Check / Non Return / Reflux Valves |
| The
choice of a check valve for pumping is always ticklish for a
system designer. Quantum of head loss vs. non slam characterstics,
quick closing vs. dampened slow closure , vertical vs. horizontal
application, spring assisted vs. self closing door, maintenance free
long life at a relatively higher price vs. low price maintenance prone,
are but a few parameters considered vis-à-vis application. We
can help select the right valve that will be good value for money. |
Characterstics of Check valve
- Robust and reliable
- Long Life
- Low maintenance
- Choice of material and trim
- Solution for every pumping application
|
|
| SINGLE DOOR CHECK VALVE ( 80-600 NB) |
|
|
The
large girth around the flow passage, slanted seat, disposition of extra
mass on door to impart quick closing characteristics, ensure relatively
quieter door closure on pump trip. Can be tailor-made for arduous
duty or vertical application
| Size |
80 |
100 |
125 |
150 |
200 |
250 |
| LOF |
203 |
241 |
292 |
330 |
495 |
622 |
| Size |
300 |
350 |
400 |
450 |
500 |
600 |
| LOF |
698 |
787 |
914 |
978 |
978 |
1295 |
|
|
| Sr no. |
Component |
Material |
| 1 |
Body |
C.I / D.I |
| 2 |
Cover |
C.I / D.I |
| 3 |
Door |
C.I / D.I |
| 4 |
Door Face Ring |
Bronze / St St. |
| 5 |
Body Seat Ring |
Bronze / St St. |
|
Seat - Metal to metal
Standard - IS 5312, Part I:BSEN 12334
Rating - PN 10, PN 16
Optional - Bypass arragement, other trim material. |
| DUAL PLATE CHECK VALVE ( 80 - 1200 NB) |
|
 |
Choice
of springs (rigid and mild) dictate the speed of door closure and the
minimum flow velocity at which doors open. Compact, low priced,
calls for replacement of spring set from time to time. Both
flanged and wafer designs as per API 594, PN 10/ PN 16 are available.
| Size |
80 |
100 |
125 |
150 |
200 |
250 |
| LOF |
57 |
64 |
70 |
76 |
95 |
108 |
| Size |
300 |
350 |
400 |
450 |
500 |
600 |
| LOF |
143 |
184 |
191 |
203 |
213 |
222 |
| Size |
700 |
750 |
800 |
900 |
1000 |
1200 |
| LOF |
305 |
305 |
356 |
368 |
432 |
524 |
|
| Sr no. |
Component |
Material |
| 1 |
Body |
C.I / D.I / Cast Steel |
| 2 |
Door |
D.I / Cast Steel /St. St. |
| 3 |
Door Face |
Elastomer / Bronze /St. St/ |
| 4 |
Retainer Bar |
Stainless Steel |
| 5 |
Spring |
Stainless Steel |
Seat - Rubber to metal ;metal to metal
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