When the cylinder in use has been depleted to approximately 500 psi (35 bar), the low pressure
warning alarm will sound, indicating that the cylinder needs to be replaced.
To change a cylinder while the PORTA-PAK
1. Open the second cylinder and note the gauge pressure to assure that it is full.
2. Close the drained cylinder and open the corresponding bleeder valve to relieve pressure
on the hand tight nut.
3. Remove the drained cylinder and install a full cylinder in its place. Connect CGA-347
hand tight nut to the cylinder valve. Close the bleeder valve on the connect whip, it is
now ready for use when the other cylinder pressure descends to 500psi (35 bar).
Note: The system is equipped with check valves that will prevent back flow from the other
cylinder in use.
Make sure all personnel have egressed the hazardous area and have disconnected from the breath-
ing air system.
1. Close cylinder valves.
2. Depressurize manifold by pulling the relief valve ring out.
3. Close the regulator by turning the control knob counterclockwise.
4. Disconnect airline hoses and reinstall dust caps.
5. Remove connections from cylinders and reinstall cylinder valve covers, if applicable.
H
IGH
Monthly
1. Check regulators, gauges, and valves for external leakage.
2. Inspect cylinder valves for proper closure.
3. Check cylinder pigtails for cleanliness, flexibility, wear, leakage, blisters on hose, thread
damage, and O-rings on CGA fittings. Replace damaged items immediately.
Annually
1. Check relief valves pressure setting.
2. Check regulator function by opening and closing regulator valve knob fully.
Every 4 years
1. Replace all flexible pigtails--consult factory.
P
A
RESSURE
IRLINE
-6-
O
PERATION
TM
is still in use:
S
HUTDOWN
G
M
ENERAL
AINTENANCE
& I
NSPECTION