Apeks XTX50 DST – Reliability and Performance for Every Dive

The Apeks XTX50 DST is a full-featured regulator designed for those who demand uncompromising durability, comfort, and performance. The overbalanced DST first stage with a swiveling turret is paired with a pneumatically balanced XTX series second stage, ensuring smooth and controlled breathing from the surface to maximum depth. Designed and manufactured in the United Kingdom.

🔵 First Stage – Overbalanced DST with Swiveling Turret

• Overbalanced diaphragm design: The DST first stage delivers an intermediate pressure that progressively increases with depth, ensuring maximum breathing performance even in the most demanding dives.
• Swiveling turret style: The 4 MP ports are mounted on a rotating turret, which reduces hose strain and allows for optimal hose routing, eliminating tight bends and improving overall comfort.
• Environmentally sealed system (Dry Kit standard): The dry chamber prevents water from coming into contact with the main spring, preventing freezing in cold water and protecting internal mechanisms from silt and contaminants.
• Trivalent chromium finish on marine brass: Trivalent chromium requires less energy than traditional chromium and is more environmentally friendly, without compromising corrosion resistance.
• Dust cap: Protects the first stage inlet from water and debris when not in use.
• 2 HP ports (7/16" UNF) and 4 MP ports (3/8" UNF) on the turret.
• Available in DIN and INT (A-clamp) versions.

🔵 Second Stage – Pneumatically Balanced XTX

• Pneumatic balancing: Inhalation effort remains constant and reduced regardless of depth and residual cylinder pressure, for consistently natural breathing.
• Progressive purge button: Large and easy to operate even with gloves, it allows precise control of airflow — side pressure for a reduced and controlled purge (ideal for inflating an SMB), central pressure to maximize the purge effect.
• Adjustable Venturi lever: With a soft rubber grip, it stops internal airflow to prevent accidental free-flows on the surface (– position) and optimizes breathing underwater (+ position).
• Inhalation effort control knob: Allows precise adjustment of valve sensitivity according to current conditions and diver preferences.
• Diver Changeable Exhaust (DCE): Supplied with 2 sets of exhaust tees, allowing you to choose between a compact configuration or one with optimal bubble deflection — replaceable without tools.
• Patented heat exchanger: Surrounds the valve mechanism and dissipates the cold generated by gas expansion, drawing heat from the surrounding water — essential for cold water diving.
• Silicone exhaust valve: Reduces exhalation resistance, improving overall breathing performance.
• Patented Comfo-Bite™ mouthpiece: Ergonomic design virtually reduces jaw fatigue during prolonged dives, ensuring a more comfortable and stable grip.
• Reversible barrel: The second stage can be easily converted for right or left-hand hose routing, without tools.
• Active antimicrobial protection: All molded parts contain an additive that combats fungi, bacteria, viruses, molds, yeasts, and algae — ideal for shared use or rental.
• Flexible braided hose included.

📋 Technical Specifications

• Connections: DIN / INT (A-clamp)
• First stage: Overbalanced diaphragm, environmentally sealed (Dry Kit standard)
• Body: Swiveling turret with MP ports
• HP ports: 2 × 7/16" UNF
• MP ports: 4 × 3/8" UNF
• Finish: Trivalent chrome on marine brass
• Second stage: Pneumatically balanced
• Orientation: Right/left configurable
• Heat exchanger: Yes (anti-freeze)
• Cold water use: Yes
• WOB (Work of Breathing): Average 0.70 J/L
• Nitrox compatibility: Yes up to 40% O₂ (standard) / 100% O₂ cleanable
• Weight: INT 1,269 g / DIN 1,139 g
• Certification: EN250 / CE (PPE Category III)
• Origin: Designed and manufactured in the United Kingdom
• Packaging: No single-use plastic

✅ Who it's for

The XTX50 DST is the ideal choice for:

• Advanced and technical divers who dive in cold water or demanding conditions
• Those seeking a versatile regulator with optimal hose routing thanks to the swiveling turret
• Dive centers and schools that need reliable, hygienic, and easy-to-maintain equipment
• Divers who are sustainability-conscious, thanks to the trivalent chromium finish and plastic-free packaging