Pneumatic on-off valve for liquid ammonia
Abbreviated to: pneumatic on-off valve for liquid ammonia, pneumatic emergency shut-off valve, liquid ammonia emergency shut-off valve, pneumatic ammonia on-off valve
Model: QDQ421F-40C QDQ421F-40P
Overview of pneumatic liquid ammonia special on-off valve:
Liquid ammonia is special pneumatic switch valve. It belongs to Ammonia cut off valve series pneumatic ammonia dedicated switch valve product, which is composed of a straight stroke piston pneumatic actuator and a liquid ammonia stop valve. The valve is opened and closed through the explosion-proof solenoid valve to control the input and output of air source pressure.
Performance characteristics of pneumatic on-off valve:
1. Working pressure: 1.6Mpa-4.0Mpa
2. Working temperature: - 30~+80 ℃
3. Drive mode: pneumatic, pneumatic with manual
4. Connection mode: flange
5. Manufacturing standards: GB, JB, HG
6. Manual operating mechanism can be installed on the top
7. Supporting accessories: explosion-proof solenoid valve, air filter pressure reducing valve, signal feedback (travel switch), ≥+80 ℃ fuse
The structure of the special pneumatic on-off valve for liquid ammonia belongs to the single action (normally closed) liquid ammonia cut off valve. The type of pneumatic liquid ammonia stop valve is: the direction of the fluid medium is high in and low out, the pressure bearing position is high, the medium is output from the upper direction of the valve disc, and the soft material sealing ring is embedded in the valve disc or fixed on the valve disc with the pressure ring. Since the soft seal stop valve can easily achieve the sealing effect and ensure zero leakage, once it is open, there will be no contact between the valve seat and the sealing surface of the valve disc, the medium will not wash the sealing surface, and the wear of the sealing surface is very small.
