AS-R self-operated safety shut-off valve
◎ AS-R self-operated safety shut-off valve working principle
The safety shut-off valve controls the pilot (pilot valve) action by the outlet pressure, thereby achieving the function of shutting off the gas to the downstream. "Overpressure cut" The function is that when the pressure at the downstream signal collecting point of the safety shut-off valve for the gas pressure regulating device exceeds the range set by the spring, The pressure signal at the gathering point is fed back to the pilot (pilot valve), causing the pilot (pilot) piston to move upward, thereby causing the lever to trip, the weight to impact the striker downward, and the striker moving downward to disengage the hook from the flap , The flap closes the valve downwards, shutting off the downstream flow of the gas and protecting the downstream equipment and pipeline.
The function of “undervoltage cutoff” means that when the pressure at the signal collection point downstream of the safety shut-off valve is lower than the range set by the spring, the pressure signal at the collection point is fed back to the pilot (pilot valve) to make the pilot (pilot valve) The piston moves downward, so that the pull rod is tripped, the weight impacts the striker downward, and the striker moves downward so that the hook and the flap are disengaged, and the flap closes the valve downward. Thereby cutting off the downstream transportation of the gas and protecting the safety of downstream equipment and pipelines.
◎ Main features of AS-R self-operated safety shut-off valve
1, full-path structure, the pressure drop is small.
2, easy to repair, online replacement of valve parts, and fewer parts.
3. With integrated pressure balance valve.
4. Optional remote control and remote indication of valve position.
5. The cutting response has high precision.
6. The maximum flow rate is less than 80m/s.