supports, a wear-resistant anti-corrosion coating is applied to its surface;
- the seats have a ring design that evenly distributes the pressure of the working medium onto the ball;
- Manufacturers provide lubricant supply to the spindle and seat assemblies.
Included in the basic package of ball valves large diameter By default, a combined drive with the ability to operate on gas or liquid media is usually included. This is the most economical option to reduce the main pipeline operating budget.
The design of the plug in the supports makes it possible to spring the seats to the spherical plug or use the pressure of the working medium itself for the same purpose. This ensures maximum class A tightness of the valve assembly on both sides of the valve. Secondary soft seals and special grooves into which the rings go are, in turn, responsible for the safety of the rings themselves.
Relieving pressure from the internal cavity of the valve body is only possible when transporting liquid media. For gas pipelines, taps are produced with a sealed internal cavity without drainage or bypass.
Climatic performance according to GOST 15150 - “UHL”, “HL”, “U” or “T” is chosen by the customer himself.
Spindle and extension
Manufacturers of underground ball valves usually provide spindle extensions in the following sizes:
- less than 1000 mm;
- 1001 – 1500 mm;
- 1501 – 2000 mm;
- 2001 – 2500 mm;
- 2501 – 3000 mm.
In this case, the lower part of the tubular shell of the spindle extension is fixed with bolts with a mating flange on the ball valve body. A T-shaped wrench (usually in fire hydrants and chemical storage systems), pneumatic or hydraulic drive, gearbox with bevel, spur and worm gear, electric drive or hand wheel/handle.
If the hydraulic pneumatic drive is controlled by the working medium from the main pipeline, copper or steel tubes are additionally used, tying the valve body with the branch pipes of the drive device. The tubular shell of the spindle extension is covered with the same protective compounds, with which the body of the ball valve is protected - paint and varnish or polymer materials.
Drive device
For an underground ball valve, operation with all types of drives specified in the table of figures of GOST R 5272 of 2007 is allowed:
- 0 – remote control;
- 3 – 5 – mechanical gearbox with worm, cylindrical and bevel gear, respectively;
- 6 – pneumatic drive;
- 7 – hydraulic drive;
- 8 – electromagnetic solenoid;
- 9 – electric drive.
In addition, at the customer’s request, combined type drives can be installed - electrohydraulic, pneumohydraulic. For diameters from 400 mm, AAZK automatic machines are often used, closing the tap without operator intervention. For piston drives with liquid and gas working media, control units BUK, BUP and EPUU with power supply from 24 V, 110 V or 220 V DC are required.
To be used at gas facilities/mains in Moscow, a ball valve for underground installation must have a GasCert certificate. In heat supply systems, hot water supply and hot water supply, such documentation is not needed.
In addition to ball valves with all types of drives for any installation methods, our resource offers pipeline parts, shut-off, control, shut-off, emergency valves from leading brands of the Russian Federation and own production. Consultations for site visitors are absolutely free.
Today, in the infrastructure of everyone settlement– whether the population is small, medium or, conversely, large, there is a huge number of pipelines for various purposes. The use of polymer pipes for the installation of water supply and gas networks significantly simplifies the maintenance of the entire system and its individual sections, and also increases their service life. To regulate the media flow and control the efficiency of the system in underground polymer networks, fittings made of appropriate materials are used - PE ball valves.
The convenience of using this type of fittings lies in the fact that its installation is carried out using a well-free method. To install a ball valve on a network, it is not necessary to equip a well; after installation on the network, it is enough to fill the valve with soil, bringing the control mechanism to the surface. These products are currently produced by many companies, both domestic and foreign, and their use is justified. The use of polyethylene ball valves allows you to quickly solve various technical problems, ensuring reliable shutoff of the flow of medium flowing through the pipeline.
The laying of underground pipelines is carried out at different depths, however, in the Russian climate, many networks require pipes to be laid quite deep - below the freezing point. Due to the peculiarities of network installation, the issue of ease of access to the fittings installed on the network arises. Every polyethylene (HDPE) ball valve must be controllable at all times, regardless of its installation depth.
For this purpose they use different kinds control devices, in particular, rods and spindles of fixed and telescopic length, which are brought to the surface and serve to control pipeline equipment and its preventive maintenance.
In addition to making it easier to control underground installation devices, spindles and rods extend their service life, since they take on part of the driving load on the opening-closing mechanism. For the safety of the device and control mechanisms, it is customary to place the ball valve under the carpet. Installation of cranes under carpets is used in cases where the areas where the fittings are located are under the roadway or in other dangerous conditions. As protective agent Hatches are also used for underground installation fittings. Unlike carpets, hatches are located flush with the surface of the ground or road surface.
The use of a polyethylene crane in an underground design has a number of advantages compared to other types of fittings. First of all, the PE (HDPE) ball valve is compact in size and easy to control. Its installation on the network is carried out by butt or electrofusion welding.
To speed up and facilitate the installation of taps on the network, taps are produced with built-in metal embedded heaters. During the welding process, they melt polyethylene and connect the fittings to the pipes. Many manufacturers also equip their products with welding indicators - special marks that simplify the work of welding operators.
Today HDPE ball valves for polymer networks can have different design. In great demand use products made entirely of polyethylene. They are distinguished by strength, durability, complete resistance to corrosion, and the material used allows them to maintain elasticity, which makes them resistant to mechanical stress.
A polyethylene shut-off valve with a ball valve has several basic elements in its design - the body and the ball valve itself. The spherical valve has a hole of a certain diameter through which, in the open position of the device, the transported medium freely passes.
Shut-off ball valves can be full bore or part bore. The first option is more common: for such valves the diameter of the nominal diameter coincides with the diameter of the internal passage of the pipe. Full bore polyethylene ball valves are more efficient because they do not reduce network capacity.
In order to close the tap, it is necessary to rotate the control mechanism - handle, spindle, rod, lever - by 90 degrees. The shutter turns and blocks the media flow. To ensure that the structure is completely sealed when closed, the ball valve and control mechanism have seals in the form of plugs, gaskets and rings. In addition, in its design, the PE faucet can use pressing disc springs for additional fixation of the valve.
The use of ball valves on polymer networks is profitable and convenient. Most products are made of polyethylene low pressure grades PE 100 and PE 80. This is a durable material that adheres well to polymer pipes during the welding process. In addition, the polyethylene underground crane compares favorably with metal valves and gate valves - it is easier to operate and weighs significantly less.
Light weight has a lot of advantages: ease of transportation, ease of installation, insignificant loads on the pipeline.
Installing the device on the network plastic pipes small diameters do not require the use of additional supports and fixation, unlike cranes with metal elements in the structure.
Polyethylene is resistant to electrochemical corrosion, which is especially important for fittings on gas pipeline networks. The material resists corrosion well and withstands aggressive soils. A polyethylene ball valve installed on a water supply network retains its performance characteristics During a long time.
The average service life of the device is from 15 to 25 years, and all maintenance consists of opening and closing the shutter once every year.
The internal parts of the device are not subject to the formation of lime deposits and sediments. Polyethylene shut-off valves can be used in drinking water supply networks, as it complies with accepted hygienic and sanitary standards and parameters. The use of polyethylene ball valves on most gas and water supply networks allows you to save money on the installation and arrangement of the network, while maintaining its efficiency and operational safety.
The Hermes LLC company is the exclusive representative of the Daeyoun plant and supplies SDR11 polyethylene ball valves from this manufacturer to Russia, as well as telescopic extensions for them.
General characteristics polyethylene ball valves:
- A ball valve of the DEEN brand (Dayoun) is designed to control the flow of a medium (open/close) through a pipeline by turning the shut-off element 90 degrees.
- Temperature Range From -29 to 600С
- Fully plastic construction, providing maximum corrosion resistance. The ovality of the ball does not exceed 30㎛.
- The crane is completely made of HDPE by welding without the use of any adapters for other materials or flange connections.
- The presence of a support bearing in the center of the bottom ensures smooth sliding of the ball inside the valve (the ball does not shift).
- The presence of a special anti-freeze lubricant on the ball.
- The presence of three sealing rings installed between the bearing and the housing, which increase the level of tightness.
- The presence of an O-ring installed between the adapter and the body prevents soil and dust from entering the inside of the tap.
- The presence of a pin between the adapter and the bearing securely fixes the valve ball during its opening and closing.
- Opening/closing with 1/4 turn. If the taps are equipped with a 2 ½ turn mechanical gearbox.
- The length of the pipe is designed for two welds.
- No faucet required Maintenance and is controlled by a rod.
- The adapter is made of injection molded polypropylene. There is a locking device at the bottom of the adapter that prevents rotation beyond 90°. An O-ring is inserted inside the adapter to prevent foreign particles from entering.
- No corrosion protection measures are required.
- There is no need to install any protective chamber or well around the tap; it can be buried with the same material as the rest of the pipeline.
- Production is certified according to ISO 9001 and JIS Q 9001 standards.
- Wide range of product sizes (from 20 mm to 400 mm).
- Guarantee period 2 years.
- Guaranteed shelf life (provided the original packaging remains sealed) is 10 years.
- Controlled using a telescopic rod.
Technical characteristics of polyethylene ball valves:
 |
Type and application |
Underground installation (for gas 10 bar/water supply 16 bar) |
|
Material |
PE80/PE100, PE2406/PE3408 |
|
|
Opening/closing |
¼ turn |
|
|
Temperature |
From -29 to 600C |
|
|
Passage type |
Full bore |
|
|
Auxiliary rod type |
Telescopic extension |
|
|
Purge type |
No purges, 1 purge, 2 purges |
|
|
Welding of body and socket |
Electric welding or coupling |
|
|
Test standards |
EN 1555, ANSI/ASTM B16. 40 |
Construction of polyethylene ball valves:
Dimensional and mass characteristics of polyethylene ball valves:
| Standard PE Ball Valves |
ISO Diameter (mm) |
|
 |
||
|
315 (Full bore) |
||
| PE ball valves without purge (ISO) |
ISO Diameter (mm) |
Note |
 |
||
| With mechanical gearbox | ||
|
315 (Full bore) |
||
| PE single blow ball valves (ISO) |
ISO Diameter (mm) |
Note |
 |
Without mechanical gear | |
| With mechanical gearbox | ||
|
315 (Full bore) |
||
| Type Standard (NPC) | |||||
 |
Full bore polyethylene ball valves for gas made of PE 100 (PE 100) with a nominal cross-section: 25/32-200/225 mm. PN 10, SDR 11 | DN, mm | Weight, kg/piece |
Construction length, mm |
|
Polyethylene ball valves are used in the construction of gas and water supply systems. HDPE ball valves can be installed both in wells/chambers, and there is an option for non-well installation, while the valve for underground installation is equipped with a telescopic extension, and the extension rod is brought out under the cover of the above-ground carpet.
As a rule, polyethylene ball valves are produced with diameters from 32 mm to 315 mm.
Working pressure: gas – up to 10 bar, water – up to 16 bar.
A polyethylene ball valve is connected to a HDPE pipe either by electric welding fittings or by butt welding.
We offer ball valves from Georg Fischer, Plastitalia, Polyvalve And Frialen.
SPECIAL OFFER for HDPE ball valves
Frialen and Polyvelve polyethylene ball valves for water and gas supply at special prices!
d 110 mm - 15,000.00 rub.
d 160 mm - 29,000.00 rub.
We can equip the HDPE ball valve with the following accessories:
- Telescopic extension for crane;
- Key for HDPE ball valve;
- Extension for the HDPE ball valve key in a protective casing.
The telescopic extension is designed to open or close a PE ball valve.
Extension design:
- an axis that is made of metal;
- protective casing made of polyethylene to protect the metal part of the tap from corrosion.
The ball valve key is made of polyvinyl chloride (PVC) in the shape of a hexagon.
The polyethylene tap was originally invented for the construction of gas networks, but today the polyethylene tap is actively used in the construction of water supply networks. Often, a polyethylene tap is used as a replacement for conventional valves, since a polyethylene tap is easier and cheaper to install than a gate valve.
On HDPE pipelines, a prefabricated PE valve is also used, which is attached to the HDPE pipes with a collet clamp, otherwise it is called a compression valve. There is no need to confuse these products. The compression tap can only be used on water pipes and such taps are only available up to 110 mm in diameter. In this section we present a HDPE valve, which can also be used on gas pipelines. This HDPE crane can withstand operating pressure up to 16 atmospheres on the water supply, and polyethylene gas tap withstands pressure up to 12 atmospheres.
The design feature of ball valves is the use of ball support bearings (ball in trunnions). This design allows you to reduce the moment when opening a polyethylene ball valve when large differences pressure in gas distribution and water supply systems. When using a rod extension, it is possible to install the ball valve in the ground without a well; also, for a non-well installation, a carpet and a support plate under the carpet are used to provide access to the valve control on the surface.
Ball Valves They are not inferior in characteristics and quality to metal ball valves, and in some characteristics they surpass them. Polyethylene ball valves from Polyvalve manufacturers - Andronaco, Polytec, Frialen, Georg Fischer (+GF+), Daeyoun, FOX.
PE ball valves are distinguished by high quality, excellent characteristics and performance.You can buy HDPE ball valves by contacting our company; polyethylene ball valves are always available in our warehouse. We offer to buy ball valves from different (European and Korean) manufacturers at low prices.
|
Table of materials Ball valve PE100 SDR11 |
||
| № | Component | Material |
| 1 | Frame | PE - polyethylene |
| 2 | Pipes | PE-polyethylene |
| 3 | Ball | PP - polypropylene |
| 4 | Ball seal | NBR - rubber |
| 5 | Fixing ring | PP - polypropylene |
| 6 | Bearing | Acetal |
| 7 | Adapter | PP - polypropylene |
| 8 | Rod seal | NBR - rubber |
| 9 | Adapter seal | NBR - rubber |
HDPE ball valves
| General information for gas and water | ||
| Information | For Gas | For Water |
| Materials | PE100 | PE100 |
|
Maximum working pressure |
10 bar (1 MPa) | 16 bar (1.6 MPa) |
|
Pace. range |
-29 to + 60 C | -29 to + 60C |
|
Method connections |
welded welded with bushing |
welded welded with bushing |
| Passage type | ||
| Rod type |
short extended |
Short extended |
|
Standard Ratio dimensions |
SDR11 | SDR11 |
Competitive advantages of PE ball valves.
- Passed certification "GAZSERT"
- HDPE ball valves comply international standards
- Underground, well-free installation in the ground of PE ball valves
- Opening/closing 1/4 turn
- Polyethylene taps not subject to corrosion
- There are modifications of PE taps with purge
- Coupling and electric welded (reducing) connection
- Safety of HDPE materials
- No repairs are required for the entire service life of the HDPE pipeline
- Warranty period 2 years
Ball valves made of polyethylene PE100 SDR11, the best offer on the market of ball valves for gas distribution and water supply systems. We ship HDPE ball valves and extension rods for them to all regions of Russia and the CIS countries.
PE ball valves have all the necessary documents
| Name | Diameter |
*Price RUB |
| 25mm | from RUB 3,499.00 | |
| 32mm | from RUB 3,499.00 | |
| 40mm | from RUB 4,999.00 | |
| 50mm | from RUB 6,199.00 | |
| 63mm | from RUB 7,499.00 | |
| 90mm | from 12,990.00 rub. | |
| Polyethylene ball valve d110 | 110mm | from 12,990.00 rub. |
| Polyethylene ball valve d125 | 125mm | from 16,990.00 rub. |
| Polyethylene ball valve d160 | 160mm | from 33,999.00 rub. |
| Polyethylene ball valve d180 | 180mm | from RUB 39,999.00 |
| Polyethylene ball valve d200 | 200mm | from 54,999.00 rub. |
| 225mm | from 89,990.00 rub. | |
| Polyethylene ball valve d225mechanical gearbox | 225mm | from 99,990.00 rub. |
| Polyethylene ball valve d250mechanical gearbox | 250mm | from 199,990.00 rub. |
| Polyethylene ball valve d280 mechanical gearbox | 280mm | from 229,990.00 rub. |
| Polyethylene ball valve d315 full bore mechanical gearbox |
315mm | from 339,990.00 rub. |
| Polyethylene ball valve d355mechanical gearbox | 355mm | from 399,990.00 rub. |
| Polyethylene ball valve d400mechanical gearbox | 400mm | from 499,990.00 rub. |
| Polyethylene ball valve d630mechanical gearbox | 630mm | on request |
| Drive rod (telescopic rod) | L=1.2-2 m. | from RUR 2,999.00 |
| T-key | L=1.2 m. | RUB 1,500.00 |
Prices for HDPE ball valves
* The price for PE ball valves is indicated including VAT at the Central Bank exchange rate as of 04/01/2017. on special conditions acquisitions. In accordance with the company's commercial policy, the selling price may vary. Accurate price calculations for HDPE ball valves are made based on the client’s application and are reflected in the invoice for payment. This is not a public offer.
*** Conditions free shipping HDPE cranes: delivery is carried out to the terminal closest to the customer transport company, with 100% prepayment of the cost of ordering HDPE ball valves in the amount of over 100,000 (one hundred thousand) rubles. The MOVE company reserves the right to select a transport company. Delivery times and procedures are discussed separately. The terms of free delivery apply to transportation up to 3000 km, for transportation over 3000 km. MOVE company reserves the right to partially compensate the customer for the cost of transportation.
For questions regarding cooperation and additional discounts, please contact the company.
You can buy PE ball valves from our company on the most favorable terms, every client is important to us!
Components of HDPE ball valves.
Stocks
Ball Valves
