Non-Water Hammer Check Valve


Non-Water Hammer Check Valve
SL series
(PAT.)

No valve closure delay means no water hammer and no noise

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Technical data

Examples of non-water hammer pumping systems

Solution to water hammer caused by simple reverse flow
(Eliminated with only the Non-Water Hammer Check Valve)

Non-Water Hammer Check Valve / Examples of non-water hammer pumping systems

With coil spring

Non-Water Hammer Check Valve / Examples of non-water hammer pumping systems

Non-Water Hammer Check Valve / Examples of non-water hammer pumping systems

Non-Water Hammer Check Valve


Solution to water hammer caused by recombined flow after water column separation
(Surge tank is not required because of patented non-water hammer principle)

Non-Water Hammer Check Valve / Examples of non-water hammer pumping systems



Please note the following points when installing the Non-Water Hammer Check Valve.

1

Do not install with the discharge side facing downward.

Non-Water Hammer Check Valve

2

Do not install with the discharge side facing downward.

Non-Water Hammer Check Valve

3

SL-SN, SH types must not be installed in a leaning position.

Non-Water Hammer Check Valve

4

The check valve must not be exposed to any deflected flow directly after the pump or other valve.

Non-Water Hammer Check Valve

5

If air is trapped in the pipe before the check valve, chattering may occur when starting pump operation. Make sure to install an exhaust valve in such cases.

Non-Water Hammer Check Valve

6

If the check valve on a submerged or vertical pump is installed at ground level, the inlet side of the check valve may become a vacuum when the pump is stopped and may cause water hammer. Carefully plan the location of the check valve in such cases.

Non-Water Hammer Check Valve

7

In addition to water hammer directly after the discharge of the pump, examine surging due to negative pressure in the middle of piping. (Please contact us for details.)

Non-Water Hammer Check Valve



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