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VCIOM-05081 Page 5 of 8Copyright © Westlock. All rights reserved
2600 SERIES ATEX AND IECEx CERTIFIED
InstallatIon and operatIng InstructIons
5.1.2Optional features - Falcon II
5.1.2.1 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.
See Figure 4A.
5.1.2.2 Manual locking override
Manually depress palm button and rotate
clockwise for maintained condition, must
manually disengage to return to original
position. See Figure 4B.
5.1.2.3 Momentary override
Spring return momentary push type, must
hold in to actuate. See Figure 4C.
5.1.2.4 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 Figure 4D.
5 OPERATING AND MAINTENANCE
INSTRUCTIONS FOR FALCON SOLENOID
VALVES. (QUANTUM CONTROL MONITORS
ONLY)
5.1 General description
5.1.1
The Falcon II solenoid valve incorporates
elastomer static seals through which a
shaped spool moves and are manufactured
for 3 or 5 way operation. 3 way is normally
used for pilot control of the other relay
valves or for the operation of single acting
cylinders. 5 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.
FIGURE 4
4 PRODUCT REPAIR AND SERVICE
4.1 Inspection of this product shall be
carried out by suitably trained personnel
in accordance with the applicable code
of practice such as EN60079-17 or
IEC 60079-17.
4.2 In the event of any repairs that may be
required such tasks must be carried out
by suitably trained/competent personnel
in accordance with the applicable code
of practice such as EN60079-19 or IEC
60079-19.
4.3 The certification of this product has
been approved based on the material of
construction as per the drawings listed
in the schedule within this certificate.
Any replacement parts that are not made
in accordance to the listed drawing will
invalidate the approval / certification.
4.4 Replacement parts must be purchased
through Westlock Controls or via an
approved Westlock Controls distributor.
3.10 The 2600 series valve control monitor has
the option for position feedback by the
means of a resistive signal (RS) or current
signal (CS) transmitter.
The RS transmitter electrical ratings are -
1 K Ohms (standard) or 5 K or 10 K Ohms
(optional).
The CS transmitter electrical ratings are -
current loop 4-20mA at 18 to 24V DC.
See separate installation & operating
instructions VCIOM-04112
3.11 Before replacing the enclosure cover,
ensure that both of the housing and cover
threads are clean and undamaged. Screw
the cover onto the housing ensuring that
it is not cross threaded and turns freely.
Continue tightening the cover until metal
to metal condition is achieved between the
bottom edge of the cover and the housing
surface.
Lock the cover as follows:
Using a 3mm A/F Allen key / wrench, rotate
the Jack screw in an anti-clockwise direction
until sufficient pressure has been applied to
the bottom edge of the cover to prevent the
cover from being removed by hand.
