Natural Gas Pipeline Automatic Blowout Preventing Safety Valve (BOP)

We are professional in design, manufacturing and sales of equipments for oil and gas production and transportation. We supply leading Products for gas well and pipeline transportation.

ZAF series sprayproof automatic safety valve System Features:
Simple structure without any additional control accessory;
No need power consumption;
Fully automatic foolproof safety valve;
Excellent reliable & high stability;
Easy installation and maintenance;
Splendid sealability and corrosion resistant;
Durable for 5 years;
Ideal for natural gas well or gas pipeline;
Meet the standard of flinge connection: SY/T5127-2002.
We can also adjust the unit according to customers' requirement.

Available Conditions
Suitable medium temperature: -20'C ~ +380'C
Operating pressure: 0.05MPa~105MPa
Gas flow: 0~100 X 10^4 m^3/d
H2S content: 200G/M^3
CO2 content: 230G/M^3

Operation Instruction
Take operation on high pressure gas well as an example:
Conncet ZAF sprayproof automatic safety valve betweeen two channel gates of the gas well. When gas enters the left channel, the valve ball (6) is pushed back by low pressure, leaves the front valve seat (5), and comes into the right channel. The valve opens and the production begins normally.

When more gas enters, the pressure on the valve ball (6) becomes higher, the controll spring (4) is compressed and has the valve ball (6) to move right. So long as the gas flow that passes the channel is lower than the standard limit, the safety valve keeps open and the gas production goes on normally.

If the pipeline behind the safety valve leaks, the gas flow to pass the channel increases fastly, and surpasses the standard limit, the valve ball pushed by gas pressure will conquer the spring and move into the back valve seat (8). And the safety valve shuts down the pipeline automatically.

Following accident solved, pipeline re-connected and pipeline gate re-opened, the gas pressure recovers, so the valve ball (6) leaves the back valve seat (8) and is resetted by the spring power (7). The production continues again.
If the pipeline ahead of the safety valve leaks, under the pressure the spring (4) will push the valve ball (6) to move ahead left and shut the pipeline automatically.

In particular cases: If the valve ball (6) cannot reset after accident is solved, just shut down the left channel and rotate the pressure reductor (7) to decrease the gas pressure in the left channel. And the valve will open the pipiline.