Swing Check Valve

Swing Check Valve Manufacturing Specifications
Content
Specification
General design standard
ASME B16.34/API600
Pressure-temperature rating
ASME B16.34
Face to face dimensions
ASME B16.10
Flange type and dimensions
ASME B16.5
Butt-welded end
ASME B16.25
Inspection and test
API 598
Construction Features Function
1.Construction
ZGFQ swing check valve adopt B.B., single disc swing, which is in accordance with international general standard.
2.Seat
For ZGFQ swing check valve in different pressure or specifications, the seat would have the following types:
(1) The connection of the seat ring and the body may either be threaded or welded type. The threaded type seat is easy for disassemble, maintenance and replacement.
(2) The sealing surface is directly welded on the body.
(3) For stainless steel gate valve, the sealing surface is machined and finished on the body.
3. Gasket
The connection between body and bonnet shall be bolted flange. Gasket of flange shall be as follows:
Below Class 600 Female and male gasket
CLASS 600 & Larger Octagon ring gasket

The metal spiral wound gasket with inner ring and filling with graphite makes more reliable for the seal of the gasket and excellent capability of disassembling and reassembling.

 

API Series Swing Check Valve

API Series Swing Check Valve

Only for 6°Ś& above 6°ŚClass150; 4°Ś&above 4°Ś, Class300,Class600 swing check valve, eye screw would be installed on it.
RTJ°°BW
CLASS 150 Dimensions £®Flange dimensions refer to ASME B16.5 CLASS150£©
DN
2"
21/2"
3"
4"
6"
8"
10"
12"
14"
16"
18"
20"
d
51
64
76
102
152
203
254
305
337
387
438
487
LRF&BW
203
216
241
292
356
495
622
699
787
864
978
978
H
150
168
182
215
277
350
400
417
515
540
580
610
Wt(kg)
15
24
40
52
84
100
163
240
436
540
680
830
CLASS 300 Dimensions £®Flange dimensions refer to ASME B16.5 CLASS300£©
DN
2"
21/2"
3"
4"
6"
8"
10"
12"
14"
16"
18"
20"
d
51
64
76
102
152
203
254
305
337
387
432
483
LRF&BW
267
292
319
356
444
533
622
711
838
864
978
1016
H
178
185
215
246
352
420
400
440
560
580
620
650
Wt(kg)
20
32
50
75
136
184
295
410
565
640
980
1320
CLASS 600 Dimensions £®Flange dimensions refer to ASME B16.5 CLASS600£©
DN
2"
21/2"
3"
4"
6"
8"
10"
12"
14"
16"
d
51
64
76
102
152
200
248
298
327
375
L
RF&BW
292
330
356
432
559
660
287
838
889
991
RTJ
295
333
359
435
562
664
791
841
892
994
H
180
205
252
284
380
430
515
550
595
635
Wt(kg)
32
42
58
110
215
392
526
870
940
1350