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GPR-S200 series self operated gas pressure regulating valve
Product application ※ Suitable for pressure regulating devices in long-distance natural gas pipeline distribution stations, station self use gas press
Product details
Product Features
※ High voltage differential stable operation
※ Simple structure, easy maintenance, and upkeep
※ Can be used as either a monitoring valve or a working valve for two functional options
※ Simple pressure setting, high adjustment accuracy, and wide flow range
※ Large adjustment range, high adjustment accuracy, and durability
※ Standard on-site valve position indicator
※ Can be equipped with valve position sensing transmitter
Product parameters
| Standard execution | EN 334 |
| nominal pressure | Class300 ～ Class600 （ 5MPa - 10MPa） |
| Nominal size | DN25 ～ DN150 （NPS 1〞 ～ NPS 6〞） |
| Connection method | Flange ANSI B16.5 RF, RTJ |
| Design Temperature | -29℃ ～ 60℃ ； - 46℃ ～ 60℃ |
| Maximum inlet pressure | 10MPa (can be lower than this value according to the flange grade) |
| Export pressure range | 0.1MPa～5MPa |
| Accuracy level AC | ±1%（AC1）， ±2.5%（AC2.5）， ±5%（AC5） |
| Close pressure level SG | 2.5%（SG 2.5）， 5%（SG5）， 10%（SG10） |
| Close pressure zone level SZ | 2.5% （SZ2.5） |
| Minimum pressure difference between inlet and outlet | 0.2MPa |
| Maximum pressure difference between inlet and outlet | 7.0MPa |
| Explosion proof/protection level | Not lower than ExdIIBT4, IP65 |
| Main materials | Main valve body cast steel A 216 WCB A 352 LCC Commander shell forged steel Internal components made of stainless steel Close the spring steel (X750, A276316) Sealing material reinforced polytetrafluoroethylene, nitrile rubber, synthetic rubber |
Working principle
Gas pressure regulating valve is a pressure control device in the pressure regulating device. The inlet pressure of the pipeline enters the diaphragm upper chamber and the control commander after passing through the flow limiting valve. The diaphragm upper chamber and the control commander are connected in series. After the control commander regulates the pressure, the pressure in the diaphragm upper chamber is output to the valve rear chamber. The pressure at the inlet end of the diaphragm lower chamber pushes the diaphragm, overcomes the spring force, opens the valve port, and achieves pressure reduction and stable flow output.
When the downstream gas consumption decreases, the feedback pressure after the pressure regulating valve increases, and it is fed back to the control commander through the measurement pipeline, causing the control commander to lose balance. The output pressure decreases, and the balance inside the pressure regulating valve is also broken. The diaphragm moves downward under the action of the spring and load pressure, and the valve opening decreases or even closes, causing the outlet pressure of the pressure regulating valve to drop back to the set pressure value.
When the downstream gas consumption increases, the feedback pressure after the pressure regulating valve decreases, and it is fed back to the control commander through the measurement pipeline, causing the control commander to lose balance. The output pressure increases, and the balance inside the pressure regulating valve is also broken. The pressure in the lower chamber of the diaphragm pushes the diaphragm, overcomes the spring force, and increases the valve opening to meet the downstream demand of the pressure regulating valve.
Product Structure Diagram
Commander Structure Diagram
Product dimension diagram
Size Connection
Weight (kg)
Valve rated flow coefficient KG and maximum flow calculation
Connection size of pressure sampling point piping
Installation position of pressure sampling point
As shown in Figure 3, the pressure sampling point of the gas pressure regulating valve (PCV) is located 5-8 times the diameter of the pipeline behind the working valve (PCV)
Product ordering and selection
Selection of pressure regulating valve
Commander selection
Online inquiry
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