Our policy is one of continued research and development. We therefore reserve the right to amend,
without notice, the specifications given in this document. © 2015 Norgren, Inc.
Simplified Valve Circuit Guide
7
Valve Applications
Air-spring Returned Cylinder (Spool Valve
Shown)
A double acting cylinder can be extended using a manual, push-
pull 3-way valve and retracted with a constant bias air pressure.
The regulator supplying the bias pressure must be a relieving
type and can be set at 10 to 20 % of the pressure being applied
to the blank end of the cylinder. This circuit can be used with
clamping fixtures and anywhere a cylinder can be retracted at a
low pressure.
Tapped Exhaust . (Spool Valve Shown)
The air exhausted from cylinder retraction can be used to do
secondary work such as operating a vibrator or to clean or eject
parts.
One Shot output . (Spool Valves Shown)
The one shot circuit is used to shorten long signals which may
still be actuating a valve when it is necessary to reset the same
valve. The circuit output appears as soon as the limit valve is
actuated and after a delay (determined by volume and restrictor
setting) the output is shut off.
Use of exhaust air
3
12
10
P
s
AIR BIAS
2
1
1
2
3
12
10
VIB.
1
2
3
12
10
1
2
3
12
ONE SHOT
OUTPUT
10
VOLUME OPT.
LIMIT
VALVE
