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H42H-16/25C cast steel vertical check valve
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Product details
Introduction to H42H-16/25C Cast Steel Vertical Check Valve
A valve that opens or closes by the flow and force of the medium to prevent reverse flow of the medium is called a check valve. Check valves belong to the category of automatic valves and are mainly used in pipelines where the medium flows in one direction. They only allow the medium to flow in one direction to prevent accidents.
check valveAccording to the structure, it can be divided into three types: lift check valve, swing check valve, and butterfly check valve. Lift check valves can be divided into two types: vertical and horizontal. Swing check valves are divided into three types: single disc, double disc, and multi disc. Butterfly check valve is a straight through type, and the above types of check valves can be divided into threaded connection and French connection in terms of connection formThere are three types: blue connection and welding.
H42H-16/25CVertical cast steelcheck valveWorking principle
H42HThe series of vertical check valves can prevent medium backflow and play a role in medium check.H42HThe vertical check valve is in the open state when the medium pressure at the inlet end is higher than that at the outlet end. Due to the pressure of the medium at the inlet end of the pipeline, the valve disc in the top opening check valve automatically opens. When the pressure of the medium at the inlet end is lower than that at the outlet end, the spring pushes the valve disc towards the valve seat and closes the valve (note: springs are required for horizontal installation, but not for vertical pipeline installation. The valve disc will automatically close under its own weight and the pressure of the reverse flow medium)
H42H-16/25CCast steel vertical check valvetechnical specifications
1 Applicable media: water, oil, steam.
2 Suitable temperature:≤425℃.
3 Valve test pressure and maximum working pressure of the valve at various temperatures.
|
model |
nominal |
test pressure |
operation temperature(℃) |
|||
|
pressure |
strength |
seal |
low pressure seal |
|||
|
|
(water)Mpa |
(water)air(Mpa) |
(air)Mpa |
|||
|
H42H-16C |
1.6 |
2.4 |
1.8 |
0.6 |
≤425 |
|
|
H42H-25C |
2.5 |
3.8 |
2.8 |
0.6 |
≤425 |
|
|
H42H-40C |
4 |
6 |
4.4 |
0.6 |
≤425 |
|
|
model+(Material) |
nominal pressurePN（MPa） |
test pressureP3(MPa) |
Applicable temperature (℃) |
Applicable Medium |
||
|
housing |
seal |
|||||
|
H42H-16C(Carbon steel) |
1.6 |
2.4 |
1.76 |
≤425 |
Water and oil products |
|
|
H42H-16P（304） |
≤200 |
Weakly corrosive medium |
||||
|
H42H-25P（304） |
2.5 |
3.75 |
2.75 |
|||
|
H42H-25R（316） |
corrosive media |
|||||
|
H42H-40P（304） |
4 |
6 |
4.4 |
Weakly corrosive medium |
||
|
H42H-40R（316） |
corrosive media |
|||||
|
H42Y-40I(Chromium molybdenum steel) |
≤550 |
Water and oil products |
||||
H42H-16/25C cast steel verticalcheck valveStructural diagram
H42H-16/25CCast steel vertical check valveExternal dimensions
|
Weighing pressure |
Nominal Diameter |
Main connection dimensions |
shape |
||||||||
|
L |
D |
D 1 |
D 2 |
D 6 |
b |
f |
f 1 |
Z-φd |
H |
||
|
1.6MPa |
40 |
200 |
145 |
110 |
85 |
- |
16 |
2 |
- |
4-18 |
95 |
|
50 |
230 |
160 |
125 |
100 |
- |
16 |
2 |
- |
4-18 |
105 |
|
|
65 |
290 |
180 |
140 |
120 |
- |
18 |
2 |
- |
4-18 |
120 |
|
|
80 |
310 |
195 |
165 |
135 |
- |
20 |
3 |
- |
8-18 |
130 |
|
|
100 |
350 |
215 |
180 |
155 |
- |
20 |
3 |
- |
8-18 |
140 |
|
|
125 |
400 |
245 |
210 |
185 |
- |
22 |
3 |
- |
8-12 |
155 |
|
|
150 |
480 |
280 |
240 |
210 |
- |
24 |
3 |
- |
8-23 |
180 |
|
|
200 |
600 |
335 |
295 |
265 |
- |
26 |
3 |
- |
12-23 |
215 |
|
H42H-16/25CCast steel vertical check valveinstructions:
This valve is an essential device on industrial pipelines. During installation, carefully check whether the valve markings and nameplates meet the functional requirements.
Before installation, the valve must be cleaned thoroughly and any defects caused during transportation must be removed.
The installed valve should be kept clean regularly, and the threaded part of the valve stem should be regularly oiled.
This valve should be stored in a dry and ventilated room for long-term storage, and should be regularly inspected to prevent rusting.
Attention: During use, the screw cover may experience moisture leakage, and the cover screws should be tightened.
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