Wafer type butterfly check valve
Technical Parameters
Product model: H76H/W
Nominal diameter: DN50~1200mm
Nominal pressure: PN1.0~4.0MPa
Operating temperature: -29°C~200°C
Applicable medium: water, steam, oil, nitric acid, acetic acid
Product Description
Stainless steel butterfly check valve is composed of valve body, valve disc, valve stem and spring and other parts, and is connected by wafer. Due to the short closing stroke and spring loading of this disc, water hammer is significantly reduced. Mainly used in urban, industrial and high-rise building water supply, drainage network. Its structural length is shorter than that of general check valves, and it is suitable for occasions with limited installation space. The opening and closing parts are opened or closed by the medium flow and force to prevent the backflow of the medium.
Main performance specifications
| DN | DN(mm) | DN50~DN1200 | |||
| PN | PN(MPa) | 1.0MPa | 1.6MPa | 2.5MPa | 4.0MPa |
| Test pressure | Strength test | 1.5MPa | 2.4MPa | 3.75MPa | 6.0MPa |
| Seal test | 1.1MPa | 1.76MPa | 2.75MPa | 4.4MPa | |
| Applicable media | Water, steam, oil, sewage, acid and alkali | ||||
| Proper temperature |
Rubber sealing surface (X) -20℃~120℃ Alloy steel sealing surface (H) body carbon steel -29℃~425℃ Stainless steel body for acid medium -29℃~200℃ |
||||
Material of main parts
| Body | Cast iron, cast steel, stainless steel, chromium nickel molybdenum titanium steel |
| Plate | Cast iron, cast steel, stainless steel, chromium nickel molybdenum titanium steel |
| Stem | Carbon steel, 2Cr13, stainless steel, chromium nickel molybdenum titanium steel |
| Sealing ring | Rubber, stainless steel, alloy steel |
| Spring | 60Si2Mn、3Cr13、17-7PH、INCONEL |
Main external connection dimensions
Nominal pressurePN
(MPa)
Nominal Diameter
DN(mm)
Size(mm)
WT
(kg)
Piping flange (for reference)
L
D
D3
D2
D1
n
Number of bolts d
Bolt length D
1.0
40
43
92
55
41
1.8
110
4
M16
105
50
43
107
65.5
51
2
125
4
M16
150
65
46
127
81
65
3
145
4
M16
155
80
64
143
95
80
4
160
8
M16
160
100
64
162
117.5
102
6
180
8
M16
165
125
70
192
145.5
127
8
210
8
M16
180
150
76
218
170.5
152
13
240
8
M20
205
200
89
273
227.5
203
24
295
8
M20
235
250
114
328
266
254
35
350
12
M20
255
300
114
380
312
305
48
400
12
M20
290
350
127
438
361
350
78
460
16
M20
295
400
140
489
406
400
106
515
16
M24
310
450
152
539
450
450
135
565
20
M24
325
500
152
594
505
500
165
620
20
M24
345
600
178
695
624
600
260
725
20
M27
355
1.6
40
43
92
55
41
1.8
110
4
M16
105
50
43
107
65.5
51
2
125
4
M16
150
65
46
127
81
65
3
145
4
M16
155
80
64
142
95
80
4
160
8
M16
160
100
64
162
117.5
102
6
180
8
M16
165
125
70
192
145.5
127
8
210
8
M16
180
150
76
218
170.5
152
13
240
8
M20
205
200
89
273
227.5
203
24
295
12
M20
235
250
114
330
266
254
37
355
12
M24
265
300
114
385
312
305
50
410
12
M24
305
350
127
445
361
350
80
470
16
M24
310
400
140
495
406
400
110
525
16
M27
330
450
152
555
450
450
145
585
20
M27
345
600
152
615
505
500
180
650
20
M30
370
600
178
730
624
600
280
770
20
M33
380
