Component Descriptions
06-237619-001 2-31 April 2020
2-8.4.1.1 Lever/Pressure Operated Control Head, P/N 82-878751-000
The Lever/Pressure Operated Control head allows manual operation and pressure actuation
(see Figure 2-38) of a nitrogen pilot cylinder. The lever/pressure operated control head is self-
venting to prevent accidental system discharge.
Use the lever/pressure operated control head on the nitrogen pilot cylinders used for pneumat-
ic sirens. The control head can be fired by the same nitrogen pilot cylinder that drives the dis-
charge delay, but allows the sirens to be driven by their own dedicated nitrogen supply. The
lever offers a manual override option if necessary.
Figure 2-38. Lever/Pressure Operated Control Head
WARNING
Before resetting the lever/pressure operated control head, all pressure must be
relieved from the cylinder and actuation lines.
Pressure can be relieved from unvented actuation tubing by loosening the
fitting on the control head slightly and allowing the line to bleed out completely.
Failure to perform this action can result in damage to the control head.
When attaching the Lever/Pressure operated control head to the valve, the
swivel nut must be tightened to a torque of 55ft·lb. Failure to tighten the swivel
nut may result in leakage during actuation.
CLOSED
OPEN
TO OPEN
LEVER
SAFETY PIN
SEAL WIRE
PISTON
BODY
1/8 in. NPT PRESSURE
INLET
SET
OPERATED
1.250-18 UNEF-3B
4.50 in.
(114.3 mm)
3.00 in.
(76.2 mm)
ALLOW APPROX. 2 in. (51 mm)
CLEARANCE FOR
OPERATION OF LEVER
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