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
19
Cylinder Control Transfer. (Spool Valve
Shown)
This circuit allows only one cylinder to be operative at a
time. Use of a 3-way valve for transfer control causes the
cylinders to remain in their last position when control has
been transferred (pressure is not exhausted). The use of a
4-way valve for transfer control will cause the cylinder to be
free floating when control has been transferred (pressure is
exhausted).
Cylinder Feed Rate Control with Positive
Lock in any Cylinder Position. (Spool
Valves Shown) (Air over Oil cylinder)
This circuit provides a constant cylinder feed rate for both
directions of travel. In addition, the cylinder will lock in
position when the manual valve is centered. Air provides
the force to move the cylinder; oil, with its feature of non-
compressibility, is used to give smooth cylinder motion.
1
2
14
CYLINDER NO. 1
4
12
3
5
CONTROL
VALVE
1
2
14
CYLINDER NO. 2
4
12
3
5
CONTROL
VALVE
1
3
12
10
2
TRANSFER
VALVE
3-WAY
SHOWN
2 1
10
12
OIL
AIR
CYLINDER
MANUAL
VALVE
12
2
4
3
1
5
14
