Zeagle Onyx II Regulator Yoke
By Zeagle | Dry Environmentally Sealed | Air-Balanced 1st & 2nd Stage | Cold-Water Rated
Cold-water breathing has never been so effortless. Building on the proven heritage of the original Onyx, the Zeagle Onyx II Regulator delivers ultra-smooth airflow and extreme environmental protection engineered specifically for temperate and cold Pacific Northwest diving conditions.
The internal structure of the Onyx II first stage is optimized for direct, low-turbulence air delivery. Featuring a dry environmental seal with a hydro transmitter, a precision high-pressure stainless steel valve, and an anodized aluminum heat sink on the second stage, this setup effectively resists ice formation and internal contamination on demanding deep dives.
Dry Environmental Seal & Anti-Freezing Heat Sink
Engineered for cold water reliability, the dry environmental seal isolates internal mechanical parts from freezing temperatures, silt, and salt buildup. On the second stage, an anodized aluminum heat sink dissipates cold generated by expanding air to protect against second-stage icing.
Key Performance Features
- Air-Balanced Diaphragm First Stage: Maintains effortless, consistent breathing delivery regardless of depth or cylinder pressure.
- Dry Environmental Sealing System: Prevents internal freezing and shields internal components against ice crystals and debris.
- 5 Low Pressure (LP) & 2 High Pressure (HP) Ports: High-performance port layout offers ideal routing options for drysuit hoses, octos, and transmitters.
- Diver-Adjustable Second Stage Controls: Inhalation effort adjustment knob plus dive/pre-dive Venturi control switch prevent unwanted surface freeflows.
- Lightweight Braided Flex Hose: Standard 30" lightweight braided hose offers high durability, abrasion resistance, and flexibility to reduce jaw fatigue.
- Nitrox Ready Out of the Box: Factory prepped and compatible with Enriched Air Nitrox (EAN) up to 40% O2.
Technical Specifications
| Brand / Model | Zeagle / Onyx II (Onyx 2) |
| First Stage Type | Balanced Diaphragm (Marine-Grade Black Satin Chrome Brass) |
| Environmental Protection | Dry Environmental Seal with Hydro Transmitter |
| Port Configuration | 5 Low Pressure Ports (3/8"-24 UNF) | 2 High Pressure Ports (7/16"-20 UNF) |
| Second Stage Valve | Pneumatically Balanced Downstream Demand Valve |
| Second Stage Adjustments | Inhalation Resistance Control Knob & Venturi Dive/Pre-Dive Switch |
| Cold Water Tech | Anodized Aluminum Heat Sink & Dry Seal Kit Installed |
| Hose Type & Length | Lightweight Braided Flex Hose — 30 inches (76 cm) |
| Nitrox Compatibility | Factory ready for EAN / Nitrox up to 40% O2 |
| Total Weight | 2.75 lbs / 1.25 kg (42.6 oz) |
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