Gasmizer Manual - Submarine Manufacturing and Products Ltd

March 2009
4.2.3 If the diver gas supply pressure falls below a predetermined value, the springs will
force the piston closed. An indicator is provided to show the status of the valve.
Fig 3
SAECO Valve Closed
4.2.4 The SAECO valve should be adjusted so that it is fully closed when the gas supply
pressure falls to 3.4 bar (50 psi) when bench tested on the surface. In practice the SAECO
valve will close fully at higher supply pressures as a result of the negative pressure in the
exhaust line. The adjustment procedure is described in Section 4.3.
4.3 Water Trap
4.3.1 The function of the water trap is to collect any free water, which may have entered the
exhaust circuit. The water trap assembly is described in the diagrams overleaf.
4.3.2 The water trap consists of an acrylic housing, a negative pressure gauge, overpressure
relief valve, negative pressure relief valve, drain valve and isolating valve. The acrylic body
should be mounted in a prominent position in the bell, giving the bellman an unobstructed view.
The isolation valve enables the lower part of the water trap to be isolated from the upper section
and vented by one simple operation, allowing the water trap to be drained without interrupting
gas recovery.
Chap 4 Page 23 of 168 OM002 Rev 5