User's Manual

Post-Discharge Maintenance
September 2013 7-6 P/N 81-CO2MAN-001
Figure 7-2. 5/8-inch Type “I” Cylinder Valve
7-4 NITROGEN PILOT CYLINDER, 108 CU. IN., SERVICE AND MAINTENANCE
7-4.1 Nitrogen Cylinder Replacement
Replace the nitrogen cylinder when expended or when loss of pressure occurs, as follows:
1. Remove the control head from the nitrogen cylinder valve.
2. Immediately install the protection cap on the nitrogen cylinder actuation port.
3. Remove the flexible actuation hose or tubing and adapter (P/N WK-699205-010) from the
cylinder valve outlet.
4. Remove the clamps and hardware that secure the nitrogen cylinder to the mounting
bracket.
WARNING
Any area in which nitrogen is used or stored must be properly ventilated. A
person working in an area where air has become enriched with nitrogen can
become unconscious without sensing the lack of oxygen. Remove the victim to
fresh air. Administer artificial respiration if necessary and summon a physician.
Never dispose of liquefied nitrogen in an indoor work or storage area.
WARNING
When removing a pressurized cylinder due to pressure loss, the control head
must be in the SET position with the safety pull pin installed. A control head in
the released position will cause the remaining contents of cylinder to discharge
resulting in a system activation which may damage property and cause bodily
injury.
VALVE SEAT
MAIN CHECK
2-1/2 in. - 14 NS-3
(FOR DISCHARGE
HEAD CONNECTION)
SPRING
DISC RETAINER
SAFETY DISC
WASHER
1 in. NPT
TYPICAL CYLINDER
VALVE BODY
SLEEVE RETAINER
PILOT CHECK
SLEEVE
1-1/4 in. - 18 NS-3
(FOR CONTROL
HEAD CONNECTION)
TYPICAL
SIPHON TUBE
SIPHON TUBE STAKED IN PLACE
MATERIALS
VALVE BODY: BRASS
VALVE SEAT: BRASS
SLEEVE: BRASS
SLEEVE RETAINER: BRASS
MAIN CHECK: BRASS WITH RUBBER SEAT
PILOT CHECK: STAINLESS STEEL WITH RUBBER SEAT