29/4/06
TECHUK-23 REV 0
Page 3 of 6
Installation & Operating Instructions
Westlock Accutrak / Quantum 2800
With Optional MAGNUM Proximity Switches.
Figure 2
Figure 1
Figure 4
Figure 3
Figure 5
Operating and Maintenance Instructions for
Quantum Falcon Solenoid Valve
General Description
The Falcon solenoid valve incorporates 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.
The seal spacer assembly forms individual annular chambers opposite each valve port and the grooved spool either closes or allows flow
between adjacent chambers, hence the position of the spool determines which ports are open or closed.
The spool is moved by way of a manually or mechanically operated mechanism normally against a return spring. Operation may be by
application or removal of a pilot air supply acting as a pilot piston. This form of control is utilized for electrical actuation where integral
solenoid valves control the pilot air supply.
Optional Features
N - No-Voltage Release (Latching)
With the coil first energized, the palm button is then manually moved and latched. The inward movement of the palm button causes the
valve to shift. When the coil is de-energized, the palm button and latching mechanism are automatically tripped, allowing the valve to
return to its original position. (1.2 Cv Valves only) See Fig. 1
R - No-Voltage Release (Non-Latching)
With the coil first energized, the palm button is then manually moved. The inward movement of the palm button causes the valve to shift.
When the coil is de-energized, the palm button automatically returns to its original position. (1.2 Cv Valves only) See Fig. 2
L - Manual Locking Override
Manually depress palm button and rotate clockwise for maintained con-
dition, must manually disengage to return to original position. See Fig. 3
M - Momentary Override
Spring return momentary pushtype, must hold in to actuate. See Fig. 4
E - External Pilot
The 1/8
”
NPT external pilot connection requires a separate auxiliary
pressure line to the valve. This feature should be used when the con-
trolled pressure is below the minimum 45 psi operating pressure.
H - Hex Drive Maintained Override
Insert allen key in hex head screw and rotate clockwise (4-5 turns) to
shift spool. Valve will stay put until hex head screw is rotated counter
clockwise (4-5 turns) back to original position. See Fig. 5
WESTLOCK CONTROLS UK Ltd.
22 CHAPMAN WAY, TUNBRIDGE WELLS, KENT, TN2 3EF, ENGLAND. TEL: 44 (0)1892 516277 FAX: 44 (0)1892 516279
