Product Features

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

The German TUV certification safety integrity level SIL-3 complies with IEC 61508 and IEC 61511

The drafting unit of the industry standard for "Safety shut-off valves for gas pressure regulating devices" by the Ministry of Machinery Industry of China

The General Administration of Quality Supervision, Inspection and Quarantine of China has issued a TS-A safety shut-off valve manufacturing license

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

The top mounted structure can be repaired online, and the replacement of valve components does not require the removal of the valve body

The standard configuration includes self operated overpressure cut-off and self operated undervoltage cut-off functions

※ Optional configuration includes manual button cut-off and remote ESD linkage cut-off function

Product parameters

Standard execution	EN 14382 ， Q/12WQ 5192
nominal pressure	CLass150 ～ CLass900 （ 2.0MPa - 15MPa）
Nominal size	DN25 ～ DN400 （NPS 1〞 ～ NPS 16〞）
Connection method	Flange ANSI B16.5 RF, RTJ
Design Temperature	-29℃ ～ 60℃ ； - 46℃ ～ 60℃
Cutting accuracy	±1%（AG1）， ±2.5%（AG2.5）， ±5%（AG5）
response time	0.5s ～1s
Explosion proof/protection level	Not lower than ExdIIBT4, IP65
Main materials	Main valve housing cast steel A 216 WCB A 352 LCC Commander casing made of cast steel, forged steel, and 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

A safety shut-off valve is a safety protection device in a pressure regulating device. When the pressure at the outlet of the device rises or falls due to reasons and reaches the cut-off set value, it will automatically cut off the gas source, thereby protecting downstream pipelines and equipment from damage. In emergency situations, on-site and control room operators can also use manual buttons or remote ESD linkage functions to forcibly close the safety shut-off valve.

Product Structure Diagram

Commander Structure Diagram

Product dimension diagram

Size Connection

SSV - A400a DN25 - DN200

SSV - A400a DN250 - DN400

Connection size of pressure sampling point piping

Installation position of pressure sampling point

As shown in Figures 1 and 2, the pressure sampling point of the safety shut-off valve (SSV) is located 5-8 times the diameter of the pipeline behind the working valve (PCV or PV).

Product ordering and selection

Selection of cut-off valve

Commander selection

Other special configuration requirements