Steam pressure reducing valve
Thread Content
Our company uses steam on an intermittent basis; the workshops often experience sudden stops or starts in steam usage. The safety valves installed on the steam pipelines frequently activate. Pressure regulators have been installed to prevent pressure from exceeding safe levels, so why do the safety valves still activate? How should this problem be solved?
There must be a user after the pressure relief valve.
The pressure reduction amount does not meet the pressure requirements before reduction
Can a pressure relief valve still provide pressure reduction even when there is no user downstream of it?
It is possible that the pressure after depressurization is too high, and does not reach the required pressure! Check the pressure after pressure reduction by the pressure relief valve, as well as the setting pressure of the safety valve. Ensure that the pressure does not exceed this value; if it does reach the pressure at which the safety valve operates, then the safety valve will activate in case of a fault! It is recommended to investigate the specific cause!
You don’t understand the function of the pressure relief valve; reducing steam pressure is achieved by adding water. Using something that has been disabled suddenly will definitely cause sudden drops and increases in pressure; how can a pressure relief valve be sensitive in such a situation? Otherwise, it can’t be called safe
It’s likely that there’s a problem with your safety valve; even without a pressure regulator downstream, it will maintain the pipeline pressure you set, preventing overpressure
The pressure relief valve reduces the pressure downstream of the valve, ensuring that this pressure does not exceed the set value. Your sudden shutdown has nothing to do with the pressure relief valve; such a sudden shutdown can indeed cause the system pressure to rise, leading to the safety valve activating. Generally, it is necessary to contact in advance before turning the steam on or off before use
What’s not in use on the downstream side of the steam pressure relief valve is still under pressure! You should design a vent on the back side to release pressure when it’s high, but that’s very wasteful!
The safety valve activates unintentionally when the set pressure is reached; it’s necessary to check whether the pressure behind the pressure regulator has already reached that set pressure. It is recommended to adjust the setting of the safety valve more strictly. Our installation has encountered this problem with the safety valve’s set pressure on two occasions, which led to the valve activating
Equipped with a self-acting pressure reducing valve; the valve is opened and closed by adjusting the spring pressure