The optional auto-closure feature (aka ACD) on the DGX Gears XTRA first stage shuts the DIN inlet when not fully engaged on the valve, potentially avoiding the inadvertent introduction of water and other contamination into the first stage. Although the auto-closure feature is popular it is also controversial, some divers who are meticulous with their equipment care feel the auto-closure feature just introduces another potential failure point (causing no breathing gas at all) and prefer the standard 300 Bar DIN inlet fitting. We do not recommend the ACD option for use in technical diving applications, especially where the diver may perform valve shutdown drills.

The Standard DIN Assembly conversion kit can be used to change a DGX Gears XTRA 1st stage from Auto Closure DIN to a Standard DIN simply by removing the ACD assembly (parts D1 through D10) and installing the Standard DIN Assembly. The ACD assembly is removed using a 4mm hex key and a ¾-inch socket wrench. (Reference the DGX Gears XTRA 1st stage service manual Section 4, Step 1 through Step 6 for instructions on removing the ACD assembly.) The standard DIN assembly conversion kit is installed with no lubrication using a ¾-inch socket torqued to {260 in-lbs | 30 Nm} and a 6mm hex key torqued to {170 in lbs | 19 Nm}. Dive Gear Express recommends the DIN conversion be performed by a regulator service technician.

The components in the kit are oxygen compatible and oxygen clean prior to use. If the regulator is intended for use with any gas containing more than 23.5% oxygen, then it should serviced as appropriate according to your technician training for oxygen service procedures. The pamphlet CGA G4.1 "Cleaning Equipment for Oxygen Service", describes the best practices for inspecting and cleaning equipment used in the production, storage, distribution and use of oxygen.

See Product Attachments tab for 1st stage service manual and schematic diagram.