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Special full-lift spring safety valve with a lever for control blowdown, type SPPK4R-16 (17s6nzh)

Designed to limit the pressure of non-aggressive gases by venting gas into the atmosphere to a set value when the pressure in the network rises above the permissible limit. Installed on medium and high pressure gas pipelines.

Specifications

	SPPK4R-50-16	SPPK4R-80-16	SPPK4R-100-16	SPPK4R-150-16
Regulated environment	natural gas according to GOST 5542-87
Working environment temperature, ° С	from -40 to +600
Maximum working pressure, MPa	1,6	1,6	1,6	1,6
Regulation limits (using replaceable sets of springs), MPa	0,05-1,6	0,05-1,6	0,05-1,6	0,05-1,6
D at the connecting pipe, mm
entrance	50	80	100	150
exit	80	100	150	200
Saddle diameter, mm	30	40	48	75
Overall dimensions, mm	600 × 210 × 185	690 × 247 × 205	845 × 267 × 280	1055 × 345 × 315
Weight, kg, no more	29	40	53	94

Device and principle of operation

The valve inlet (see figure) is connected to the controlled section of the gas pipeline after the pressure regulator. A spool 1 is installed in the valve body, pressed against the seat by a spring 2, the force of which is regulated by moving the support washer 3 by rotating in the thread of the screw 4. When the pressure in the inlet pipe rises above the specified value, the spool rises slightly, the gas pressure begins to act on the entire end surface of the spool, which is much larger than the central part, as a result of which the static pressure increases, pushing the spool up. In addition, the inwardly chamfered surface of the valve lip deflects downwardly the gas flowing out of the seat. This deflection of the flow creates a reactive force which is added to the already increased static pressure on the spool. The balance between the spring force and the gas pressure on the spool is broken, and the spool jerkily rises to its uppermost position. When the pressure in the gas pipeline decreases, the gas pressure on the spool cannot overcome the force of the compressed spring and the spool quickly sits on the seat, hermetically shutting off the gas flow. The valve is equipped with a lever 5 for forced opening.

SPPK- relief spring safety valves are designed to protect various industrial equipment from unacceptable excess of the set pressure. SPPK They are used in industrial tanks, hot water and other boilers, technical tanks and pipelines for automatic discharge of the working medium into the atmosphere (gas, steam) or the outlet pipeline (liquid) After the pressure drops to the required limit, the safety valve stops the discharge. The calculation of the throughput is carried out in accordance with GOST 12.2.085.

Safety valve range

№	DN, mm	PN, kgf / cm 2
		40, 100, 160
		16, 40, 63, 160
		16, 40, 63, 160
		16, 40, 63, 160
	150M	16, 40
	150M1

	200M

Safety valves SPPK are made of steel grades 20L, 20GL, 12X18N9TL, 12X18N12M3TL with a flange connection, with a PU switching device for forced opening or without it. Safety relief valves are designed for liquid and gaseous, chemical or oil working environments, the tightness corresponds to TU 3742-004-07533604-95.
Valve closing pressure - Рз not less than 0.8 Рн.
Рн - setting pressure (the highest, excess pressure at the valve inlet, at which the specified tightness in the valve is ensured).
The full opening pressure of the valves is equal to:
- (Rn + 0.5) kgf / cm 2 - at a setting pressure of 0.5 to 3 kgf / cm 2;
- 1.15 Rn kgf / cm 2 - at a setting pressure of over 3 kgf / cm 2 up to 60 kgf / cm 2;
- 1.1 Rn kgf / cm 2 - at a setting pressure over 60 kgf / cm 2.
The setting pressure (Rust) is the preset pressure at the inlet to the relief valve, at which the valve spool starts to rise and the valve opens. The manufacturer adjusts the safety valve to the opening start pressure without back pressure at the valve outlet (the test medium is discharged to atmosphere). When ordering, it is necessary to indicate the opening start pressure (set pressure) to which the valve must be set, it is also necessary to take into account the effect of back pressure, if it is present in the system at the valve outlet.
Bellows valves are a balanced type mechanism that compensates for the back pressure effect at the valve outlet. The bellows also protects the relief valve spring from the harmful effects of the process fluid, high or low temperature of the process fluid. Bellows valves made of steel 12X18H9TL are designed for working environments with temperatures up to minus 1100C.
By steel grades, relief safety valves are manufactured in two versions:
1. body - steel 20L, spool, seat - steel 20X13 (type 17s..U1);
2. body - steel 12Х18Н9ТЛ, spool, seat - made of steel 12Х18Н9Т with overlaying ЦН-12М (type 17nzh..UHL1);
3. body - steel 20GL, spool, seat made of steel 12X18N9TL with overlaying TsN-12M (type 17ls..HL1);
4. body - steel 12Kh18N12M3TL, spool, seat - of steel 10Kh17N13M3T with TsN-12M overlay (type 28nzh..UKHL1).
The spring in all versions is made in accordance with GOST 16118-70 from steel 50HFA.
To check the correctness of the action in working order, the safety valves SPPK R have a device for manual opening and blowing. Valves SPPK- without manual opening device.
The connecting dimensions and the dimensions of the sealing surfaces of the flanges of the relief valves correspond to GOST 12815-80.
Valves DN 25 mm PN 100 kgf / cm2 are manufactured with threaded choke-end connection: M48x2 at the inlet, M56x2 at the outlet.
When ordering safety valves, please specify:
- product name, designation,
- nominal size (nominal bore) (DN, mm),
- nominal (conditional) pressure (PN, kgf / cm2),
- pressure of the beginning of opening (Рн.о, kgf / cm2) or the number of the spring,
- material execution,
- the need for a device for manual opening.
An example of designation when ordering (and in other documentation) a valve DN 50 mm PN 40 kgf / cm2 made of steel 12X18N9TL with manual opening, opening pressure - Рн. About 14 kgf / cm2: Safety valve SPPK 4R-50-40 DN 50 mm PN 40 kgf / cm2 Rn. About 14 kgf / cm 2 17nzh25nzh

Spring safety valve SPPK for water and gas: technical characteristics

Indicators for the purpose of safety valves

Parameter name	17s	17hp	17nzh	28nzh
	Climatic performance
		HL1	UHL1	UHL1
Working environments	Water, air, steam, ammonia, natural gas, oil, oil products, liquid and gaseous hydrocarbons and media that are not aggressive to 20L steel. Corrosion rate of steel in which no more than 0.1 mm / year	Water, air, steam, wet natural gas, oil products, liquid and gaseous petrochemical products, corrosion rate of steel 20ХН3Л, 20ГЛ in which no more than 01 mm / year	Water, air, steam, wet natural gas, oil products containing hydrogen sulfide up to 0.1%, liquid and gaseous hydrocarbons, petrochemical media, corrosion rate of steel 12Х18Н9ТЛ in which no more than 0.1 mm / year	High-sulfur natural gas, oil products with a high content of hydrogen sulfide, hydrogen sulfide (partial pressure Н 2 S≥0.34 kPa), corrosion rate of steel 12Х18Н12М3ТЛ in which no more than 0.1 mm / year
Working environment temperature	From -40 0 С to +425 0 С	From -60 0 С to +425 0 С	From -60 0 С to +600 0 С	60 0 С to +100 0 С
Operating conditions GOST 15150-69	U1, T1	HL1	UHL1	UHL1
Minimum ambient temperature	40 0 C	60 0 C	60 0 C	60 0 C

Safety valve body flange design

Nominal (conditional) valve pressure, kgf / cm 2	Inlet flange		Outlet flange
Nominal (conditional) valve pressure, kgf / cm 2	PN, kgf / cm 2		PN, kgf / cm 2	Connecting dimensions and sealing surface according to GOST 12815-80
PN 16		Execution 1	6 or 16	Execution 1
PN 40		Execution 3		Execution 1
PN 63		Version 7		Execution 3 or 2
PN 160		Version 7		Execution 3

Application of springs according to pressure setting of the safety valve

Valve designation	PN, kgf / cm 2	Saddle flow path diameter, d c, mm	Setting pressure limits at the beginning of opening Р n, kgf / cm 2	Factory Specification Spring Number
SPPK 4 25-40 SPPK 4R 25-40 SPPK 4S 25-40 SPPK 5S 25-40 SPPK 5RS 25-40			4..8
			8..16
			16..25
			25..40
SPPK 25-100 SPPK R 25-100			4..8
			8..16
			16..25
			25..50
			50..80
			80..100
SPPK 4 50-16 SPPK 4R 50-16 SPPK 5S 50-16 SPPK 5RS 50-16			0,5..1,2
			1,2..2,5
			2,5..4
			4..8
			8..16
SPPK 4 50-40 SPPK 4R 50-40 SPPK 4S 50-40 SPPK 5S 50-40 SPPK 5RS 50-40			0,5..1,2
			1,2..2,5
			2,5..4
			4..8
			8..20
			20..30
			30..40
SPPK 4 80-16 SPPK 4R 80-16 SPPK 5S 80-16 SPPK 5RS 80-16			0,5..1,2
			1,2..3
			3..5
			5..8
			8..16
SPPK 4 80-40 SPPK 4R 80-40 SPPK 4S 80-40 SPPK 5S 80-40 SPPK 5RS 80-40			0,5..1,2
			1,2..3
			3..5
			5..8
			8..20
			20..30
			30..40
SPPK 4 80-63 SPPK 4R 80-63 SPPK 5S 80-63 SPPK 5RS 80-63			25..35
			35..44
			44..50
			50..63
SPPK 4 80-160 SPPK 4R 80-160 SPPK 5S 80-160 SPPK 5RS 80-160			63..100
			100..135
			135..160
SPPK 5 100-16 SPPK 5R 100-16 SPPK 5S 100-16 SPPK 5RS 100-16			0,5..1
			0,8..1,6
			1,5..3
			2,5..4,5
			4,5..8,5
			8..16
SPPK 5 100-40 SPPK 5R 100-40 SPPK 5S 100-40 SPPK 5RS 100-40			8..16
			16..26
			26..40
SPPK 4 150-16M SPPK 4R 150-16M SPPK 4S 150-16 SPPK 4 150-16M1 SPPK 4R 150-16M1 SPPK 5S 150-16 SPPK 5RS 150-16			0,5..1,5
			1,5..3
			3..5
			5..8
			8..12
			12..16
SPPK 4 150-40M SPPK 4R 150-40M SPPK 4S 150-40 SPPK 5S 150-40 SPPK 5RS 150-40			8..12
			12..18
			18..25
			25..35
			35..40
SPPK 4 200-16 SPPK 4R 200-16 SPPK 5S 200-16 SPPK 5RS 200-16			0,5..1
			1..2
			2..3
			3..5
			5..7
			7..9

Safety spring valves SPPK4, SPPK4R the direction of the medium supply is under the spool. The force of the compressed spring presses the spool against the seat, when the pressure of the working medium exceeds the set value, an opposite force acts on the spool, which compresses the spring and opens the passage for the discharge of the working medium. After the pressure in front of the valve has decreased to the back-seating pressure, the spool is again pressed against the seat by the force of the spring, stopping the discharge of the medium.

Safety valves are designed for liquid and gaseous, chemical or oil working media. The standards of tightness in the valve are in accordance with GOST 9789-75.

Safety valves are designed to protect equipment from inadmissible excess of the set pressure. They are used in tanks, boilers, containers, vessels and pipelines for automatic discharge of the working medium into the atmosphere or in the discharge pipeline. After reducing the pressure to the desired limit, the safety valve stops the discharge of the medium. The calculation of the throughput is carried out in accordance with GOST 12.2.085.

the valves are marked as SPPK4R-100-16, where the alphanumeric designation means the following:

SPPK - special spring-loaded safety valve;

4 - valve modification number;

P - indicates the presence of a handwheel lever (if it is absent, the letter is not indicated);

100 - nominal bore at the inlet in mm (DN);

16 - working pressure in kgf / cm2 (PN);

Safety valves according to the traditional "figure table" have a symbol type 17s17nzh or 17s25nzh, where:

17 - designation of the type of fittings - safety valve;

c - designation of the valve body material (steel 20L);

17 or 25 - conventional numbers indicating the valve modification number;

nzh - designation of the material of the valve seat.

Valves of types SPPK and SPPK4R belong to full-lift spring-loaded safety valves of two-position action of a closed type, but they work as full-lift valves only on gaseous (vaporous) media. When operating on liquid (incompressible) media, the throughput of the SPPK and SPPK4R valves is 4-8 times less than when operating on gaseous media.

Safety valves for checking serviceability and purging in working condition. The SPPK4R type valves have a special lever for manually opening a "manual firing" device. The valves of the SPPK4 type have no lever.

Safety spring flanged valves made of steel 20L with a device for forced opening

Working medium - water, air, steam, ammonia, natural gas, oil, oil products, liquid and gaseous hydrocarbons and media that are not aggressive to steel 20L, with temperatures from minus 40C to plus 425C. The minimum ambient temperature during operation is minus 40C.

Designation, type, tab. figures
SPPK4R 50-16 17s6nzh
SPPK4R 80-16 17s6nzh
SPPK4R 100-16 17s6nzh
SPPK4R 150-16 17s6nzh
SPPK4R 200-16 17s17nzh
SPPK4R 25-40 17s25nzh
SPPK4R 50-40 17s21nzh
SPPK4R 80-40 17s21nzh
SPPK4R 100-40 17s21nzh
SPPK4R 150-40 17s21nzh
SPPK4R 50-63 17s89nzh
SPPK4R 80-63 17s89nzh
SPPK4 50-160 17s90nzh
SPPK4 80-160 17s90nzh

Safety valves spring-loaded flanged from steel 20L without a device for forced opening

Climatic modification - U1 GOST 15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set;

Designation, type, tab. figures
SPPK4 50-16 17s7nzh
SPPK4 80-16 17s7nzh
SPPK4 100-16 17s7nzh
SPPK4 150-16 17s7nzh
SPPK4 200-16 17s13nzh
SPPK4 25-40 17s14nzh
SPPK4 50-40 17s23nzh
SPPK4 80-40 17s23nzh
SPPK4 100-40 17s23nzh
SPPK4 150-40 17s23nzh
SPPK4 50-63 17s85nzh
SPPK4 80-63 17s85nzh
SPPK4 50-160 17s80nzh
SPPK4 80-160 17s80nzh

Safety spring flanged valves made of steel 12X18N9TL with a device for forced opening

Climatic version - UHL1 in accordance with GOST 15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set;

Designation, type, tab. figures
SPPK4R 50-16nzh 17nzh17nzh
SPPK4R 80-16nzh 17nzh17nzh
SPPK4R 100-16nzh 17nzh6nzh
SPPK4R 150-16nzh 17nzh6nzh
SPPK4R 200-16nzh 17nzh17nzh
SPPK4R 25-40nzh 17nzh25nzh
SPPK4R 50-40nzh 17nzh25nzh
SPPK4R 80-40nzh 17nzh25nzh
SPPK4R 100-40nzh 17nzh21nzh
SPPK4R 150-40nzh 17nzh21nzh
SPPK4R 50-63nzh 17nzh89nzh
SPPK4R 80-63nzh 17nzh89nzh
SPPK4R 100-63nzh17nzh89nzh
SPPK4R 50-160nzh17nzh90nzh
SPPK4R 80-160nzh17nzh90nzh

Safety spring flanged valves made of steel 12X18H9TL without a device for forced opening

Climatic version - UHL1 in accordance with GOST15150;

Purpose and scope - for automatic release of the medium when the pressure rises above the set;

Working medium - water, air, steam, ammonia, wet natural gas, oil products containing hydrogen sulfide up to 0.1%, liquid and gaseous hydrocarbons, petrochemical media with temperatures from minus 60C to plus 60C. The minimum ambient temperature is minus 60C.

Designation, type, tab. figures
SPPK4 50-16nzh 17nzh13nzh
SPPK4 80-16nzh 17nzh13nzh
SPPK4 100-16nzh 17nzh7nzh
SPPK4 150-16nzh 17nzh7nzh
SPPK4 200-16nzh 17nzh13nzh
SPPK4 25-40nzh 17nzh14nzh
SPPK4 50-40nzh 17nzh14nzh
SPPK4 80-40nzh 17nzh14nzh
SPPK4 100-40nzh 17nzh23nzh
SPPK4 150-40nzh 17nzh23nzh
SPPK4 50-63nzh 17nzh 85nzh
SPPK4 80-63nzh 17nzh85nzh
SPPK4 100-63nzh 17nzh85nzh
SPPK4 50-160nzh 17nzh80nzh
SPPK4 80-160nzh 17nzh80nzh

When ordering safety valves, please specify:

Product name, designation;

Nominal size (nominal bore) (DN, mm);

Nominal (conditional) pressure (PN, kgf / cm2);

Opening start pressure (Рн.о, kgf / cm2) or spring number;

Material execution;

The need for a device for manual opening.

To order Safety spring valves SPPK4, SPPK4R, delivery time, you can use the order form or contact information. On request, we will provide: a diagram, a passport, a certificate, a permit.

Purpose: relief spring safety valves SPPK are used to protect various industrial equipment from unacceptable excess of the set pressure and designed for liquid, gaseous, chemical or petroleum working environments.SPPK are used in industrial tanks, hot water and other boilers, technical tanks and pipelines for automatic discharge of the working medium into the atmosphere (gas, steam) or the outlet pipeline (liquid). After the pressure drops to the desired limit, the safety valve stops dumping. The calculation of the throughput is carried out in accordance with GOST 12.2.085.

Description: SPPK valves have a medium flow direction - under the spool. The force of the compressed spring presses the spool against the seat, when the pressure of the working medium exceeds the set value, an opposite force acts on the spool, which compresses the spring and opens the passage for dumping the working medium. After the pressure in front of the valve is reduced to the back-seating pressure, the spool is again pressed against the seat by the force of the spring and the discharge of the medium stops.

By steel grades, safety valves SPPK are manufactured in the following versions:

1. body - steel 20L, spool, seat - made of steel 20X13 (type 17s ... U1);

2. body - steel 12Х18Н9ТЛ, spool, seat - made of steel 12Х18Н9Т with overlaying TsN-12M (type 17nzh ... UHL1);

3. body - steel 20GL, spool, seat made of steel 12X18N9TL with overlaying TsN-12M (type 17ls ... HL1);

4. body - steel 12Х18Н12М3ТЛ, spool, seat - made of steel 10Х17Н13М3Т with overlaying TsN-12M (type 28nzh ... UHL1).

The spring in all versions is made in accordance with GOST 16118-70 from steel 50HFA.

Valve closing pressure - Рз not less than 0.8 Рн.

Рн - setting pressure, the highest excess pressure at the valve inlet, at which the specified tightness in the valve is ensured. The full opening pressure of the valves is equal to:
- (Rn + 0.5) kgf / cm2 - at a setting pressure of 0.5 to 3 kgf / cm2;
- 1.15 Rn kgf / cm2 - at a setting pressure of over 3 kgf / cm2 up to 60 kgf / cm2;
- 1.1 Rn kgf / cm2 - at a setting pressure over 60 kgf / cm2.

The set pressure (Rust) is the preset pressure at the valve inlet, at which the valve spool starts to rise and the valve opens. The manufacturer adjusts the valve to the opening start pressure without back pressure at the valve outlet (the test medium is discharged into the atmosphere).

When ordering, the consumer must indicate the opening start pressure (set pressure) to which the valve must be set. In this case, it is necessary to take into account the effect of back pressure, if it is present in the system at the outlet of the valve.

Bellows valves are a balanced type mechanism that compensates for the back pressure effect at the valve outlet. The bellows also protects the valve spring from the harmful effects of the process medium, high or low temperature of the medium. Bellows valves made of steel 12X18H9TL are designed for working environments with temperatures up to minus 1100C.

To check the correctness of the action in working condition, the SPPKR valves have a device for manual opening and blowing. SPPK valves - without manual opening device. The connecting dimensions and dimensions of the sealing surfaces of the valve flanges are in accordance with GOST 12815-80.
Valves DN 25 mm PN 100 kgf / cm2 are manufactured with threaded choke-end connection: M48x2 at the inlet, M56x2 at the outlet.

When ordering valves, please specify:
- product name, designation,
- nominal size (nominal bore) (DN, mm),
- nominal (conditional) pressure (PN, kgf / cm2),
- pressure of the beginning of opening (Рн.о, kgf / cm2) or the number of the spring,
- material execution,
- the need for a device for manual opening.

An example of designation when ordering (and in other documentation) of a valve DN 50 mm PN 40 kgf / cm2 made of steel 12X18N9TL with manual opening, opening start pressure - Рн. About 14 kgf / cm2:
Safety valve SPPK4R-50-40 DN 50 mm PN 40 kgf / cm2 Rn. About 14 kgf / cm 2 17nzh25nzh

SPPK specifications:

	SPPK4R-50-16	SPPK4R-80-16	SPPK4R-100-16	SPPK4R-150-16
Regulated environment	natural gas GOST 5542-87	natural gas GOST 5542-87	natural gas GOST 5542-87	natural gas GOST 5542-87
Working environment temperature, о С	from -40 to +600	from -40 to +600	from -40 to +600	from -40 to +600
Saddle diameter, mm	30	40	48	75
Connection pipe diameter: - entrance, mm - exit, mm		100	100 150	150 200
Maximum working pressure, MPa	1,6	1,6	1,6	1,6
Regulation limits (using interchangeable sets of springs), MPa	0,05 — 1,6	0,05 — 1,6	0,05 — 1,6	0,05 — 1,6
Overall dimensions, mm	600x210x185	690x247x205	845x267x280	1055x345x315
Weight, kg, no more	29	40	53	94

Indicators for the purpose of safety valves

Parameter name	17s	17hp	17nzh	28nzh
	Climatic performance
	Y1	HL1	UHL1	UHL1
Working environments	Water, air, steam, ammonia, natural gas, oil, oil products, liquid and gaseous hydrocarbons and media that are not aggressive to 20L steel. Corrosion rate of steel in which no more than 0.1 mm / year	Water, air, steam, wet natural gas, oil products, liquid and gaseous petrochemical products, corrosion rate of steel 20ХН3Л, 20ГЛ in which no more than 0.1 mm / year	Water, air, steam, wet natural gas, oil products containing hydrogen sulfide up to 0.1%, liquid and gaseous hydrocarbons, petrochemical media, corrosion rate of steel 12Х18Н9ТЛ in which no more than 0.1 mm / year	High-sulfur natural gas, oil products with a high content of hydrogen sulfide, hydrogen sulfide (partial pressure Н 2 S≥0.34 kPa), corrosion rate of steel 12Х18Н12М3ТЛ in which no more than 0.1 mm / year
Working environment temperature	From -40 0 С to +425 0 С	From -60 0 С to +425 0 С	From -60 0 С to +600 0 С	60 0 С to +100 0 С
Operating conditions GOST 15150-69	U1, T1	HL1	UHL1	UHL1
Minimum ambient temperature	40 0 C	60 0 C	60 0 C	60 0 C