Silent check valve
Product overview:
The silent check valve is mainly composed of main components such as valve body,valve seat, guide body, valve disc, bearing, and spring. The internal water flow path adopts a streamlined design, with minimal head loss. At the same time, when the pump is stopped, the valve disc closing stroke is very short,which can be quickly closed to prevent huge water hammer and water hammer sound, forming a silent effect. This valve is mainly suitable for fire protection, HVAC, chemical, power plant, metallurgy, petrochemical, water supply and other systems.
Material:
|
No |
1 |
2 |
3 |
4 |
5 |
6 |
|
Part name |
Valve body |
Valve flap |
Spring |
Bearing |
Baffle |
Valve seat |
|
Material |
Grey cast iron; Ductile iron (PN25) |
Aluminum bronze (hard sealed) Aluminum bronze+rubber (soft seal) |
Stainless steel |
Aluminum bronze |
Grey cast iron |
Aluminum bronze |
Technical Parameters：
|
Nominal pressure (MPa) |
Test pressure (MPa) |
Applicable Medium |
Temperature |
|
|
Housing |
Seal |
|||
|
1.0 |
1.5 |
1.10 |
Temperature |
≤80℃ |
|
1.6 |
2.1 |
1.76 |
||
|
2.5 |
4.0 |
2.75 |
||
|
No |
Name |
Material |
|
1 |
Valve body |
Nodular cast iron |
|
2 |
Sealing ring |
Nitrile rubber |
|
3 |
Valve stem |
Stainless steel |
|
4 |
Spring |
Stainless steel wire |
|
5 |
Valve flap |
Nodular cast iron |
Dimensions:
|
Nominal Diameter |
D |
D1 |
D2 |
b |
h |
n-d |
|
|
1.0MPa or 1.6MPa |
1.0MPa |
1.6MPa |
|||||
|
50 |
160 |
125 |
99 |
17 |
125 |
4-Ф19 |
4-Ф19 |
|
65 |
180 |
145 |
118 |
17 |
145 |
4-Ф19 |
4-Ф19 |
|
80 |
194 |
160 |
132 |
18 |
180 |
8-Ф19 |
8-Ф19 |
|
100 |
214 |
180 |
156 |
18 |
190 |
8-Ф19 |
8-Ф19 |
|
125 |
245 |
210 |
184 |
19 |
254 |
8-Ф19 |
8-Ф19 |
|
150 |
280 |
240 |
211 |
19 |
267 |
8-Ф23 |
8-Ф23 |
|
200 |
333 |
295 |
266 |
20 |
292 |
8-Ф23 |
12-Ф23 |
|
250 |
403 |
350 |
319 |
22 |
330 |
12-Ф23 |
12-Ф28 |
|
300 |
460 |
400 |
370 |
23 |
356 |
12-Ф23 |
12-Ф28 |
