Cressi First Stage Mc9 Sc

Cressi First Stage Mc9 Sc. The 1st stage MC9 - SC is identical to model MC9, but with a special Seal Chamber which completely isolates the diaphragm and spring from contact with water.

Ideal for diving in waters that are rich in suspension and mineral salts, for archaeological work, for potholing and diving in cold waters.

1st stage MC9-SC

Hyper-balanced Diaphragm 1st stage with highly technological content that places it at the top of the Cressi range.

Very light body covered by a protective elastomer shell.

Cylinder sheathed in an antifriction and anticorrosion material that guarantees perfect sliding of the piston and long maintenance intervals.

The nozzle, made from 316 stainless steel, can be easily replaced, thus ensuring perfect air-tightness, even after many years of use.

Advanced research on the passage of internal air and a special assistance chamber have enabled the drop of pressure upon inhalation to be kept to a minimum, thus guaranteeing high performance in any situation.

Hyper-balancing allows for an increase of the intermediate pressure at maximum depths and lowering of the pressure in the tank, offering higher performance during the delicate ascent phase and at maximum depths.

DIN 200/300 bar fitting in stainless steel which prevents deformation of the thread in the event that the regulator suffers any falls.


MC9 SC diaphragm 1st stage - Technical Features

-Working pressure (INT connection): 0-232 bar
-Working pressure (DIN connection): 0-300 bar
-Calibration pressure: 10 bar
-Calibration adjustment range: +/- 0.5 bar
-Air supply: 4500 l/min (*)
-High pressure seats (HP) 2
-Low pressure seats (LP) 4
-Weight with INT connection: 650 g
-Wight with DIN connection: 510 g


(*)values measured at LP seat outlet with second stage connected and 150 bar pressure in the cylinders.

Scubapro Mk11 First Stage

Scubapro Mk11 First Stage. MK11 FIRST STAGE

A balanced diaphragm first stage regulator, the MK11 is similar to the MK17 but without the dry ambient chamber. The perfect choice for the recreational diver who wants the advantage of a diaphragm fisrt stage for use in temperate waters.

The Diaphragm Technology. Diaphragm-based first stages are environmentally sealed so that water cannot enter the inner mechanism. Bearing in mind that regulators generate temperatures as low as minus 30°C due to the incredibly fast moving air and the pressure drop involved, it is imperative that sensitive moving metal parts avoid contact with extremely cold water or debris. Therefore, diaphragm first stages have been the favored choice of cold-water divers and those working in contaminated or muddy water. SCUBAPRO diaphragm first stages feature balanced technology and are packed with patented features resulting in ultra fast flow to the second stage on demand and a fantastic overall performance.

-The balanced diaphragm technology provides consistent performance at all cylinder pressures, at any depth and optimises the second stage performance, thus allowing for effortless breathing.

-Two opposite high pressure ports- The arrangement of high and low pressure hoses is crucial to diving comfort. Two opposite high pressure ports allow for an individual positioning of the first stage (pointing up or down). This allows the diver to position the gauges either on the right or left side and increases the freedom of movement for head and neck.

-Multiple low pressure ports- For ultimate freedom in the arrangement of low pressure hoses, the MK11 features four stationary low pressure ports, two of them HF. High flow ports deliver about 15% more air than conventional ports.

-DIN/INT first stage configurations- To ensure worldwide compatibility, all SCUBAPRO regulator systems are available in a 200bar INT version as well as 300bar DIN versions.

-Externally adjustable intermediate pressure- Allows authorised SCUBAPRO service technicians to quickly fine tune or make adjustments after maintenance without the need to disassemble the first stage.

Air balanced flow-through piston: No
Classic downstream piston : No
Balanced diaphragm: Yes
Chrome plated brass body: Yes
Full titanium body: No
Anti-freeze protection: No
Dry chamber: No
Low pressure (LP) ports: 4
High pressure (HP) ports: 2
Swivelling turret with LP ports: No
INT 232bar: Yes
DIN 300bar: Yes
Dedicated Nitrox EN144-3 DIN 232bar: No
Externally adjustable intermediate pressure: Yes