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Idiomas disponibles
Idiomas disponibles
Open body valve PV
In the open body model the body and the actuator are
connected only to one of the end flanges (Figure 5). The
construction allows a slight deviation in the pipe angle and
the valve can act as a vibration absorber.
Note that in case of a sleeve breakage, the flowing
liquid will leak into the environment.
Enclosed body valve PVE
The body of the enclosed model prevents excessive leakage
of flowing media to the environment (Figure 6). The lower
part of the body has a plug, which can be opened to check for
sleeve failure.
Figure 4.
Enclosed/Sealed body valve PVE/S
The PVE/S includes extra stem and body seals to provide
a secondary containment of the fluid in the valve and to
prevent leakage to the outside environment from the valve
body. The lower part of the body has a plug, which can be
opened to check for sleeve failure.
Harmful substance hazard.
In case of a sleeve failure, slight leakage will occur
through the bushings.
If you open the plug for checking, be careful as the
medium may flow out.
10
plug
CAUTION!
Changing the sleeve at appropriate intervals
prevents leakages.
Actuators
Manual
Manual gear operated valves are closed by turning clockwise.
Pneumatic
The pneumatic actuator is designed for a nominal supply of
6 bar. Use correct sized pneumatic hoses to ensure sufficient
air flow.
The air must be clean, dry, lubricated and properly filtered.
An air quality of minimum requirement to ISO 8573-1:2010
[7:4:4] is recommended. If any component used on the valve
has a stricter requirement (pressure rating, air quality), the
stringent shall prevail.
Noise hazard.
Pneumatic actuator noise level can exceed 85 dB
and cause an injury.
Use ear protectors when working near the valve.
Hydraulic
Hydraulic actuators have a nominal supply pressure of 150
bar (2250 psi). The recommended hydraulic fluid is mineral
oil. For more information, refer to OEM datasheet.
Electric
Electric actuators have open/close limit switches preset
at the factory. A separate instruction from the actuator
manufacturer is always included in the shipment.
Consult the manufacturer's instructions on actuator
requirements or/and limitations. If actuator is changed or
valve needs adjustment, follow the Maintenance instructions.
Make sure that the 3-phase electrical connection is done
correctly. If the connection is done wrong, the limit or torque
switches will not trigger as designed. This will allow the
actuator to move beyond limits and cause damage to the
valve.
CAUTION!
4PV70EN - 5/2023
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