wafter type NRV
Salient Features and Specialities:
- Spring closing arrangements for the prevention of reverse flow the pipelines.
- These valves are general purpose valves that are stronger, lighter and smaller than conventional
swing check valves and therefore, less expensive to install and maintain.
- Suitable for higher pressure /temperature (up to 400oC).
- Compact design for simple installation between wide ranges of flange types.
- It can be mounted in any plane/direction.
- Extremely low opening pressures.
- Spring assisted silent closing.
- Available sizes 15mm to 100mm,suitable for PN6-PN40 and 150/300.
- Weight and Dimension are same for class 150 & class 300 valves.
- Valves are self-centering type.
- Zero leakage for soft seated valves.
- The maximum permissible leakage rate shall be 3 cubic centimeters per inch of nominal pipe size
for metal-seated valves.
Sr.No. |
NAME OF PARTS |
MATERIAL |
1 |
BODY |
A.I.S.I 316 / W.C.B. |
2 |
YOKE |
A.I.S.I 316 |
3 |
SPRING |
A.I.S.I 316 |
4 |
DISC. |
A.I.S.I 316 |
5 |
CIRCLIP |
A.I.S.I 316 |
SIZE (in MM) |
A |
B |
C |
D |
D1 |
D2 |
15 |
20 |
15 |
4 |
36 |
50 |
43 |
20 |
20 |
20 |
4 |
43 |
60 |
53 |
25 |
25 |
25 |
5 |
52 |
70 |
63 |
32 |
28 |
32 |
5 |
71 |
81 |
72 |
40 |
32 |
40 |
6 |
78 |
91 |
84 |
50 |
55 |
50 |
7 |
89.5 |
115 |
96 |
65 |
46 |
65 |
8 |
110 |
126 |
116 |
80 |
50 |
76 |
0 |
130 |
130 |
|
100 |
60 |
100 |
0 |
159 |
159 |
|
150 |
106 |
152 |
0 |
219 |
219 |
|
200 |
145 |
203 |
0 |
270 |
270 |
|