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Check valve

Thin Type Wafer Single Disc Swing Check Valve

Check valves is usually installed in pipeline system,prevent medium from flowing back.check valve is automatic valve that it is opened and closed by pressure of fluid.In the past, we use H44 flange coupling swing type check valves&H44 flange coupling lift type check valve.Traditional check valve's volume is big,strong resistance of fluid,Water-hammer's pressure is high when valves close,repair and installation is inconvenient,service life is not long. 
Against the problem of traditional check valve,Our company has developed H76 lug wafer type check valve standard wafer type dual-plate swing check valve,H74 wafer type sing-plate swing check valve,H71 wafer type lift check valve,and series of those products according to many years of researching,designing and manufacturing.All of products we are as required of the standard of America API and Germany DIN. Being used on the industry of oil.petro,metallurgy,electric,light industry,food,we have received high praise from customers.

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Description

Check valves is usually installed in pipeline system,prevent medium from flowing back.check valve is automatic valve that it is opened and closed by pressure of fluid.In the past, we use H44 flange coupling swing type check valves&H44 flange coupling lift type check valve.Traditional check valve's volume is big,strong resistance of fluid,Water-hammer's pressure is high when valves close,repair and installation is inconvenient,service life is not long. 
Against the problem of traditional check valve,Our company has developed H76 lug wafer type check valve standard wafer type dual-plate swing check valve,H74 wafer type sing-plate swing check valve,H71 wafer type lift check valve,and series of those products according to many years of researching,designing and manufacturing.All of products we are as required of the standard of America API and Germany DIN. Being used on the industry of oil.petro,metallurgy,electric,light industry,food,we have received high praise from customers.


Single plate wafer lift check valve Features
Design and manufacture:API594,API 6D,JB/T 8937
Face to face dimensions:ANSI B16.10,API 6D,GB/T 12221,DIN 3202,EN558-1
End Connection:ANSI B16.5,ASME B16.47 A/B,ISO 10423,EN1092-1,BS 4505,JIS2210,GB 9112~9124,HG20592~20635 etc
Wall Thickness:API 594,JB/T8937
Testing standard:API598,GB/T13927,DIN3230
Size:1 1/2"-42",DN40-DN1000
Pressure rating:Class150~Class600,PN10-100
Body:A105,LF2,LF3,F22,F304,F316,F304L,F316L,F51,F53,F55,F44 etc
Disc: SS201,SS304,SS316,Aluminium Bronze
Seat:NBR, EPDM, oil & acid & alkali resitant VITON-A, steam resitant VITON-B, hypalon, PTFE, metal to metal
Spring material:316,Inconel 750,Innconel718 etc
Applicable Medium: water ,gas,oil,and other causticity medium.

Test Item

Shell Test

Seal Test

Back Seal Test

Air Seal Test

Medium

Water

Air

Unit

MPa

lbf/in2

MPa

lbf/in2

MPa

lbf/in2

MPa

lbf/in2

Pressure (Class)

150

3.1

450

2.2

315

2.2

315

0.5-0.7

60-100

300

7.8

1125

5.6

815

5.6

815

400

10.3

1500

7.6

1100

7.6

1100

600

15.3

2225

11.2

1630

11.2

1630

900

23.1

3350

16.8

2440

16.8

2440

1500

38.4

5575

28.1

4080

28.1

4080

 Single plate wafer type swing check valve Standard materials of parts


No.

Part

Material

1

Lifting ring bolt

SS

2

Screw

SS

3

Axle bushing

SS

4

Spring

SS or Inconel-X

5

Body

WCB, CF8,CF 8M , CF3, CF 3M

6

Disc

WCB, CF8, CF 8M , CF3, CF 3M

7

Disc hinge pin axle

SS304,SS316, SS 304L , SS 316L

8

Pin axle bearing

SS304,SS316, SS 304L , SS 316L

9

Plate

SS304, SS316, SS 304L , SS 316L

10

Sealing face

Metal, NBR, BUNA, EPDM

Other cast steel material is also available upon request.



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