Safety shut-off valve PZK

Safety shut-off valve PZKSafety shut-off valves PZK are designed to shut off automatically the non-aggressive hydrocarbon gases flow.
Valves shut off automatically when the monitored pressure is out of the both upper and lower limits. Valve opening is manual. The spontaneous opening of the valve without personnel is excluded.

The valves are made of ambient class "UZ" GOST 15150 (operating in moderate climate indoors with natural ventilation, temperature from -40 to +45¬°C). Typical sizes of nominal inside diameters are DN 50, DN 100, DN 200 of low or high monitored pressure.

PZK:
fundamentally new design of the device and the lack of external actuators excludes false triggering of the valve;

design of the device excludes the offset of the operation valve respective to the seat;

minimum amount of the friction parts of ball valve improves the accuracy and reliability of working;

design of locking mechanism is tested successfully for several years in the cut-off valves in the pressure regulator RDK.
 

PZK valves' specifications

 

Parameter

PZK-50N

PZK-50V

PZK-100N

PZK-100V

PZK-200N

PZK-200V

Actuating medium

natural gas
GOST 5542

natural gas
GOST 5542

natural gas
GOST 5542

natural gas
GOST 5542

natural gas
GOST 5542

natural gas
GOST 5542

Nominal diameter, DN, mm

50

50

100

100

200

200

Maximum inlet pressure, MPa

1.2

1.2

1.2

1.2

1.2

1.2

Controlled pressure settings limits:
- when pressure decreases, MPa

- when pressure increases, MPa

0.0003-0.003
0.002-0.075

0.003-0.03
0.03-0.75

0.0003-0.003
0.002-0.075

0.003-0.03
0.03-0.75


0.0003-0.003
0.002
-0.075


0.003-0.03
0.03-0.75

Actuating accuracy, %, not more than

2

5

2

5

2

5

Leakage class

"A" according to GOST 9544

"A" according to GOST 9544

"A" according to GOST 9544

"A" according to GOST 9544

"A" according to GOST 9544

"A" according to GOST 9544

Construction length, mm

230±1.5

230±1.5

350±2

350±2

600±2

600±2

Overall dimensions, not more than:
- length, mm

- width, mm

- height, mm


330
265
480


330
265
480


360
300
600


360
300
600


600
390
795

 

600

Pipeline connection

flanged
GOST 12817

flanged
GOST 12817

flanged
GOST 12817

flanged
GOST 12817

flanged
GOST 12817

flanged
GOST 12817

Mass, kg, not more than

31.5

31.5

52.5

52.5

31.5

141

Shut-off valves PKN, PKV - the basic specifications: