Heat-exchanging ribs, seven ports and a reversible second stage
Apeks calls EVX Tungsten the evolution of 50 years of its technical expertise, combining state-of-the-art regulator technology with rugged good looks and durability, and names maximum thermal performance, super-smooth breathing and advanced ergonomics as what sets it apart. The over-balanced first stage has a brass body with heat-exchanging ribs and seven ports; the reversible second stage has a large breathing-effort adjuster that is easy to use in cold water while wearing gloves. Designed and manufactured in the UK.
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A brass body with heat-exchanging ribs, plus a ribbed diaphragm clamp for better heat exchange in cold water. As you descend, the over-balanced design raises the medium pressure in the hose faster than ambient, which Apeks says gives superior performance at depth.
Five MP ports improve hose orientation and two angled HP ports suit hose routing and transmitters. The ACD system keeps water out of the first stage, and a double swivel hose gives more freedom of movement and comfort.
Reversible for a left- or right-hand gas supply, with a large breathing-effort adjuster that is easy to use in gloves in cold water. It also has a laminar flow valve, a two-stage progressive purge button, a venturi lever and a Comfo-bite mouthpiece, and its heat exchanger draws in warmth from the water for a more comfortable breath.
Change between a small and a large exhaust tee yourself; the regulator comes with both sets.
Apeks lists the same core features for both: an over-balanced first stage, 5 MP and 2 angled HP ports, a reversible second stage with a large breathing-effort adjuster, a laminar flow valve, two sets of exhaust tees, EN250A cold-water certification and nitrox up to 40% when new (21% in Europe). Apeks' page does not explain what 'Tungsten' refers to, and EVX Tungsten comes in one colour, black. Still deciding? Ask us on LINE.
It is how the first stage connects to the tank valve, so match the valves you dive with. EVX Tungsten comes in both DIN and INT (yoke). Not sure? Ask us on LINE.
Apeks lists it as certified for cold-water use (EN250A), with the environmental dry kit as standard. The first stage has heat-exchanging ribs and a ribbed diaphragm clamp, the second stage has a heat exchanger, the nylon braided hose, Apeks says, performs better in cold water than traditional rubber hose, and the large adjuster is easy to use in gloves.
Yes. Apeks made the second stage reversible, for a gas supply from either the left or the right.
Apeks lists it as compatible up to 40% O₂ when new, out of the box (21% in Europe). Planning to dive nitrox? Ask us first.
