User's Manual

Component Descriptions
P/N 81-CO2MAN-001 2-7 September 2013
2-2.2 Discharge Heads
Each cylinder and valve assembly must be equipped with a discharge head at installation to
actuate the cylinder valve. The discharge head is assembled to the top of the cylinder valve
and contains a spring-loaded piston which when actuated by carbon dioxide pressure is
designed to depress the main check in the valve and discharge the contents of the cylinder.
The piston provides the necessary mechanical advantage to open the valve's main check. The
discharge outlet is designed to mate with a flexible hose or swivel adapter for connection to
the distribution piping. The discharge head also contains an integral stop check whose function
is to automatically prevent the loss of carbon dioxide during system discharge in the event that
a cylinder is removed from the distribution piping. Two different style discharge heads are
available:
• Plain-nut discharge head
• Grooved-nut discharge head
2-2.2.1 PLAIN-NUT DISCHARGE HEAD
The plain-nut discharge head, Part No. WK-872450-000 (Figure 2-6), discharges the contents
of the cylinder upon activation of its associated control head or upon application of pressure
entering through the outlet. The plain-nut discharge head is used on each cylinder (Figure 2-7)
of a multiple-cylinder system.
Figure 2-6. Discharge Head, Plain Nut
3-15/16 in.
(100 mm)
STOP
CHECK
SET
POSITION
OPERATED
POSITION
SWIVEL NUT
(FOR CONNECTION
TO CYLINDER VALVE)
STEM
INNER O-RING
P/N WF-242467-000
OUTER O-RING
P/N WF-242466-000
2-1/2 - 14N3
3/4 in. NPS
DISCHARGE OUTLET
SPRING
BALL CHECK
BALL RETAINER
PISTON
3-13/16 in.
(97 mm)