These valves have been designed to mount
directly into the cylinder ports.
The inner design of the blocking valves
Series VBO and VBU allows a very high
flow rate and reliable operation.
The diagram below shows the relation between working pressure and pilot
pressure required in order to operate the valve.
VBU - The opening pressure of the unidirectional valve is 0.3 bar (4.35 psi).
Flow Rate
Flow Q (NL/min.) (SCFM)
N.B.: Q is determined with an inlet pressure of 6 bar (87 psi).
0 to 80°C (with dry air -20°C) (32°F - 175°F, dry air necessary down to - 4°F)
Lubrication
not required, if necessary use oil compatible with Buna-N (3° - 10° E) (ISOVG32 grade)
Pneumatic Data
Operating pressure
VBU: 0.3 - 10 bar (4.35 - 145 psi), VBO: 0 - 10 bar (0 - 145 psi)
Nominal pressure
6 bar (87 psi)
Nominal flow
see graph
Nominal diam.
1/8" Ø5.5 mm (.217") - 1/4" Ø8 mm (.315") - 3/8" Ø11 mm (.433")
Fluid
filtered air, without lubricant* (25 micron or less)
*in the event that lubricated air is used, it is recommended to use oil ISOVG32. Once applied, the lubrication should never be interrupted.
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