Gasmizer Manual - Submarine Manufacturing and Products Ltd

March 2009
4.8 Water Trap Inspection and Maintenance
4.8.1 The water trap should be dismantled and the condition of the O-rings on the plunger
checked and renewed if necessary. The interior of the water trap should be cleaned with fresh
water and detergent.
4.8.2 Similarly, any discolouration of the BPR flow meter may be removed by rinsing in fresh
water.
4.9 SAECO Valve Adjustment
4.9.1 Check the setting of the SAECO valve. This may be done without removing the valve
from the water trap assembly, by monitoring the diver supply gas pressure in the bell while
carrying out the following checks.
1. Increase the supply pressure to 50 psi. At this pressure, the valve should remain
closed (that is, the indicating plunger should be down).
2. Increase the supply pressure to 90 psi. The valve should now be fully open
(indicator rod emerging from the top of the valve housing).
3. Reduce supply pressure to 50 psi. Valve should again be closed.
4.10 Relief valve Adjustment
Bell Equipment Maintenance Schedule
Every 500 Hours
Next Due________Hrs.
Dismantle, clean and inspect water trap (See Section 4.8).
Every 3 Months
Next Due________Hrs.
Check operation of SAECO valve and bell equipment relief valves (see Sections 4.9 4.10).
4.10.1 Remove each relief valve from the system and check their function by connecting
directly to a suitable gas supply. Valves should be set as follows:
Umbilical relief
Water trap over Pressure relief valve
Water trap negative Pressure relief valve
Inward relieving valve at 3.5 bar (50 psi.)
Outward relieving 2 bar (30 psi)
Inward relieving 3.5 bar (50 psi)
4.11 BPR Maintenance
4.11.1 The BPR loader requires little or no maintenance. In the event of malfunction is should
be returned to the factory for repair.
Chap 4 Page 29 of 168 OM002 Rev 5