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XS Scuba Valves Service Manual
Reassembly Procedure
1. Install Inlet (Neck) O-ring(3)
A. Install a lubricated inlet o-ring(3) onto the valve
neck. A Buna-N o-ring is good for compressed
air use only, a viton o-ring is required for oxygen
enriched mixtures 21.5% - 40% pre-mixed.
2. Mount the Valve
A. Mount the valve into the valve tester or an empty
scuba cylinder.
3. Insert Seat Assembly(5)
A. Using the stem(7) as a tool, or needle nose pliers,
install the seat assembly(5) CW until it contacts the
crown orifice inside.
4. Install Bonnet O-ring(17) on the Bonnet(10)
5. Install Stem O-ring(8)
A. Install a lubricated stem o-ring(8) on to the stem(7).
