Spring valves SPPK

Safety spring valves of direct action, medium supply direction - under the spool. The force of the compressed spring presses the spool to the seat, when the pressure of the working medium exceeds the set value, the 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 is reduced to the back-seat pressure, the spool is pressed against the seat again under the action of the spring force, and the discharge of the medium stops.
Closing pressure of the valves - Pz not less than 0.8 Rn.

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

The set pressure (Rust) is a pre-set pressure at the inlet to the valve, at which the valve spool begins to rise and the valve opens. The valve is adjusted to the opening pressure by the manufacturer without counterpressure at the valve outlet (the test medium is discharged into the atmosphere).

When ordering, the user must specify the opening pressure (set pressure) to which the valve must be set. In this case, the effect of back pressure, if it exists in the system at the outlet of the valve, must be taken into account.

Bellows valves are a balanced type mechanism that compensates for the effect of back pressure at the outlet of the valve. The bellows also protects the valve spring from the harmful effects of the working medium, high or low temperature of the working medium. Bellows valves made of steel 12Kh18N9TL are designed for working environments with temperatures up to minus 1100C.

According to steel grades, safety valves are manufactured in two versions:
1. body - steel 20L, spool, seat - steel 20X13 (type 17s ... U1);
2. body - steel 12Kh18N9TL, spool, seat - steel 12Kh18N9T with hardfacing TsN-12M (type 17nzh ... UHL1);
3. body - steel 20GL, spool, seat made of steel 12Kh18N9TL with hardfacing TsN-12M (type 17ls ... KhL1);
4. body - steel 12Kh18N12M3TL, spool, seat - steel 10Kh17N13M3T with hardfacing TsN-12M (type 28nzh ... UHL1).
The spring in all versions is made according to GOST 16118-70 from steel 50HFA.

To check the correct operation in working condition, the SPPKR valves have a device for manual opening and purging. SPPK valves - without a device for manual opening. Mounting dimensions and dimensions of sealing surfaces of valve flanges according to GOST 12815-80.
Valves DN 25 mm PN 100 kgf/cm2 are manufactured with a threaded fitting-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),
- opening start pressure (Рн.о, kgf/cm2) or spring number,
- performance according to the material,
- 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 12Kh18N9TL with manual opening, opening start pressure - Рn.o 14 kgf/cm2:
Safety valve SPPK4R-50-40 DN 50 mm PN 40 kgf/cm2 Rn.o 14 kgf/cm 2 17nzh25nzh

Du (DN) 25 mm
Valve SPPK4R 17s25nzh Du 25 Ru 40, steel 20L, version U1
Valve SPKK4 17s14nzh Du 25 Ru 40, steel 20L, version U1
Valve SPKK4R 17nzh25nzh Du 25 Ru 40, steel 12X18N9TL, version U1
Valve SPKK4 17nzh14nzh Du 25 Ru 40, steel 12X18N9TL, version U1
Valve SPPKR 17s84nzh Du 25 Ru 100, steel 20L, version U1
Valve SPKK 17s81nzh Du 25 Ru 100, steel 20L, version U1
Valve SPPKR 17nzh84nzh Du 25 Ru 100, steel 12X18N9TL, version U1
Valve SPKK 17nzh81nzh Du 25 Ru 100, steel 12X18N9TL, version U1
Valve SPPK4R 17s90nzh Du 25 Ru 160, steel 20L, version U1
Valve SPPK4R 17ls25nzh Du 25 Ru 40, steel 20GL, version HL1
Valve SPKK4 17ls14nzh Du 25 Ru 40, steel 20GL, version HL1
Valve SPKK4R 17nzh25nzh Du 25 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh14nzh Du 25 Ru 40, steel 12X18N9TL, version UHL1
Valve SPPK4S 17ls14nzh Du 25 Ru 40, steel 20GL, version HL1
Valve SPPK4S 17nzh14nzh1 Du 25 Ru 40, steel 12X18N9TL, version UHL1Du (DN) 25 mm

Du (DN) 50 mm
Valve SPPK4R 17s6nzh Du 50 Ru 16, steel 20L, version U1
Valve SPKK4 17s7nzh Du 50 Ru 16, steel 20L, version U1
Valve SPKK4R 17nzh17nzh Du 50 Ru 16, steel 12X18N9TL, version U1
Valve SPKK4 17nzh13nzh Du 50 Ru 16, steel 12X18N9TL, version U1
Valve SPKK4R 17s21nzh Du 50 Ru 40, steel 20L, version U1
Valve SPKK4 17s23nzh Du 50 Ru 40, steel 20L, version U1
Valve SPKK4R 17nzh25nzh Du 50 Ru 40, steel 12X18N9TL, version U1
Valve SPKK4 17nzh14nzh Du 50 Ru 40, steel 12X18N9TL, version U1
Valve SPKK5R 17s16nzh Du 50 Ru 63, steel 20L, version U1
Valve SPKK5 17s16nzh1 Du 50 Ru 63, steel 20L, version U1
Valve SPKK4R 17nzh89nzh Du 50 Ru 63, steel 12X18N9TL, version U1
Valve SPKK4 17nzh85nzh Du 50 Ru 63, steel 12X18N9TL, version U1
Valve SPKK5R 17s8nzh Du 50 Ru 160, steel 20L, version U1
Valve SPKK5 17s8nzh1 Du 50 Ru 160, steel 20L, version U1
Valve SPPK4R 17nzh90nzh Du 50 Ru 160, steel 12X18N9TL, version U1
Valve SPKK4 17nzh80nzh Du 50 Ru 160, steel 12X18N9TL, version U1
Valve SPPK4R 17ls17nzh Du 50 Ru 16, steel 20GL, version HL1
Valve SPKK4 17ls13nzh Du 50 Ru 16, steel 20GL, version HL1
Valve SPPK4R 17ls25nzh Du 50 Ru 40, steel 20GL, version HL1
Valve SPKK4 17ls14nzh Du 50 Ru 40, steel 20GL, version HL1
Valve SPKK5R 17ls89nzh Du 50 Ru 63, steel 20GL, version HL1
Valve SPKK5 17ls85nzh Du 50 Ru 63, steel 20GL, version HL1
Valve SPPK5R 17ls90nzh Du 50 Ru 160, steel 20GL, version HL1
Valve SPKK5 17ls80nzh Du 50 Ru 160, steel 20GL, version HL1
Valve SPKK4R 17nzh17nzh Du 50 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh13nzh Du 50 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK4R 17nzh25nzh Du 50 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh14nzh Du 50 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK5R 17nzh16nzh Du 50 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK5 17nzh16nzh1 Du 50 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK5R 17nzh8nzh Du 50 Ru 160, steel 12Kh18N9TL, version UHL1
Valve SPKK5 17nzh8nzh1 Du 50 Ru 160, steel 12X18N9TL, version UHL1
Valve SPPK4S 17ls14nzh Du 50 Ru 40, steel 20GL, version HL1
Valve SPKK5S 17ls16nzh1 Du 50 Ru 63, steel 20GL, version HL1
Valve SPKK5S 17ls8nzh1 Du 50 Ru 160, steel 20GL, version HL1
Valve SPKK4S 17nzh14nzh1 Du 50 Ru 40, steel 12Kh18N9TL, version UHL1
Valve SPKK5S 17nzh16nzh1 Du 50 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK5S 17nzh8nzh1 Du 50 Ru 160, steel 12X18N9TL, version UHL1

Du (DN) 80 mm
Valve SPPK4R 17s6nzh Du 80 Ru 16, steel 20L, version U1
Valve SPKK4 17s7nzh Du 80 Ru 16, steel 20L, version U1
Valve SPKK4R 17nzh17nzh Du 80 Ru 16, steel 12X18N9TL, version U1
Valve SPKK4 17nzh13nzh Du 80 Ru 16, steel 12X18N9TL, version U1
Valve SPPK4R 17s21nzh Du 80 Ru 40, steel 20L, version U1
Valve SPKK4 17s23nzh Du 80 Ru 40, steel 20L, version U1
Valve SPKK4R 17nzh25nzh Du 80 Ru 40, steel 12X18N9TL, version U1
Valve SPKK4 17nzh14nzh Du 80 Ru 40, steel 12X18N9TL, version U1
Valve SPKK4R 17s89nzh Du 80 Ru 63, steel 20L, version U1
Valve SPPK4 17s85nzh Du 80 Ru 63, steel 20L, version U1
Valve SPKK4R 17nzh89nzh Du 80 Ru 63, steel 12X18N9TL, version U1
Valve SPKK4 17nzh85nzh Du 80 Ru 63, steel 12X18N9TL, version U1
Valve SPPK4R 17s90nzh Du 80 Ru 160, steel 20L, version U1
Valve SPKK4 17s80nzh Du 80 Ru 160, steel 20L, version U1
Valve SPPK4R 17nzh90nzh Du 80 Ru 160, steel 12X18N9TL, version U1
Valve SPKK4 17nzh80nzh Du 80 Ru 160, steel 12X18N9TL, version U1
Valve SPPK4R 17ls17nzh Du 80 Ru 16, steel 20GL, version HL1
Valve SPKK4 17ls13nzh Du 80 Ru 16, steel 20GL, version HL1
Valve SPPK4R 17ls25nzh Du 80 Ru 40, steel 20GL, version HL1
Valve SPPK4 17ls14nzh Du 80 Ru 40, steel 20GL, version HL1
Valve SPPK4R 17ls89nzh Du 80 Ru 63, steel 20GL, version HL1
Valve SPKK4 17ls85nzh Du 80 Ru 63, steel 20GL, version HL1
Valve SPPK4R 17ls90nzh Du 80 Ru 160, steel 20GL, version HL1
Valve SPKK4 17ls80nzh Du 80 Ru 160, steel 20GL, version HL1
Valve SPKK4R 17nzh17nzh Du 80 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh13nzh Du 80 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK4R 17nzh25nzh Du 80 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh14nzh Du 80 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK4R 17nzh89nzh Du 80 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh85nzh Du 80 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK4R 17nzh90nzh Du 80 Ru 160, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh80nzh Du 80 Ru 160, steel 12X18N9TL, version UHL1
Valve SPPK4S 17ls14nzh Du 80 Ru 40, steel 20GL, version HL1
Valve SPKK4S 17nzh14nzh1 Du 80 Ru 40, steel 12Kh18N9TL, version UHL1

Du (DN) 100 mm
Valve SPKK5R 17s6nzh Du 100 Ru 16, steel 20L, version U1
Valve SPKK5 17s7nzh Du 100 Ru 16, steel 20L, version U1
Valve SPKK5R 17nzh6nzh Du 100 Ru 16, steel 12X18N9TL, version U1
Valve SPKK5 17nzh7nzh Du 100 Ru 16, steel 12X18N9TL, version U1
Valve SPKK5R 17s21nzh Du 100 Ru 40, steel 20L, version U1
Valve SPKK5 17s23nzh Du 100 Ru 40, steel 20L, version U1
Valve SPKK5R 17nzh21nzh Du 100 Ru 40, steel 12X18N9TL, version U1
Valve SPKK5 17nzh23nzh Du 100 Ru 40, steel 12X18N9TL, version U1
Valve SPKK5R 17s16nzh Du 100 Ru 63, steel 20L, version U1
Valve SPKK5R 17s16nzh2 Du 100 Ru 63, steel 20L, version U1
Valve SPKK5 17s16nzh1 Du 100 Ru 63, steel 20L, version U1
Valve SPKK5 17s16nzh3 Du 100 Ru 63, steel 20L, version U1
Valve SPPK4R 17nzh89nzh Du 100 Ru 63, steel 12X18N9TL, version U1
Valve SPKK4 17nzh85nzh Du 100 Ru 63, steel 12X18N9TL, version U1
Valve SPKK5R 17s8nzh Du 100 Ru 160, steel 20L, version U1
Valve SPKK5R 17s8nzh2 Du 100 Ru 160, steel 20L, version U1
Valve SPKK5 17s8nzh1 Du 100 Ru 160, steel 20L, version U1
Valve SPKK5 17s8nzh3 Du 100 Ru 160, steel 20L, version U1
Valve SPPK5R 17ls6nzh Du 100 Ru 16, steel 20GL, version HL1
Valve SPKK5 17ls7nzh Du 100 Ru 16, steel 20GL, version HL1
Valve SPPK5R 17ls25nzh Du 100 Ru 40, steel 20GL, version HL1
Valve SPKK5 17ls23nzh Du 100 Ru 63, steel 20GL, version HL1
Valve SPPK4R 17ls89nzh Du 100 Ru 63, steel 20GL, version HL1
Valve SPKK4 17ls85nzh Du 100 Ru 63, steel 20GL, version HL1
Valve SPKK5R 17nzh6nzh Du 100 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK5 17nzh7nzh Du 100 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK5R 17nzh21nzh Du 100 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK5 17nzh23nzh Du 100 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK5R 17nzh16nzh Du 100 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK5R 17nzh16nzh2 Du 100 Ru 63, steel 12Kh18N9TL, version UHL1
Valve SPKK5 17nzh16nzh1 Du 100 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK5 17nzh16nzh3 Du 100 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK5R 17nzh8nzh Du 100 Ru 160, steel 12Kh18N9TL, version UHL1
Valve SPKK5R 17nzh8nzh2 Du 100 Ru 160, steel 12Kh18N9TL, version UHL1
Valve SPKK5 17nzh8nzh1 Du 100 Ru 160, steel 12X18N9TL, version UHL1
Valve SPKK5 17nzh8nzh3 Du 100 Ru 160, steel 12X18N9TL, version UHL1
Valve SPPK5S 17ls7nzh Du 100 Ru 16, steel 20GL, version HL1
Valve SPKK5S 17ls23nzh Du 100 Ru 63, steel 20GL, version HL1
Valve SPKK5S 17ls16nzh3 Du 100 Ru 63, steel 20GL, version HL1
Valve SPKK5S 17ls8nzh1 Du 100 Ru 160, steel 20GL, version HL1
Valve SPKK5S 17nzh7nzh1 Du 100 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK5S 17nzh23nzh1 Du 100 Ru 40, steel 12Kh18N9TL, version UHL1
Valve SPKK5S 17nzh16nzh1 Du 100 Ru 63, steel 12X18N9TL, version UHL1
Valve SPKK5S 17nzh8nzh1 Du 100 Ru 160, steel 12Kh18N9TL, version UHL1

Du (DN) 150 mm
Valve SPPK4R 17s6nzh Du 150 Ru 16, steel 20L, version U1
Valve SPKK4 17s7nzh Du 150 Ru 16, steel 20L, version U1
Valve SPKK4R 17nzh6nzh Du 150 Ru 16, steel 12X18N9TL, version U1
Valve SPKK4 17nzh13nzh Du 150 Ru 16, steel 12X18N9TL, version U1
Valve SPPK4R 17s21nzh Du 150 Ru 40, steel 20L, version U1
Valve SPKK4 17s23nzh Du 150 Ru 40, steel 20L, version U1
Valve SPKK4R 17nzh21nzh Du 150 Ru 40, steel 12X18N9TL, version U1
Valve SPKK4 17nzh23nzh Du 150 Ru 40, steel 12X18N9TL, version U1
Valve SPPK4R 17ls6nzh Du 150 Ru 16, steel 20GL, version HL1
Valve SPPK4 17ls73nzh Du 150 Ru 16, steel 20GL, version HL1
Valve SPPK4R 17ls21nzh Du 150 Ru 40, steel 20GL, version HL1
Valve SPKK4 17ls23nzh Du 150 Ru 40, steel 20GL, version HL1
Valve SPKK4R 17nzh6nzh Du 150 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh17nzh Du 150 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK4R 17nzh21nzh Du 150 Ru 40, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh23nzh Du 150 Ru 40, steel 12X18N9TL, version UHL1
Valve SPPK4S 17ls7nzh Du 150 Ru 16, steel 20GL, version HL1
Valve SPPK4S 17ls23nzh Du 150 Ru 40, steel 20GL, version HL1
Valve SPKK4S 17nzh7nzh1 Du 150 Ru 16, steel 12Kh18N9TL, version UHL1
Valve SPKK4S 17nzh23nzh1 Du 150 Ru 40, steel 12Kh18N9TL, version UHL1
Valve SPKK4R 17s6nzh Du 150 Ru 16 M1, steel 20L, version U1
Valve SPKK4 17s7nzh Du 150 Ru 16 M1, steel 20L, version U1

Du (DN) 200 mm
Valve SPPK4R 17s17nzh Du 200 Ru 16, steel 20L, version U1
Valve SPPK4 17s13nzh Du 200 Ru 16, steel 20L, version U1
Valve SPKK4R 17nzh17nzh Du 200 Ru 16, steel 12X18N9TL, version U1
Valve SPKK4 17nzh13nzh Du 200 Ru 16, steel 12X18N9TL, version U1
Valve SPPK4R 17ls17nzh Du 200 Ru 16, steel 20GL, version HL1
Valve SPKK4 17ls13nzh Du 200 Ru 16, steel 20GL, version HL1
Valve SPKK4R 17nzh17nzh Du 200 Ru 16, steel 12X18N9TL, version UHL1
Valve SPKK4 17nzh13nzh Du 200 Ru 16, steel 12X18N9TL, version UHL1
Valve SPPK4R 17s17nzh Du 200 Ru 16 M1, steel 20L, version U1
Valve SPKK4 17s13nzh Du 200 Ru 16 M1, steel 20L, version U1