API 6D vs 594 swing check valve

[JimmyLu]

If manufacture the 42" 150lb swing check valve which (6D/594) standard is applicable ?

42" swing check valve Face to Face End to End dimensions is not defined directly in table .

Design : API 6D / 594 ?
Face to Face : By agreement
Wall thickness : ASME 16.34
Flange End : ASME B16.47 Series B
Test : API 598
Lever & Counterweight : BS1868

Is this applicable to purchase a correct valve ?

 

[Chiuzzo]

API594 is typically for compact checks and FTF is very short (wafer type). API6D is better for a pipeline check valve. Ciao!