Swing Check Valve：
（1）Size：NPS 2～NPS 24、DN50～DN600
（2）Pressure：Class150～Class900、PN16～PN160
（3）Material：Carbon Steel, Stainless Steel, Alloy, Duplex Alloy
（4）Application: for petroleum, natural gas, petro-chemical industries.
1、Design and manufacturing：
API 6D, BS1868, GOST, GB
2、Face to Face:
ASME B 16.10, GOST, GB
3、Flange Dimension:
ASME B 16.5, GOST, GB
4、Inspection and Test：
API 598、API 6D, GOST, GB
5. Main Materials
A216 WCB、WCC; A217 WC6、WC9、C5、C12、C12A、CA15; A351 CF8、CF8M、CF3、CF3M、CF8C、 A352 LCB、LCC; 20Л, 20ГЛ, 12Х18Н9ТЛ, 12Х18Н12М3ТЛ, etc.
6. Features:
（1）Small hammer pressure, disc with short travel
（2）Small open and close pressure, longer life time, reliable performance.
Main Parts and Materials:
No | Part | Material | ||||
WCB/Trim 1 | WCB/Trim 5 | WCB/Trim 8 | Stainless Steel | Stainless Steel | ||
1 | Body | ASMT A216 WCB | ASTM A351 CF8/ 12Х18Н9ТЛ | ASTM A351 CF8M/ 12Х18Н12М3ТЛ | ||
2 | Seat | A105+13Cr
| A105+STL
| A105+STL
| ASTM A351 CF8+STL/ 12Х18Н9ТЛ+STL | ASTM A351 CF8M+STL/ 12Х18Н12М3ТЛ+STL |
3 | Disc | ASTM A216WCB+13Cr
| ASTM A216WCB+STL | ASTM A216WCB+13Cr
| ASTM A351 CF8+STL/ 12Х18Н9ТЛ+STL | ASTM A351 CF8M+STL/ 12Х18Н12М3ТЛ+STL |
4 | Arm | ASTM A216 WCB | ASTM A216 WCB | ASTM A216 WCB | ASTM A351 CF8 | ASTM A351 CF8M |
5 | Nut | ASTM A194 2H | ASTM A194 2H | ASTM A194 2H | ASTM A194 8 | ASTM A194 8M |
6 | Pin | ASTM A182 F6a | ASTM A182 F6a | ASTM A182 F6a | ASTM A182 F304 | ASTM A182 F316 |
7 | Arm Yoke | ASTM A216 WCB | ASTM A216 WCB | ASTM A216 WCB | ASTM A351 CF8 | ASTM A351CF8M |
8 | Nut | ASTM A194 2H | ASTM A194 2H | ASTM A194 2H | ASTM A194 8 | ASTM A194 8M |
9 | Stud | ASTM A193 B7 | ASTM A193 B7 | ASTM A193 B7 | ASTM A193 B8 | ASTM A193 B8M |
10 | Screw | ASTM A193 B7 | ASTM A193 B7 | ASTM A193 B7 | ASTM A193 B8 | ASTM A193B8M |
11 | Gasket | 304+Flexible Graphite | 304+Flexible Graphite | 304+Flexible Graphite | 304+Flexible graphite | 304+Flexible graphite |
12 | Bonnet | ASTM A216 WCB | ASTM A216 WCB | ASTM A216 WCB | ASTM A351 CF8 | ASTM A351 CF8M |
13 | Lift Hinge | ASTM A181 | ASTM A181 | ASTM A181 | ASTM A181 | ASTM A181 |
Note: Alternative materials for valve parts can be provided according to customer’s inquiry.
