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Check valve

Pressure Seal Check Valve

Pressure Seal Check Valves are ideal for high pressure steam, liquid, catalytic reformers, hydro crackers and other tough services. In the tough world of High pressure, High temperature valve applications, Pressure Seal Check Valve continue to provide a wide range of industries with a safe, leak free, pressure containing boundary. These valves are unidirectional and restrict flow from opposite direction. These are best suited for moderate velocity conditions. Check valves are normally designed for horizontal flow condition, but can also be installed in vertical pipeline, but in vertical pipeline, the flow shall be in upwards direction and under the disc. 
The basic concept of pressure seal valves is that the initial cover pull up bolts tighten the cover which inturns seals the pressure seal gasket to the body. Then the system pressure assist for more force to seal the gasket. Hence, as system pressure increases, the potential for leakage through the body/bonnet joint decreases.

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Description

Pressure Seal Check Valves are ideal for high pressure steam, liquid, catalytic reformers, hydro crackers and other tough services. In the tough world of High pressure, High temperature valve applications, Pressure Seal Check Valve continue to provide a wide range of industries with a safe, leak free, pressure containing boundary. These valves are unidirectional and restrict flow from opposite direction. These are best suited for moderate velocity conditions. Check valves are normally designed for horizontal flow condition, but can also be installed in vertical pipeline, but in vertical pipeline, the flow shall be in upwards direction and under the disc. 
The basic concept of pressure seal valves is that the initial cover pull up bolts tighten the cover which inturns seals the pressure seal gasket to the body. Then the system pressure assist for more force to seal the gasket. Hence, as system pressure increases, the potential for leakage through the body/bonnet joint decreases.

Feature

Only one sealing face is designed on the valve body and valve disc,

Full stellite overlay seat sealing surface

Good for manufacturing process and easy to maintain.

Use flexible and woven graphite collaboration type packing.

Absolute bonnet joint leak proof.

Optional by-pass design.

Optional designed with a Damping Cylinder.

Pressure Seal Check Valve


Specifications

Size:2"-16"

Pressure:Class900-2500

Design and Manufacture: API600 ,ASME B 16.34, API6D, BS5351
Inspection and Test: API598
End flange dimension: ASME B16.5 (for NPS≤24); AMSE B16.47 series B
Socket-weld dimension: ASME B16.11
Face to face and end to end: ASME B 16.10
Pressure/temperature rating: ASME B16.34
Materials: WCB, LCB, LCC, CF8, CF8M, CF3, CF3M, A105, LF2, F11, F22, F5, F304, F316, F304L, F316L

ANSI Pressure seal check valve materials list


No.

Parts

Material

1

Body

ASTM A216 Gr.WCB

2

Seat ring

ASTM A105+13Cr

3

Disc

ASTMA216 Gr.WCB+13Cr

4

Hinge

ASTM A216 Gr.WCB

5

Disc cover

ASTM A276 410

6

Screw

ASTM A276 410

7

Locking  pin

ASTM A276 410

8

Locking ring

ASTM A105

9

Seal ring

ASTM A182 F304

10

Gasket

ASTM A182F6a

11

Segment ring

ASTM A182F6a

12

Cover

ASTM A216 Gr.WCB

13

Stud

ASTM A193 Gr.B7

14

Nut

ASTM A194 Gr.2H

15

Eye bolt

C.S.

16

Bonnet

ASTM A216 Gr.WCB

17

Bolt

S.S

18

Pin

ASTM A276 410

19

Hinge block

ASTM A216 Gr.WCB


ANSI swing check valve dimension and weight(900~2500lb)


Class 900

size

in.

mm

 2 

50

2 1/2   65

  3

 80

  4 

100

  6

150

  8

 200

10 250  12 300 14 350

16 

400

L
(BW)

in.
mm

8.5
216

10
254

12
305

14
356

20
508

26
660

31
787

36
914

39
991

43
1092

L1
(RF)

in.
mm

14.5
369

16.5
419

15
381

18
457

24
610

29
737

33
838

38
965

40.5
1029

44.5
1130

L2
(RTJ)

in.
mm

14.62
371

16.62
422

15.12
384

18.12
460

24.12
613

29.12
740

33.12
841

38.12
968

40.88
1038

44.88
1140

H

in.
mm

7.4
188

8.27
210

8.27
210

8.5
216

14.5
368

20.12
511

24.17
614

27.76
705

28.98
736

29.76
756

WT
(Kg)

in.
mm

48
33

63
44

60
42

122
76

254
177

511
383

938
703

1448
1128

1723
1353

1832
1463

L
(BW)

in.
mm

8.5
216

10
254

12
305

16
406

20
559

28
711

34
864

39
991

42
1067

47
1194

Class 1500

L1
(RF)

in.
mm

14.5
369

16.5
419

15
381

18
457

24
610

29
737

33
838

38
965

40.5
1029

44.5
1130

L2
(RTJ)

in.
mm

14.62
368

16.62
419

18362
470

21.62
546

27.75
705

32.75
832

39
991

44.5
1130

49.5
1257

54.5
1384

H

in.
mm

10.43
265

10.43
265

10.63
270

14.57
370

18.7
475

22.44
570

24.8
630

30.31
770

31.3
795

32.44
824

WT
(Kg)

in.
mm

58
40

73
51

71
69

128
84

332
228

588
458

1023
713

1528
1148

1852
1388

2058
1542

L
(BW)

in.
mm

11
279

13
330

14.5
368

18
457

24
610

30
762

36
914

41
1041

-

-

Class 2500

L1
(RF)

in.
mm

17.75
451

20
508

22.75
578

26.5
673

36
914

40.25
1022

50
1270

56
1422

-

-

L2
(RTJ)

in.
mm

17.87
454

20.25
514

23
584

26.88
683

36.5
927

40.87
1038

50.88
1292

56.88
1445

-

-

H

in.
mm

11.02
280

12
305

12.2
310

14.57
370

19.1
485

21.42
544

27.95
710

31.5
800

-

-

WT
(Kg)

in.
mm

86
52

113
88

133
93

213
158

548
383

988
638

1598
1198

2298
1723

-

-


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