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
22
Dual Pressure System. (Spool Valve Shown)
A dual pressure system using a 5-port spool valve can be used to
extend a cylinder with one pressure level and retract the cylinder
using a second (normally lower) pressure. Cost savings of the
differences in the air pressures used can be realized using this
circuit. Port 1 becomes a common exhaust.
Bi-directional Air Motor Control. (Spool Valves
Shown)
A bi-directional motor can be controlled to run in either direction
by using a 4-way 3-position spool valve.
If a 4-way poppet valve is used, a second valve is required for
on-off control of the
air motor.
1
2
14
CYLINDER
4
12
3
5
MANUAL
VALVE
BI-DIRECTIONAL
AIR MOTOR
12
2
4
3
1
5
14
BI-DIRECTIONAL
AIR MOTOR
MANUAL
VALVE NO. 1
1
2
3
10
12
IN
EX
CYL. 1
CYL. 2
2
MANUAL
VALVE NO. 2
POPPET VALVE
