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Check valve

A check valve , clack valve , non-return valve or one-way valve is a mechanical device , a valve , which normally allows fluid ( liquid or gas ) to flow through it in only one direction. Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, many check valves are very small, simple, and/or cheap. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.

 

Features
Type

Swing check Valve, Floating ball type check valve,API check valve, Forged steel check valve,wafer Type Check Valve,lift Type Check Valve.

Design BS 1868 / API 6D
Face to face ASME B 16.10
Flanges ASME B 16.5
Butt welding ASME 16.25
Testing API 598 / BS 6755 Part I / API 6D
Material ASTM Specifications
Trims Varieties of combinations.
Optional By pass arrangement
Dash pot / hydraulic non-slam arrangement.
Note RTJ Joints on request.
RTJ Body Bonnet Joints for ratings > 1500 lbs (standards)
Material
Body wcb,cf8,cf8m, etc
Gate ca-15,cf8,cf8m, etc
Seat ptfe glass or carbon filled ptfe
Dimensions
150 #
300 #
Size m.m
F/f
H
Wt *
F/f
H
Wt *
15
108
95
6
152.4
95
7
20
117.5
100
8
178
100
10
25
127
105
10
203
105
15
40
165
110
15
228.6
110
20
50
203
132
16
267
152
25
65
216
152
24
292
175
40
80
241
173
27
318
200
55
100
292
208
45
356
238
75
150
356
254
73
444
287
150
200
495
308
132
533
352
225
250
622
330
238
622
398
335
300
698
362
295
711
450
485
350
787
425
525
838
463
670
400
864
500
610
864
515
830
450
978
565
820
978
600
990
500
978
625
930
1016
640
1375
600
1295
725
1275
1346
755
2230
Dimensions
600 #
900 #
1500 #
2500 #
Size m.m.
F/f
H
Wt *
F/f
H
Wt *
F/f
H
Wt *
F/f
H
Wt *
50
292
197
33
368
215
55
368
235
86
451
305
75
65
330
205
49
419
265
95
419
300
99
508
350
120
80
356
225
65
381
240
90
470
270
133
578
390
145
100
432
262
112
457
265
143
546
325
180
673
415
275
150
559
335
220
610
360
305
705
415
380
914
565
470
200
660
440
385
737
425
540
832
465
695
1022
640
665
250
787
472
465
838
496
930
991
560
1050
-
-
-
300
838
482
730
965
566
1060
1130
665
1300
-
-
-