Datasheet

Extensive applicable fluids
Proper selection wilh body and sealing materials
permits application with a wide variety of fluids
such as air, water, oil, gas and vaccum.
The cylinder operated by
external pilot air
Many variations
The N.C, N.O, and C.O. types have made the screw-in
styles (6A to 50A) and flanges (32F to 50F) into a series.
Selection procedures
Table q Applicable fluid check list
Caution
When fluid permits application of multiple body and sealing material, select the best ones according to the
ambient environment (FPM or EPR seal material for high temperature) and other conditions (corrosion
resistance and viscosity). Contact SMC on other fluids, operating conditions, etc..
Note 1) Some brake oils are not allowed.
Table e Combination of electrical entry and light/surge
voltage suppressor
NBR
: A
FPM
: B
EPR
: C
NBR
: A
FPM
: B
EPR
: C
NBR
: A
FPM
: B
EPR
: C
Body material
Seal material
Fluid
Air (Standard, Dry)
Low vaccum (1 torr)
Carbon dioxide (CO2, 0.7MPa or less)
Carbon dioxide (CO2, 0.7 to 1MPa )
Nitrogen gas (N 2 )
Argon
Helium
Water (Standard, up to 60 ° C)
Water (up to 99°C only air operated)
Turbine oil
Spindle oil
Kerosene
Gas oil
Fuel oil
Brake oil
(1)
Silicone oil
Naphtha
Ethyl alcohol
Ethylene glycol (up to 80
°C)
Boiler water
Copper free
BC6: Standard
Aluminum: L Stainless steel: S
1
2
3
4
5
6
7
6A 8A 10A 15A 20A 25A 32A 40A 50A
Valve
size
Port size
DDL S Z L
Valve
size
1, 2, 3, 4
5, 6, 7
Electrical entry
Indicator light and surge suppressor
Manual override
(Only T)(Except
for DL)
Fluid
Refer to Table q to check that the
desired fluid is applicable.
Select the body and sealing materials
that best suit the fluid to be used.
Flow
characteristics
(Air and water)
 To find the flow rate of air or water, refer to
the table of flow rate charactertics on page 4.2-14.
Use the flow rate calculation equation to find
the exact answer. Although the flow rate is the
same, the operating pressure differs according
to the valve size. Therefore, select the proper
valve size from applicable valves.
 Refer to Table w to select the port size of the
screw-in styles (6A to 50A) and flanges
(32F to 50F).
Construction
 Select the air operated or external pilot
solenoid styles. Valves come in N.C. (normally
closed), N.O. (normally open), C.O. (double
acting), and N.C.1MPa (normally closed)
types. Select the proper one according to
the operating conditions.
Supply voltage
and electrical
entry
(External pilot solenoid)
Select AC or DC power supply, and select
the proper method of electrical entry
according to Table
e.
Air operated
External pilot solenoid
VN
VX
VQ
VDW
VC
LV
PA
4.2-11
Table w Valve size, port size combinations
2 Port Valve for Flow Control
Process Valve
Series VNB