Seat Leakage for three way valve

[trentar]

Hay
ist there some special standard which describes seat leakage measurement for three way valve or should I use standard for two way valve like -ASME B16.34, -ANSI FCI 70-2, -EN 1349, -EN 12266-1, -IEC 60534-4?

Thanks

 

[bcd]

No specific standard for testing 3-way valve. Use 2-way standard like API 598, ISO 5208, MSS SP-61.