Wafer Single Disc Check Valve
afer single disc check valve is a kind of check valve with one disc and wafer connection, which allows the medium flow only in one direction in order to prevent accidents. 
Standard: GB, API, ASME
Nominal Diameter: 1/2"-8", DN15-DN200
Pressure: PN10-PN40, 10bar-40bar, 1.0MPa-4.0MPa
Connection: Wafer
Main Material: A216 WCB, A351 CF8M, INCONEL, A182 F304, A182 F316 etc.

 Wafer double disc check valve
  Wafer double disc check valve is a kind of check valve with two discs and wafer connection, which allow the medium flow only in one direction in order to prevent accidents. 
Standard: API, ASME
Nominal Diameter: 2"-48", DN50-DN1200
Pressure: Class 150Lb, Class 300Lb, Class 600Lb, Class 900Lb, Class 1500Lb
Connection: Wafer
Main Material: A216 WCB, A351 CF8M, INCONEL, A182 F304, A182 F316 etc.

 API check valve
   API check valve is a kind of check valve made according to API standard, which allow the medium flow only in one direction in order to prevent accidents.
Standard: API, ANSI
Nominal Diameter: 1 1/2"-20", DN40-DN500
Pressure: Class 150Lb, Class 300Lb, Class 600Lb
Connection: Flange
Main Material: A216 WCB, A217 WC9, A351 CF8M, PTFE etc.

Thread swing check valve
  Thread swing check valve is a kind of check valve with thread connection, which allows the medium flow only in one direction in order to prevent accidents.
Standard: GB
Nominal Diameter: 1/2"-3", DN15-DN75
Pressure: PN25, 25bar, 2.5MPa
Connection: Thread
Main Material: A351 CF8, A182 F304, A182 F316, PTFE etc.