4
2.3 Valve function
DANGER
When the valve closes the actuator moves. Do not put
tools or parts of your body between the moving valve
parts. Note the injury risks (see drawings 3A and 3B).
Note the dangerous places (see drawings 3A and
3B)!
When the pinch valve closes, two pinch bars,
moved by the actuator, squeeze the sleeve,
closing on the center line. As the valve is fully
closed, the actuator has raised one half of the
valve diameter.
The actuator raises in both models (PV and PVE)
0.5 x valve nominal diameter (measure X).
In the open model the space between the pinch
bars, the space between the upper pinch bar and
fixing plate of the actuator and the space below
the lower pinch bar.
Fig. 3A -
PV open model
In the enclosed model the space between the
valve body and the fixing plate of the actuator
and the ends of the guide bars of lower pinch bar
below the valve body.
Fig. 3B -
PVE enclosed model
Regarding the actuators, follow the instructions of the manufacturer.
NOTE
Note the possible remote control of automatic valves and
turn it off before starting maintenance.
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