Non Slam Check Valve Seat Leakage Classification 2

[MSanchez]

Im trying to determine what seat class would be the best to use on a non slam check valve. The service is CO2 on the discharge of a compressor. The design conditions for this valve are 270 F / 1113 psig and will have a max flow rate of 38190 lbs/hr.

 

[gerhardl]

What does the commercial available suppliers suggest? What is their best commercial avaialable proposal?

 

[stanier]

The seat valve classification is only good on the day the valve was tested. one transported and installed your classification is a myth.

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---B.B. King

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[gustorf]

API 598 is a common classification making differences between soft sealing and metal-to-metal sealing check valves.
EN 12266 gives different leackage classes.
A metal-to-metal sealing non-slam (nozzle) check valve should guarantee class C in acc. with EN 12266

 

[nmiller127]

What style of compressor are you using (reciprocating, centrifugal, etc.)? Gustorf is right on with the API 598 seat leakage classifications for check valves. What size of valve are you looking at using?

nmiller127

 

[hsbcn]

hi MSanchez: what are the temperature-pressure conditions?

My focus is on valve stockists in the us and uk who supply duplex and super duplex valves, and inconel and hastelloy valves, plus titanium, alloy 20 and 904L valves.