Brochure

Fluid and Ambient Temperature
Valve Leakage
Ambient temperature [°C]
−10 to 50
Fluid temperature [°C]
1 to 50
FKM
Seal material Leakage rate
Note)
10
−6
Pa·m
3
/sec or less
FKM
Seal material Leakage rate
Note)
10
−6
Pa·m
3
/sec or less
Configuration symbol (Application example)
Used with vacuum Used with pressure
Model/Valve Specifications
N.C.
Note) With no freezing
Internal Leakage
External Leakage
Note) Leakage (10
−6
Pa·m
3
/sec) is the value at differential pressure
0.1 MPa and ambient temperature 20°C.
Normally Closed (N.C.)
Port sizeSize
Orifice
diameter
[mmø]
Model
Maximum operating
pressure differential [MPa]
Used with
vacuum [Pa·abs]
Pressurized port 1
0.1 to
atmospheric
pressure
1.0
1.6
1.6
2.3
3.2
M5
M5, 1/8
C [dm
3
/(s·bar)]
b
0.04
0.07
0.07
0.18
0.30
0.40
0.25
0.45
0.45
0.38
0.14
0.30
0.30
0.58
1.10
Cv
Flow-rate characteristics
VDW14
VDW24
Weight
[g]
0.9
0.4
0.7
0.4
0.2
Brass: 65
Stainless steel: 60
Brass: 115
Stainless steel: 100
1
2
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.
2
1
2
1
Single UnitFor Medium Vacuum
Series VDW
4