Origin	China
Model Number	ZAF
Brand Name	Wantai
Material	Stainless Steel
Media	Gas
Power	no need power consumption
Pressure	High Pressure
Standard or Nonstandard	Standard
Structure	Safety
Temperature of Media	High Temperature

System Features:

Fully automatic foolproof safety valve;

Ideal for natural gas well or gas pipeline;

Simple structure without any additional control accessory: no leakage accidents caused by hydraulic or electric chonrol valve error & no need power consumption;

Made by stainless steel meeting with the top specification of API standards;

Valve ball and seat made of  Nano ceramet for excellent gas washing-out and corrosion resistant:

Reliable & high stability, easy installation and maintenance, durable for 5 years;

Meet the standard of flinge connection: SY/T5127-2002.

We can also adjust the unit according to customers’ requirement.

Available Conditions

Suitable medium temperature: -20ºC~ +380ºC

Operating pressure: 0.05MPa~105MPa

Gas flow: 0~100×10⁴ m³/d

H₂S content: 200g/m³

CO₂ content: 230g/m³

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.