working principle:

Under the normal operation condition of the system, the cylinder pushes the isolation valve to open under the action of high-pressure gas; after the high temperature (such as 70 ° C), spark and flue gas produced by the vessel ignition are captured by the front-end detection device, the signal is fed back to the controller, after the controller recognizes the signal, the transformed electrical signal drives the relay, and the relay closes the control solenoid valve, making the air source generate 0.6 MPa pressure acts on the cylinder and closes the isolation valve instantly, so as to prevent the flame from spreading to the downstream pipeline and equipment and play the role of isolation.

As a kind of passive device, the pneumatic one-way flap isolation valve is used in the situation that the pipeline / container is easy to catch fire. According to working conditions, it can be used for dust explosion-proof and fire-proof isolation at the same time.

Product features and advantages:

1. Material: carbon steel or stainless steel;

2. Applicable to: flammable liquid, gas, dust, steam and miscellaneous substances;

3. Applicable to the maximum explosion relief pressure value: 0.5bar:

4. Signal detection mode: temperature signal control, spark signal control, flue gas signal control, pressure signal control;

5. Optional self-locking mechanism; manual reset to prevent flashback, safe and reliable;

6. Optional position sensor, interlock the linkage equipment when it is closed;

7. Horizontal installation, negative or positive pressure system, one-way isolation;

8. Size: dn100-dn1000o

Specification and parameters of pneumatic one-way flap isolation valve