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Dive safely with high-oxygen mixes using the dedicated Apeks XTX40 Nitrox Regulator Set with DS4 First Stage. Built for divers requiring specialized enriched air nitrox and oxygen setups, this system combines a rugged, environmentally dry-sealed DS4 first stage with a pneumatically balanced XTX40 second stage. Factory cleaned and assembled in an oxygen-clean environment, it features an European EN144-3 M26 connection thread for strict safety compliance.
100% Oxygen Clean & M26 Dedicated Connection
Specially manufactured using oxygen-compatible components and lubricants, allowing safe use with 100% pure oxygen or high-EANx deco mixes out of the box. Equipped with a dedicated M26 thread connection to prevent accidental attachment to standard compressed air cylinders.
Features and Benefits
- Factory 100% Oxygen Cleaned: Prepared with specialized oxygen-compatible materials and O-rings for maximum safety with rich nitrox and stage bottles.
- DS4 Dry Sealed First Stage: Over-balanced diaphragm design with an environmental dry seal isolates working components from water, mud, and contaminants.
- Pneumatically Balanced XTX40 Second Stage: Offers smooth, low-effort gas delivery across varying depths and cylinder pressures.
- Reversible Second Stage Hose Routing: Can be converted from right-handed to left-handed hose configuration by an authorized technician for custom stage or sidemount setups.
- Adjustable Venturi Control Switch: Glove-friendly Venturi lever prevents surface free-flows during stage bottle drop/pickup while ensuring maximum airflow underwater.
- Comfo-Bite™ Ergonomic Mouthpiece: Reduces jaw fatigue during long decompression stops with its upper-jaw bridge design.
Technical Specifications
| Brand | Apeks |
|---|---|
| Model Name | XTX40 Nitrox with DS4 First Stage |
| First Stage Type | DS4 Over-Balanced Diaphragm with Environmental Dry Seal |
| Port Configuration | 4 Low-Pressure (LP 3/8" UNF) Ports & 1 High-Pressure (HP 7/16" UNF) Port |
| Connection Thread | Dedicated M26 Thread (EN144-3 Nitrox / Oxygen Standard) |
| Second Stage Type | Pneumatically Balanced Downstream Valve |
| Oxygen Compatibility | Factory Cleaned & Suitable for 100% O2 / High-EANx Mixes |
| Cold Water Rating | Yes (EN250A Certified Cold-Water Performance) |
| Best For | High-Oxygen Decompression Stage Bottles, Nitrox Diving, & Technical Diving Setups |
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