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liquid trim

liquid trim

liquid trim

Hi. I am trying to figure out what a "liquid trim" is. Can some1 please help and/or let me know about a site where I can see a picture of one.


RE: liquid trim

In a relief valve it allows the blow down to be controlled. The ASME code does not address blowdown for a liquid valve but due to customer's demands a "liquid trim" was developed. Basically the nozzle ring has a different angle and the huddle champer will be different from a vapor valve. Each manufacturer will attack the problem with their own design of these two areas.

RE: liquid trim

Liquid trim in pressure relief valves was developed to meet the ASME Section VIII capacity certification requirements at 10% overpressure.  Prior to liquid trim, the same valve was used for liquids and gas.  Full lift on liquids service was achieved at pressures above 10% overpressure, usually around 25%.  The liquid trim assured full lift by 10% overpressure.  Blowdown can be adjusted in some models.  Some liquid trim valves are also certified for gas service but the blowdown is usually longer.  For services where either a gas or liquid must be relieved, or for some two-phase applications the liquid trim may provide better performance if a longer blowdown on gas is acceptable.

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