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REGULATORS

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
OCTOPUS ELLIPSE

Octopus Ellipse uses the same casing as the Ellipse model made from special hi-tech polymers, the only difference being the yellow front cover.

The hose is also yellow and is longer (100 cm against the standard 76 cm).

All the parts of Ellipse, most of which are patented, can be found on this regulator: the fold-out opening of the casing, the special folding diaphragm, the computer designed lever, the tilting movement of the piston, the seal between regulator valve and casing, the possibility of extracting the entire valve system from the body of the 2nd stage.

A flow of pilot air is channelled to the mouthpiece by injection, enhancing the performance. The upper part of the body has a flow deviator that acts on the Venturi effect, with dive/pre-dive function.

The performance is extremely high, although the calibration is regulated so that the inhalation effort is slightly greater than on the Ellipse, to prevent any self-regulating possibility when it is used as a spare regulator.

Octopus Ellipse suits all the Cressi first stages perfectly and all the first stages with an intermediate pressure between 9 and 10 bar.

Ellipse 2nd stage

  • Calibration pressure 9-10 bar
  • Average inhale effort (*) 8 mbar
  • Average exhale effort (*) 11 mbar
  • Average breathing work (*) 1.3 J/l
  • Air supply 1300 l/m Weight (without hose) 166 g

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

OCTOPUS XS 2 The Octopus XS2 uses the same casing as the XS2 model, the only difference being the yellow front cover. The hose is also yellow and is longer (100 cm against the standard 76 cm).
All the mechanics are identical to the XS2 model and consists of a downstream side valve system, with adjustable orifice, simple and extremely reliable. A flow of pilot air is channelled to the mouthpiece by injection, enhancing the performance.

The upper part of the body has a flow deviator that acts on the Venturi effect, with dive/pre-dive function.

Constantly reviewed over the years, this regulator has lots of admirers in the world due to the fact that it is extremely simple and strong, features that make it easy to use and result in low-cost maintenance. In any case, performance levels are high, although the calibration is regulated so that the inhalation effort is slightly greater than on the XS2, to prevent any free-flow possibility when it is used as a spare regulator. The air supply pressure can be adjusted between 9 and 10 bar, perfectly suited to all the Cressi first stages.
XS 2 XS2 is the most inexpensive regulator in the Cressi range.
The body of the 2nd stage is traditionally sized, made from hi-tech polymers and with a lateral valve downstream system with adjustable orifice, simple and extremely reliable.
A flow of pilot air is channelled to the mouthpiece by injection, enhancing the performance. The 2nd stage comes with a a flow deviator that acts on the Venturi effect, with dive/pre-dive function.
Constantly reviewed over the years, this regulator has lots of admirers in the world due to the fact that it is extremely simple and strong, features that make it easy to use and result in low-cost maintenance.
In any case, performance levels are high, and it is suitable for any kind of dive.  
1st stage
XS2 comes with the traditional Cressi AC2 piston model. This is a non-balanced first stage with such high performance that it can be compared to lots of excellent balanced models.The small number of components, the low weight and the excellent materials make it the strongest Cressi first stages, and the most steadfast to maltreatment, a real “working horse” amongst regulators.
An ingenious bush system allows easy and rapid external regulation of the intermediate pressure.It comes in three versions: INT, DIN 200 bar and DIN 300 bar. 

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. 

XS2 2nd stage
  • Average inhale effort (*) 10 mbar
  • Average exhale effort (*) 13 mbar
  • Average breathing work (*) 1.4 J/l
  • Air supply 1050 l/m
  • Weight without hose 200 g
(*)values measured in compliance with UNI EN 250 standards.
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