Περιγραφή
Combining the iconic design of the original D-Series regulators with the latest
advances in breathing performance technology, SCUBAPRO engineers have created a
21st century regulator in terms of quality, reliability, performance and style. The D420
features a balanced valve inside a housing supported by a full metal structure. Called
the Progressive Flow Control Valve, it is able to deliver abundant airflow for the best
breathing performance, with a natural smoothness comparable to what you might
experience breathing on the surface. The uniquely shaped fiberglass-reinforced nylon
casing is ultra-durable and allows the LP hose to be connected on either the right or
left side for maximum rigging flexibility. A dive/pre-dive system includes a switch on
the top of the casing with a thumb tab for adjusting the direction of airflow right out
of the valve. The highly efficient purge button is a technical jewel based on a concept
that gives the D420 its unique face. Teamed with the venerable MK25 EVO balanced
piston first stage, this is a regulator system purpose-designed for today’s avid divers
and SCUBAPRO brand enthusiasts everywhere.
MK25 EVO FIRST STAGE
◊ Air balanced flow-through piston in a chrome-plated marine-grade brass body
provides constant and effortless airflow unaffected by depth, tank pressure, or
breathing rate
◊ Patented XTIS (Extended Thermal Insulating System) fully insulates the inner
mechanism from the environment, improving cold-water resistance by 30% and
delaying ice formation in extreme cold-water conditions without compromising
breathing performance. Key insulation system components are visible in blue.
◊ Anti-freeze protection radically increases breathing reliability when diving in the
most extreme water temperatures.
◊ Two opposing high-pressure ports allow the first stage to be positioned either up
or down.
◊ Four high-flow and one axial super high-flow low pressure ports on a swivel turret
maximize hose routing options.
◊ External intermediate pressure adjustment enables technicians to fine-tune
performance quickly and easily.
◊ Weight: INT 232, 790g; DIN 300, 572g.
◊ Airflow at 2900psi/200bar: (l/min/SCFM): >8500/301.
◊ Intermediate pressure (psi/bar): 133-142/9.2-9.8.
D420 SECOND STAGE
◊ Uniquely shaped fiberglass-reinforced nylon casing carries on the D-Series
heritage with the latest advances in breathing performance technology.
◊ Air-balanced Progressive Flow Control Valve is able to deliver abundant airflow with
a natural smoothness comparable to breathing on the surface.
◊ Dive/pre-dive system includes a switch on the top of the case with a thumb tab for
adjusting the direction of airflow right out of the valve.
◊ Casing design features inner winglets that direct airflow towards the exhaust valve,
creating a dramatic improvement in exhalation effort.
◊ Diaphragm is located in the lower section of the casing to take advantage of the
pressure gradient in the upright position, making breathing even easier.
◊ Reversible hose attachment allows for either left- or right-side LP hose
connections for maximum rigging flexibility.
◊ Large purge button is easy to reach and press, with or without gloves.
◊ Exhaust tee is compact and efficiently deflects bubbles from the diver’s view while
enhancing ease of exhalation.
◊ Super-flow hose features an oversized bore that allows more air to flow on each
inhalation.
◊ Compact Hi-Flow mouthpiece improves airflow as well as mouth comfort, fitting all
mouth sizes, from largest to smallest.
◊ CE certified according the latest EN250A European Standards for all diving
conditions, including extreme cold water.
◊ Weight (without mouthpiece): 216g.
◊ Airflow at 200bar: 1800 l/min – 64 SCFM.
