Standard
Design and Manufacture: ASME B16.34, API 609
Face to face(end to end): API 609,MFG or customers
Flanged connection: 2"~24" to ASME B16.5, 22", 26"~36" ASME B16.47( MSS-SP-44 or to API605)on Request
Test and inspection: API598, API609
Butt welded end: ANSI B16.5 
Operation type
Lever,,Gear, Electric actuator,Pneumatic actuator,Bare stem.
Material
ASTM A216 WCB WCC;ASTM A217 WC1 WC6 WC9;ASTM A351 CF8,A351 CF8M,
A351 CF3,A351 CF3M,A351 CN7M;.ASTM A352 LC1 LCB LCC LC3 or by customers
(Cast Steel, Alloy Steel, Stainless Steel, Special Steel)
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