VP31
∗
5 Series
Specific Product Precautions (2)
Be sure to read this before handling the products.
N.C./ N.O. Conversion
To convert valve operation from N.C. to N.O. or N.O. to N.C.,
remove the pilot valve, move the function plate along the gasket,
both top and bottom until the mark
▲ meets N.C. (N.O.)
Please note however, that the N.O. valve functions properly only
when the appropriate pressure is applied to the valve.
N.C./ N.O. conversion
When converting from N.C. to N.O. and vice versa, note that the
equipment to be connected will act reversely.
Light/Surge Voltage Suppressor
Other Precautions
1. Pressure balance among each port
This solenoid valve is pressure-unbalanced type. Operate it
within this pressure range: IN
≥ OUT ≥ EXH. If not operated in
the range, the valve will malfunction.
2. Use as 2 port valve
1. Plug EXH port in case of pressure-in and plug IN port in
case of vacuum use.
2. This valve has slight air leakage and can not be used for
such purposes as holding air pressure (including vacuum) in
the pressure container.
3.
External Pilot
Use external pilot model in the following cases.
- Vacuum or low pressure (0.2MPa or less): Vacuum/Low
pressure type
- Using the valve with supply port external throttle: General
type
- Air pressure of supply port is slow: General type
- Resistance in outlet side is small in case of air blowing or
filling an air tank: General type
Note 1) Keep external pilot pressure within the pressure range
below.
Note 2) Conversion of internal pilot and external pilot can not
be done.
4. Environment
If using the valve in a dusty environment, install a silencer at EXH
port and PE port to prevent dust from entering.
5. Piping (Vacuum Use)
1) Piping in general:
Vacuum pump/
Blower
Tank/
Vacuum pad
Plug (2 port valve)
IN port = Air releasing
Air pressure-in
2) Following the above piping, vacuum passage is switched
between OUT and EXH, therefore, N.C./ N.O. indication on the
function plate and switching of the vacuum passage are
reversed; N.C. (Normally closed) in vacuum passage are
reversed:
“N.C.” indicated on the plate
N.O. in vacuum passage
(Normally open)
“N.O.” indicated on the plate
N.C. in vacuum passage
(Normally closed)
EXH port = (Suction side)
OUT port = (Load side)
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No.VP3145-OMM0002-B
