SL-SN-D

SL-SNP-D
Swing type (Bore 150-450mm)

Quiet with no water hammer

There is no delay in the start of valve closure because the valve disk opens and closes in response to the amount of flow. By making full use of the Non-Water Hammer Check Valve features, which prevents water hammer, and by adding the function of the dashpot, shock is completely absorbed even in short pipes with low head.

New dashpot

Based on non-water hammer principle, a unique patented mechanism has been adopted in which the valve disk is connected to the dashpot and buffered closing occurs at a point immediately before valve closure when the flow within the pipe nears a standstill. As a result, the dashpot has been made compact, inexpensive, and operation is reliable.

Built-in counterweight

Since the valve arm and the valve disk form the counterweight and the valve seat is designed at an angle to the passage of flow, operation within the range in which the valve disk closes rapidly is smooth and quick.

Buffered closing begins softly

At the point when operation changes from rapid closing to buffered closing, a load begins to bear gradually on the connection pin when the speed of flow nears zero, activating braking by the dashpot. Thus there is no shock to each link and the valve begins to be buffered smoothly.

Easy handling

Dashpot buffered closing timing adjustment and maintenance inspections are extremely simple, and maintenance costs can be reduced considerably because of the simple, single-disk construction.

Example of sewage (treatment) plant drainage facility

If it is necessary to prevent water hammer due to recombined flow after water column separation in the middle of piping, please contact us.