Trim No. and Leakage Rate in Globe / Gate valves
Trim No. and Leakage Rate in Globe / Gate valves
(OP)
Is there any relationship between trim no. specified in API 600 and leakage rate specified by DIN 3230-3 or any other standards in a globe or gate valve?
Thanks.
Thanks.





RE: Trim No. and Leakage Rate in Globe / Gate valves
RE: Trim No. and Leakage Rate in Globe / Gate valves
Leakage rate is determined by: type of seating i.e, soft-seated or metal-seated; type of valve i.e. gate, check, high performance butterfly, etc; surface finish; and other factors.
RE: Trim No. and Leakage Rate in Globe / Gate valves
API 6A/598
for leakage rates.
RE: Trim No. and Leakage Rate in Globe / Gate valves
ANSI CLASS Class III
Maximum Seat Leakage 0.1% of rated valve capacity Test Conditions
Air or water @ 50 - 125 F. 45 - 60 psig or Maximum operating differential pressure whichever is less
ANSI Class IV Maximum Seat Leakage 0.01% of rated valve capacity Test Conditions
Air or water @ 50 - 125 F. 45 - 60 psig or Maximum operating differential pressure whichever is less
ANSI Class VI Maximum Seat Leakage 1" Port Diameter
0.15 ml per minute or 1 bubble per minute
Test Conditions
Air or Nitrogen @ 50 - 125 F 50 psig or Maximum operating differential pressure whichever is less
Simplified Chart for most popular leakage classes. For complete specifications refer to ANSI/FCI 70-2
This should at least give you a start on leakage classifications.