XTX40 DS4 DIN Regulator - APEKS

XTX40 DS4 DIN Regulator – APEKS

The Apeks XTX40 DS4 is a regulator that combines the compact DS4 first stage with the pneumatically balanced XTX40 second stage. Its proven design ensures comfortable breathing during recreational and technical dives, even in cold water.

The DS4 first stage features a compact design and a dry chamber that protects the mechanism from water and contaminants. Unlike the DST first stage used in the XTX50 set, the DS4 does not have a swivel head.

Specifications:

• Manufacturer: Apeks
• Model: XTX40 DS4
• Product Code: RG114119
• Connection: DIN
• First-stage type: diaphragm, overcompensated with dry chamber
• HP ports: 1 × 7/16″ UNF
• MP ports: 4 × 3/8″ UNF
• Stage II type: pneumatically balanced
• Venturi effect adjustment: yes
• Breathing resistance adjustment: no
• Mouthpiece: Comfo-bite™
• Hose: flexible braided Flexi-hose
• For cold water: yes
• Standard: EN 250:2014

DS4 First Stage

• Diaphragm design with overcompensation—medium pressure increases with depth faster than ambient pressure, which enhances the regulator’s performance during descent.
• Dry chamber—limits contact between water, sediment, and contaminants and the main spring, and reduces the risk of icing.
• Compact design—a proven first stage highly regarded by technical divers.
• Ports: 1 high-pressure (HP) port and 4 medium-pressure (MP) ports, angled for convenient hose routing.
• Body: chrome-plated brass.
• Connector: DIN.

XTX40 Second Stage:

• Pneumatically balanced mechanism – ensures smooth and comfortable breathing.
• Venturi effect adjustment – a lever allows you to limit uncontrolled airflow, e.g., at the surface.
• Progressive boost button—allows you to control gas flow depending on location and pressure applied.
• Heat exchanger—helps prevent the mechanism from cooling down during gas expansion.
• Comfo-bite™ mouthpiece—designed to reduce jaw fatigue.
• Hose routing can be reversed – configuration can be changed by an authorized service center.
• Replaceable exhaust deflector – allows you to adjust bubble discharge; one deflector is included.

Included:

• Apeks DS4 DIN first stage
• Apeks XTX40 second stage
• Hose