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REGULATORS

ELLIPSE ALASKA MC8 This model has been designed mainly for use in cold water
The MC8 diaphragm first stage comes with the standard issue antifreeze kit and the second stage is identical to the one used in the Ellipse Titanium. 
The first stage of the Ellipse Alaska is the already famous and excellent Cressi MC8 model balanced diaphragm. It comes with the antifreeze kit, which provides an additional waterproof chamber, to screw onto the end of the first stage. This chamber ends with a silicon diaphragm on the outside that seals off the inside from contact with water, while still transmitting any pressure variation to the inner organs, thanks to the flexibility of the material. 
The antifreeze kit is composed of two main parts, both made from strong chrome-plated brass. There is a mushroom element inside, made from acetylic resin, which connects the external diaphragm to the internal one.
 The use of the antifreeze kit completely eliminates any water seepage into the external part of the first stage, so not only does it prevent the formation of ice in this area, but it also prevents the formation of deposits and incrustations on the diaphragm and on the spring. 
This provides considerable advantages for divers working in mineral-rich water or with lots of suspension (archaeological sites, port works, caving etc.)
ELLIPSE BLACK AC2 The Ellipse regulator has all the features of the new generation regulators, so it is small in size, has very moderate weight, and a modern and charming look. The performance provided is excellent and satisfies all divers, from beginners to professionals, even with its small size and traditional piston first stage. 
The first stage of Ellipse is the tried and tested traditional AC2 piston Cressi model. Although this is a non-balanced first stage, it has an exceptional air flow, a lot higher than what is found on the market for this kind of first stage and that easily stands up to comparison with the balanced models in terms of performance. It comes with both international yoke or 200 or 300 bar DIN connection and boasts the exclusive feature of enabling easy and quick adjustment of the intermediate pressure.
It has a generously sized cone-shaped sintered filter. 
This compact first stage and its legendary robustness and simplicity make it one of the most esteemed and commonly used models on the market.
The second stage of the Ellipse is made from a special new generation high-tech polymer, which stands out due to its flexibility, mechanical strength and a capacity to absorb shocks and reduce noise that are truly original in this sector.
The casing of the Ellipse has a patented “fold-out” opening. With a simple 4 mm Allen wrench you can undo the cam-lock bayonet closure system to open up the casing. This operation is carried out rarely, but every now and then it is necessary so as to clean and inspect the inside and to make sure that the diaphragm and exhaust valve are intact.
The diaphragm has an elliptical shape, the structure of which is patented and it is possible to use a lever of the same size or even bigger than the ones on considerably larger regulators.
When you open the casing you access the regulator system which is a classic downstream side valve. The lever has an unusual, computer-designed and patented conformation that virtually annuls the friction against the diaphragm cap, thanks to its special structure and also thanks to a completely new feature of the poppet, also patented. In fact, instead of simply sliding longitudinally, like all poppets, this one also tilts vertically, minimising friction against the orifice. The rectangular opening of this orifice is protected internally by a revolutionary seal made from elastomer (patented), which directs all the air towards the injector instead of allowing it to enter the casing from the opening of the orifice. This drastically reduces the risk of the 2nd stage freezing in icy-cold water, and the air is completely directed towards the mouthpiece, which exalts the performance of the regulator.
Another exceptional patented feature of the Ellipse, is the possibility of extracting the entire regulator system from the casing, just by loosening a counter-screw and removing two small metal retaining cylinders. So all maintenance and calibration can be “open heart”, keeping times to a minimum and making these operations easier.
The new structure of the exhalation valve, has made it possible to reduce breathing effort even more than the already excellent values of the Airtech. The valve works in a special trap, which protects it from a sudden flow of water that can be channelled through the exhaust tee in particular situations (jump from a boat into the water, currents, sudden movements of the head, etc…).
A lever that acts as a flow deflector, situated in the upper part of the casing makes it possible to adjust the Venturi effect. When it is moved to (-) position it acts as pre-dive, for water to enter and for the initial phases of the dive, and when it is moved to (+) the regulator can then develop maximum performance.
A system of antagonistic counter-flows inside the casing balances depression created by the powerful Venturi effect, perfectly calibrating air flow to the diver’s requirements.

Performance 
The use of a lever with an unusual structure and the almost total reduction of friction have made it possible to obtain very high performance. The inhalation effort is particularly low, averaging about 5.5 Mbar, with an initial effort of almost nil. The overall breathing work is less than 1.1 joule/litre, a very good value for a regulator of this catehory. Anyone who tries the regulator in water will be amazed at the extremely easy and gentle air flow provided, and apart from the excellent values provided at the test bench, it highlights a peculiar characteristic of this regulator: how extremely pleasant it makes breathing and its incredible silence.

Technical features
AC2 piston 1st stage
Working pressure (INT connection) 0-232 bar
Working pressure (DIN connection) 0-300 bar
Calibration pressure 9.5-10 bar
Calibration adjustment range +/- 0.5 bar
Air supply 2100 l/min (*)
High pressure seats (HP) 1
Low pressure seats (LP) 4

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

Ellipse 2nd stage
Average inhale effort (*) 5.5 mbar
Average exhale effort (*) 11 mbar
Average breathing work (*) 1.1 J/l
Air supply 1450 l/m
Weight without hose 166 g

(*)values measured in compliance with UNI EN 250 standards.
ELLIPSE BLACK MC5

New regulator made up of the lightweight second stage Ellipse with an ultra durable, high impact thermo polymer cover (Black version) combined with the brand new, never before seen MC5 balanced diaphragm first stage.
Extremely lightweight, excellent performance, very easy maintenance and moderate purchase price are its strengths.

The new MC5 first stage was designed completely in the Cressi Engineering and Development Centre.It is a balanced diaphragm first stage of an extremely moderate size and weight, which encompasses a high concentration of technology.
A brand new sliding cylinder of the poppet, made from a special self-lubricating technopolymer minimises internal attrition and completely eliminates any possible oxidisation that could alter the performance of the regulator over time.
The excellent performance has been improved even further by a special assistance chamber that triggers off a strong Venturi effect between the central diffuser and the intermediate pressure outlets.
The hyper-balanced diaphragm mechanism not only maintains regulator performance when the pressure in the tanks changes and when diving deeper, but even improves performance in the notoriously most critical final phase of the dive.
A sintered filter with a larger surface area withholds impurities present in the incoming air.
The low and high pressure outlets are pre-oriented for optimum placement of the hoses.
The very small cylindrical body is completely covered by an elastomer protective shell.
It is quick and easy to pull apart the regulator for maintenance with the new INT yoke connection system or the internally threaded DIN connector.

Technical specifications

  • Hyper-balanced diaphragm first stage
  • Three pre-oriented low pressure outlets
  • One high pressure outlet
  • Sintered filter with larger surface area
  • First stage completely protected by an elastomer shell
  • Available with INT yoke or with DIN 200/300 bar connection
  • Weight MC5 with INT yoke: 550 g
  • Weight MCR with DIN connection 300 bars: 450 g
ELLIPSE STEEL AC10 Ellipse Steel 2nd stage + Balanced Piston 1st stage
The first stage Ellipse Steel maintains the exellent technical features of the Ellipse Titanium, the difference lying in a new, steel cap on the second stage.
The AC10 1st stage is the latest version of the Cressi balanced piston model, manufactured for many years and highly appreciated for its exceptionally durable and reliable characteristics. The 1st stage is the renowned Cressi AC10 balanced piston model.
It can be supplied with international yoke or with 200 or 300 bar DIN connections.
This balanced piston first stage means performance remains constant, irrespective of depth and pressure from the tanks.
With the continuous reviews and improvements over the years all the air passages inside the first stage have been completely redesigned and considerably increased so as to give the excellent performance that AC10 offers today.
Alongside this excellent performance, the AC10 boasts simple mechanics, resistance to wear and tear and requires so little upkeep that it has become a product with legendary reliability.
It has some 5 low-pressure ports located right around a swivel head, which guarantees rational hose positioning on any valve.
We must also point out the quick and really handy external system to regulate intermediate pressure, which can be calibrated in a few seconds with a normal Allen key and the extremely powerful sintered filter system to filter air from the tanks. 

Technical features AC10 balanced piston 1st stage

  • Supply pressure (INT connection) 0-232 bar
  • Supply pressure (DIN connection) 0-200 or 0-300 bar
  • Calibration pressure 9.5-10 bar
  • Calibration adjustment range +/- 0.5 bar
  • Air supply 2800 l/min (*)
  • High pressure ports (HP) 2
  • Low pressure ports (LP) 5

(*)values measured at LP port with second stage connected and 150 bar pressure in the tanks.

ELLIPSE STEEL MC5 New regulator made up of the excellent Ellipse second stage with steel cap (Steel version) combined with the brand new, never before seen MC5 diaphragm first stage.
Extremely lightweight, excellent performance, very easy maintenance and moderate purchase price are its strengths.
The new MC5 first stage was designed completely in the Cressi Engineering and Development Centre.
It is a balanced diaphragm first stage of an extremely moderate size and weight, which encompasses a high concentration of technology.
A brand new sliding cylinder of the poppet, made from a special self-lubricating technopolymer minimises internal attrition and completely eliminates any possible oxidisation that could alter the performance of the regulator over time.
The excellent performance has been improved even further by a special assistance chamber that triggers off a strong Venturi effect between the central diffuser and the intermediate pressure outlets.
The hyper-balanced diaphragm mechanism not only maintains regulator performance when the pressure in the tanks changes and when diving deeper, but even improves performance in the notoriously most critical final phase of the dive.
A sintered filter with a larger surface area withholds impurities present in the incoming air.
The low and high pressure outlets are pre-oriented for optimum placement of the hoses.
The very small cylindrical body is completely covered by an elastomer protective shell.
It is quick and easy to pull apart the regulator for maintenance with the new INT yoke connection system or the internally threaded DIN connector.

Technical specifications
  • Hyper-balanced diaphragm first stage
  • Three pre-oriented low pressure outlets
  • One high pressure outlet
  • Sintered filter with larger surface area
  • First stage completely protected by an elastomer shell
  • Available with INT yoke or with DIN 200/300 bar connection
  • Weight MC5 with INT yoke: 550 g
  • Weight MCR with DIN connection 300 bars: 450 g
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