Brochure

Fluid and Ambient Temperature
Valve Leakage
Configuration symbol
Ambient temperature [°C]
−10 to 50
Fluid temperature [°C]
1 to 50
NBR
Seal material Leakage rate (Water)
Note 2)
0.1 cm
3
/min or less (Brass, Stainless steel body type)
1 cm
3
/min or less (Resin body type)
NBR
Seal material Leakage rate (Water)
Note 2)
0.1 cm
3
/min or less (Brass, Stainless steel body type)
1 cm
3
/min or less (Resin body type)
Model/Valve Specifications
N.C.
Note) With no freezing
Internal Leakage Note 1) Internal leakage when pressure is supplied to Port 1 (IN).
External Leakage
Port sizeSize
Orifice
diameter
[mmø]
Model
Maximum operating
pressure differential [MPa]
0.9
0.4
0.7
0.4
0.2
1.0
1.6
1.6
2.3
3.2
M5
M5, 1/8
1
2
AV (x10
-6
m
2
)
0.04
0.07
0.07
0.18
0.30
0.96
1.70
1.70
4.30
7.20
Conversion Cv Pressurized port 1
Flow-rate characteristics
VDW12
VDW22
Weight
[g]
Single UnitFor Water
Note 2) Leakage is the value at ambient temperature 20°C.
Resin Body Type
Port size
Size
Orifice
diameter
[mmø]
Model
0.9
0.4
0.7
0.4
0.2
1.0
1.6
1.6
2.3
3.2
M5
ø3.2
One-touch fitting
ø4 One-touch fitting
M5
ø4 One-touch fitting
ø6 One-touch fitting
1
2
Pressurized port 1
Flow-rate characteristics
VDW12
VDW22
Weight
[g]
Refer to “Glossary of Terms” on page 12 for details on the maximum operating pressure differential.
Normally Closed (N.C.)
Brass, Stainless Steel Body Type
Brass: 65
Stainless steel: 60
Brass: 115
Stainless steel: 100
45
80
Conversion Cv
0.04
0.07
0.07
0.18
0.30
AV
0.96
1.70
1.70
4.30
7.20
Note) The configuration symbol shows ports 1
and 2 as blocked, but there is actually a
limit to the blocking capability when the
pressure of port 2 is greater than the
pressure of port 1. Please contact SMC
when low leakage performance is
required.
21
Maximum operating
pressure differential [MPa]
Series VDW
6