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! Warning
Please consult with SMC in cases where the ambient environment does not permit leakage
①
or if fluid other than air is used.
When exhaust piping is connected to the exhaust port (3), select a model with an effective
②
sectional area not smaller than that in the table below.
Model
VHS20
VHS30
Do not apply negative pressure. It may result in malfunction.
③
! Warning
1
In some cases, mineral oil grease used for internal parts and sealant may be carried to the
output side.
Please contact SMC if this causes any inconvenience in use.
! Warning
1
Confirm the symbols "1" and "2" before the valve is connected. The port marked "1" is the air
inlet and the port marked "2" is the outlet. Pressurization is only possible via the inlet port (1).
Reverse connection may cause malfunction. The port symbols and corresponding piping
types are shown in the table below:
Port Symbol
1
2
3
! Caution
1
The valve must be switched to each position instantly and securely.
Stopping the knob between the extreme positions may cause malfunction.
2
Do not remove the mounting screws from the knob because this may cause malfunction.
Design
2
Effective area mm
(Cv )
5 (0.27)
5 (0.27)
Selection
Installation and Adjustment
Piping type
Inlet
Outlet
Exhaust
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