CSV3R General Information
The CYCLE STOP VALVE model CSV3R is a pump control valve
that automatically adjusts pump output to match variable flow requirements.
Downstream of the CSV3R, pressure remains constant as long as
demand on the system is between 5 gpm and the maximum pump output.
As flow rates vary, the change in pressure causes the liner inside the
CSV3R to modulate closer to or farther away from the grillwork area and
seating surface. This enables the pressure downstream of the CSV3R to
remain constant regardless of flow.
When there is no longer any demand on the system, the pressure on the
discharge side of the valve begins to rise and the liner presses against the
seating surface. The valve and seat surface are designed to never be able
to completely seal. The non-closing seat is designed to allow flow of approximately
5 gpm. As the pressure tank slowly fills, the pressure begins
to rise to the pressure switch shut off pressure. Shut off pressure must
always be higher than the pressure held constant by the Cycle Stop Valve.
Regardless of tank size, the pressure downstream of the CSV3R will slowly
rise to the pressure switch shut off point and the pump will shut off. As
flow is again demanded from the system, the pressure tank will empty and
the system pressure will drop to the pressure switch start point and the
pump will start.
This model will not tolerate trash being pumped through it and needs to be
used in clean water only applications. When start pressure and valve pressure
are set the same, this valve eliminates water hammer from your system.
The CYCLE STOP VALVE model CSV3R is available in 2" to 12" with flow
rates available from 5 gpm to 5000 gpm. Sizes 2" through 4" are available
in a wafer type flanged mode and sizes 6" through 12" are only available in
a flanged model. They are adjustable from 15-150 PSI ( 100-300 PSI
Please note that there can be no more than 125 psi differential (difference
in pressure between inlet pressure and outlet pressure). The standard
CSV3R is made of stainless steel.
Note: In multiple pump applications,
never share a CSV with multiple pumps. Each pump must have its