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API 6D Check Valve Trim

API 6D Check Valve Trim

API 6D Check Valve Trim

(OP)
Does anyone know the "standard" trim for API 6D check valves?  I'm used to B31.3 specs where we typically specify API Trim #8 but I'm being told that is not the case for API 6D valves.  Can anyone shed some light on this?

(This is for non-corrosive, sweet service.)

RE: API 6D Check Valve Trim

As per API 6D/ISO 14313, you are at the mercy of the valve manufacturer's recommendations. Get the recommendations and have them reviewed by a corrosion engineer.

Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
 

RE: API 6D Check Valve Trim

(OP)
Do you happen to have the paragraph that's from?  I can find it, but that would speed things up.

I'm not worried about corrosion, frankly, because of the nature of the service.  It's about as benign as you can get, but my client is searching for anything and everything to keep costs down and consequently I need to specify the least expensive valves I can while still maintaining the integrity of the system.

RE: API 6D Check Valve Trim

(OP)
Thanks very much.

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