Specifications

WESTLOCK CONTROLS CORPORATION
280 N. MIDLAND AVE., STE. 258, SADDLE BROOK, NJ 07663 TEL: [phone] FAX: [phone]
westlockcontrols.com
4/7/10 TECH-382/D.W.O. 17072 Page 4 of 15
terminals, conduit entries and wiring codes permit. The Falcon integral
solenoid valve is an air piloted solenoid valve system incorporating elastomer
static seals through which a shaped spool moves and are manufactured for 3-
or 4-way operation. 3-way is normally used for pilot control of the other relay
valves or for the operation of single acting cylinders. 4-way is normally used
to control the action of double acting cylinders.
1.4. Principles of Operation
A Quantum control monitor mounts to an actuator via a mounting kit, usually
sold separately. The unit shaft couples to the actuator shaft directly via
NAMUR adaptation, or via a coupling provided in the mounting kit. The
Quantum’s integral Falcon solenoid-piloted directional control valve provides
an air signal to the actuator to change its state, thus controlling the actuated
valve. An electrical signal from the control system actuates the integral
solenoid valve system in the Quantum. In a typical, normally closed, spring-
return Falcon valve, the spool controlling the direction of air flow is moved by
pressurized pilot air acting on a piston when the coil is energized. The spool
is returned to the normally closed position by a spring, and the piston is
vented to atmosphere. The spool may be manually moved to control air flow
direction with override options. The pilot air supply is normally routed
internally from the air supplied to Inlet port 1. Power is supplied separately to
pre-wired coils via the terminal strip in the Quantum. As the actuator rotates
the unit shaft, adjustable cams on the shaft actuate mechanical or proximity
switches inside the unit enclosure, at the limits of rotary travel set by the
customer. The switches are pre-wired to the terminal strip in the enclosure,
permitting easy connection of switch output to external electrical control
monitoring systems or indication devices. The visual Beacon indicator on the
enclosure cover indicates 90 rotary travel between OPEN and CLOSED
valve positions, unless ordered optionally for other angular strokes or 3-way
valve applications.
1.5. Special Features/Conditions
To avoid build-up and discharge of static electricity in a hazardous area, only
clean Westlock units with a static-free cloth dampened with water. Avoid the
use of alcohol-based cleaners.
2. Ordering
Ordering guides for all Quantum product series and spare Falcon valve
assemblies and stand-alone valves for use outside an integrated Westlock
Controls monitor covered by this IOM are available through a local Westlock
distributor, the current Westlock Controls catalog literature or the Westlock
Controls website at westlockcontrols.com. Spare parts lists for refurbishments
or repairs are also available for common Quantum models.