■ Manufacturing Acceptance criteria: 

 ◆ manufacturing conditions of acceptance for the valve according to the Japanese standard of 101 with the provisions of thermal power; 
 ◆ valve structure length according to the provisions of E101: 
 ◆ body weld groove by ANSI, B16 · regulations or by the size of users. 


 ■ Specification for 

 Shell material for temperature (℃) for medium 
 ASTM A216 WCB ≤ 524 steam 
 Water 
 ASTM A217 WC1 ≤ 450 
 ASTM A217 WC6 ≤ 550 
 ASTM A217 WC9 ≤ 590 

 ■ Major parts material 

 Part Name Material Grade 
 Body WCB WC1 WC6 WC9 
 Gate WCB WC1 WC6 WC9 
 Valve cover 25 15CrMoVA 12CrMo1VA 12CrMo1VA 
 WCB WC1 WC6 WC9 
 Seat 25 15CrMoVA 12CrMo1VA 12CrMo1VA 
 Stem 1Cr17Ni2 1Cr17Ni2 SUH600 SUH600 
 12Cr1Mo1VA 12Cr1Mo1VA 
 Reinforced Flexible Graphite Filler 
 Bracket WCB WCB WCB WCB 
 WC1 WC6 WC9 
 S mild steel seal ring (reinforced flexible graphite) S F mild steel mild steel 
 Stem nut 45 (ZCuZn25A16Fo3Mn3)