Valve Operation - Pentair V250 Bedienungs- Und Wartungsanlitung

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VALVE OPERATION

The V250 valve is operated by properly pressurizing the valves chamber from on side
or the other of the pistons. This is done by the pressure distributor pilots that are
actuated by a rotating camshaft (fig 1). Different camshaft models exist depending on
chosen controller, on the application and on the system type (simplex, duplex etc).
E
N
The following fluids can be used for activation of the valve:
G
•
L Compressed air, filtered but not dry, with a pressure between 2 and 6 bars;
I
•
Water, filtered, with a pressure between 1.5 and 6 bars.
S
H
When using water as a fluid, it is recommended to draw from a different distribution
line than the one for the water being treated, in order to ensure a constant feeding
pressure.
Attention: whatever fluid is used to drive the valve, it pressure should be equal to the
pressure of the water inside the system. If the driving pressure is too low, the pistons
will not move; if the driving pressure is too high the valve can be damaged.
Inlet valve body²
Tank
MANUAL_V250.indd 18
Feed from the injector
Brine line
Exhaust
Camshaft
Fig. 1 - Pilot - valve operation diagram
16
Inlet valve body
Feed from injector
Brine Line
Tank
Exhaust
Camshaft
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