Features:
MK21 First Stage
- Air-balanced flow-through piston provides constant and effortless airflow
unaffected by depth, tank pressure, or breathing rate.
- Polished chrome plated marine grade brass body is close to 20 percent
smaller than the MK25, making it an easy travel companion.
- Unique thermal exchange design with external fins optimizes freezing
resistance.
- Two high pressure ports, one on each side of the body, allows the first
stage to be positioned either up or down.
- Standard "smart" hose routing cap offers four low pressure ports angled
for more convenient hose routing (+/- 20º).
- Optional hose routing cap increases routing configurations with four
angled low pressure ports (0°/30°) plus a fifth centralized high-flow low
pressure port, ideal for technical diving.
- Redesigned yoke allows for easier mounting on a cylinder, and redesigned
cap protects internal components from water intrusion after the dive.
- Available in either 3364psi/232bar INT or 4350psi/300bar DIN
configurations.
- Weight: INT 232 (oz/g): 27.5/780; DIN 300 (oz/g): 19.7/560.
- Airflow at 2900psi/200bar: (l/min/SCFM): >7500/265.
- Intermediate pressure (psi/bar): 133-142/9.2-9.8.
S560 Second Stage
- Air-balanced valve smoothes out the inhalation effort when diving at
varying depths and supply pressures.
- Lightweight techno-polymer casing helps reduce jaw fatigue and improve
diving comfort.
- Technopolymer inlet tube contributes to reliability and long life.
- High flow exhaust valve reduces exhalation effort to lower overall work
of breathing.
- User controls include a diver-adjustable inhalation effort knob and
Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch.
- Super-flow hose features an oversized bore (larger inside hose diameter)
that allows more air to flow on each inhalation.
- Ultra-comfortable orthodontic mouthpiece is easy to grip yet doesn't
inhibit airflow.
- Weight (without mouthpiece): 5.6oz/160g.
- Airflow at 2900psi/200bar: 1850 l/min - 66 SCFM.
Description:
Lightweight and compact, this versatile breather offers superb performance
and value - plus a whole lot more.
The compact and lightweight MK21/S560 is a full-featured reg combo that's easy
to use, offers SCUBAPRO reliability and is priced right, making it the ideal
mid-range system for a variety of diving scenarios.
The MK21 is SCUBAPRO's most compact balanced-piston first stage. Smaller and
lighter than the MK25, it uses a smaller piston but it delivers the same level
of breathing performance, no matter how hard you're breathing, how deep you're
diving or what your pressure gauge reads. The MK21 also provides exceptional
resistance to freezing due to the thermal exchange produced by the external fins
on its polished chrome brass body.
The MK21's innovative "smart" hose layout comes with a standard cap with four
low pressure ports angled (+/- 20º) to maximize hose routing. This standard cap
can be replaced with an optional cap that offers four low pressure ports at more
extreme angles (0°/30°) plus a fifth centralized high-flow low pressure port --
a useful configuration for technical diving.
The air balanced S560 second stage features a lightweight techno-polymer casing
and comes with full user controls, including an inhalation effort adjustment
knob and a Venturi-Initiated Vacuum Assist (VIVA) dive/pre-dive switch. It can
be counted on to breathe dry and easy, regardless of depth or your position in
the water.
The MK21/S560's size and weight make it an excellent choice for travel divers,
its innovative fin design makes it a good cold-water performer, its "smart" hose
layout is well-suited for some technical applications, and its overall ease of
use, reliability and price make it the must-have reg system for recreational
divers of all skill levels.
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