Is it not acceptable to use a safety valve with a small diameter? But what problems could arise if the diameter is set too large? Larger in diameter than the safety valves of the pressure sources
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Is it not acceptable to use a safety valve with a small diameter? But what problems could arise if the diameter is set too large? Larger in diameter than the pipes of the pressure source’s main lines
If it’s too small, it will jump; will it jump frequently if it’s too large?
If the size is too small during takeoff, the excess pressure cannot be discharged, causing the equipment to remain under overpressure, which poses a risk. When it gets larger, after taking off, it may cause the valve to operate frequently, thereby reducing its service life
What could be the reason for the valve to flicker frequently when it is in the open position?
The discharge capacity of a safety valve needs to be calculated based on various operating conditions. It’s not the case that a larger diameter than that of the feed main pipe means the selected model is too large; it shouldn’t be viewed that way. You need to calculate the emissions for various operating conditions and select the highest value, so as to determine the appropriate diameter.
There’s hardly any downside to using a slightly larger safety valve; the only drawback is that it costs a bit more
Will being too large cause the instantaneous pressure to drop?
A safety valve is a safety mechanism, not a regulating mechanism. Rapid relief after overpressure achieves the purpose of safety. It cannot be used as a regulating valve. When the pressure exceeds the set limit, it releases some pressure and then returns to its original state; when the pressure exceeds that limit again, it triggers once more. Using a safety valve as a regulating valve can cause it to malfunction. Failure to release pressure in such cases can be dangerous