CSV3B General Information
The Cycle Stop Valve model CSV3B is a pump control valve that automatically
adjust pump output to match your variable demands.
As your demands vary, the CSV reacts to changes in pressure and
opens and closes accordingly. This enables it to hold a constant pressure
as long as your demand is more than the minimum control flow of
If you demand more than your pump can provide at the pressure the
valve is trying to hold, the valve will stop actuating at all and open
fully. Your system pressure will become whatever pressure the pump
can build at that point.
When there is no longer any demand on the system, water will begin
to go into the pressure tank and the system pressure will begin to
rise. The pressure tank will then refill slowly at the valve minimum
control rate of 5 gpm (not your full pump rate) until it reaches shut
off pressure. Keep this in mind when choosing your pressure tank as
this function allows for a much smaller pressure tank to protect your
pumping system than you would be able to use on a standard system
without the CSV valve controlling the pump. Motor manufacturers
recommend a minimum 1 minute of run time any time your pump is
called to come on. The time it takes to refill your pressure tank will
guarantee that run time regardless of how you use water.
When water is again demanded, the pressure tank will empty causing
the system pressure to reach cut in pressure and the pressure switch
will start the pump. NOTE: Pressure switch shut off pressure must
always be set higher than the pressure regulated by the CSV.
The CYCLE STOP VALVE model CSV3B is certified by WQA to NSF
ANSI/372 no lead standards. It is a single chamber diaphragm operated
valve available in 2" and 3" threaded or flanged, and 4" through
12" flanged with flow rates available from 5 gpm to 5000 gpm. Model
CSV3B valves are adjustable between 15-150 PSI. Difference in
pressure between inlet pressure and outlet pressure cannot be more
than 125 PSI.
NOTE: In multiple pump applications, each pump must have its own valve.