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Engineered for extreme performance in demanding environments, the Apeks DB4+ 1st Stage (DIN) is a rugged, environmentally sealed over-balanced diaphragm regulator. Designed with cold-water reliability in mind, the DB4+ utilizes an environmental dry seal system to keep ice crystals and contaminants completely isolated from the internal mechanism. Its over-balanced diaphragm technology delivers progressively higher intermediate pressure as depth increases, ensuring breathing resistance remains effortlessly light at any depth.
Environmental Dry Seal & Over-Balanced Performance
Features an environmentally sealed dry chamber that prevents water contact with the main spring, dramatically reducing the risk of freezing in cold Canadian waters while protecting internal components from silt, salt, and debris.
Features and Benefits
- Over-Balanced Diaphragm Design: Intermediate gas pressure increases faster than ambient depth, ensuring exceptionally high gas flow and effortless breathing performance at extreme depths.
- Environmental Dry Seal System: Prevents internal freezing and shields delicate internal components from silt, sand, and saltwater corrosion.
- 4 Low-Pressure (LP) Ports: Angled LP ports optimize hose routing for single-cylinder, twinset, or stage bottle configurations.
- 1 High-Pressure (HP) Port: Precision-placed HP port allows seamless transmitter or submersible pressure gauge (SPG) integration.
- Heavy-Duty Metallic Chrome Finish: Forged brass body coated in polished chrome provides superior durability against cold-water corrosion and impacts.
- 300 Bar DIN Connection: Threaded 300 bar DIN handwheel ensures a high-pressure, secure cylinder connection favored by technical and cold-water divers.
Technical Specifications
| Brand | Apeks Marine Equipment |
|---|---|
| Product Model | DB4+ 1st Stage |
| First Stage Mechanism | Environmentally Sealed Over-Balanced Diaphragm |
| Connection Type | DIN 300 Bar (Threaded) |
| Low Pressure (LP) Ports | 4 x 3/8" UNF LP Ports |
| High Pressure (HP) Ports | 1 x 7/16" UNF HP Port |
| Cold Water Rating | Yes (EN250A Certified for Extreme Cold Water) |
| Best For | Cold Water Scuba Diving, Stage Bottles, Technical Diving, & Backup Regulators |
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