Product Features

Joint research and development of domestically produced key equipment for oil and gas pipelines by China National Petroleum Corporation

The General Administration of Quality Supervision, Inspection and Quarantine of China has issued a TS-A gas pressure regulating valve manufacturing license

※ Valve body straight through (axial flow) with high flow rate and low noise, flow rate<50m>50m><80db>80db>

※ Large adjustment range, high adjustment accuracy, and durability

※ Standard on-site valve position indicator

※ Can be equipped with valve position sensing transmitter

※ Can be equipped with export variable diameter noise reduction device and internal noise reduction device

Product parameters

Standard execution	EN 334
nominal pressure	CLass150 ～ CLass1500 （ 2MPa - 26MPa）
Nominal size	DN25 ～ DN300 （NPS 1〞 ～ NPS 12〞）
Connection method	Flange ANSI B16.5 RF, RTJ
Design Temperature	-29℃ ～ 60℃ ； - 46℃ ～ 60℃
Maximum inlet pressure	15MPa (can be lower than this value according to the flange grade)
Export pressure range	0.1MPa～11MPa
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	0.5MPa
Explosion proof/protection level	Not lower than ExdIIBT4, IP65
Main materials	Main valve body forged steel A 105 A 350 LF2 Commander shell forged steel, forged aluminum Internal components made of stainless steel, steel, copper, aluminum, 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 network is stabilized by the pre controller and enters the control controller. After the control controller regulates the pressure, it outputs the load pressure into the rear chamber of the valve, 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, which is fed back to the control commander through the measurement pipeline, causing the control commander to lose balance. The output load pressure decreases, and the balance inside the pressure regulating valve is also broken. The diaphragm, under the action of the spring and feedback pressure, reduces the valve opening 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 downstream feedback pressure decreases, and the actions of each part are opposite.

Product Structure Diagram

Commander Structure Diagram

Product dimension diagram

Size Connection

Connection size of pressure sampling point piping

Installation position of pressure sampling point

As shown in Figures 3 and 4, 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 or PV)

Product ordering and selection

Selection of pressure regulating valve

Commander selection

Other special configuration requirements

*If you need to select an export variable diameter noise reduction device and an internal noise reduction device, please indicate the model as GPR-A20b, and other options are the same as above.