-23-
No. ZK2-OM00201
4. Solenoid Valve
■
Manual override operation
Manual override is non-locking push type. Push the manual override with a screwdriver of a diameter smaller
than indicated in the diagram until it reaches the end.
Confirm that the product operates safety before the manual override is operated.
Note) When valve type R is selected, the supply valve can hold the position and will not switch off even if the supply valve manual
override operation is finished unless the release valve manual override is pressed.
■
Self-holding function of supply valve (Valve type R)
Note 1) 2)
When the supply valve is energized (20 ms or more), the supply valve keep ON position even after
energization is stopped. When release valve is energized, the supply valve is turned off in conjunction with
the operation of the release valve.
Note 1) Main valve in the valve assembly is made of elastic seal. Self-holding is performed by friction resistance of the seal. Do
not apply impact resistance in the direction of the main valve shaft during the installation to moving parts. When impact
is applied, use valve type K. (For vibration and impact, refer to General Specifications on
.)
Note 2) Valve type R cannot use a pressure switch for vacuum with energy saving function.
■
Default setting
When the valve assembly is delivered, the supply valve is on the OFF position, but it may be on the ON
position due to the vibration or impact during transportation or device installation. Turn to the OFF position
manually or by energizing before use.
■
Continuous duty
If a supply valve is energized continuously for a long time, the rise in temperature due to heat-up of the coil
may cause a decline in solenoid valve performance, reduce service life, or have adverse effects on peripheral
equipment. When the energizing time per day is longer than non-energizing time, use valve type R with
Self-holding function.
Supply valve keeps ON position
(Self-holding)
Energization
(20ms or more)
Supply valve
Energization
Release valve
Energization
Vacuum (V) port
Pressure
ON
ON
OFF
Atmospheric
pressure
Achievable
vacuum pressure
OFF
