Cressi AC2/XS2 Piston Combination Regulator

Comfortable underwater breathing

Breathe comfortably underwater! The Cressi AC2/XS2 Piston Combination Regulator combines the second stage XS2 regulator with the first stage hyper-balanced AC2. This value-packed regulator has lots of admirers around 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.

1st stage AC2
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.

2nd stage XS2
The body of the 2nd stage is traditionally-sized with a straightforward design. It's made from hi-tech polymers and with a lateral valve downstream system with adjustable orifice. 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. In any case, performance levels are high, and it is suitable for any kind of dive.

Adjustable Venturi effect
The Cressi Compact regulator is designed to produce a controlled Venturi effect that creates a vacuum against the diaphragm. This allows you to open the valve to obtain air and helps you breathe more comfortable underwater.

Cressi AC2/XS2 Piston Combination Regulator Features:
General

• Self-lubricating jacketed cylinder
  
• Jacketed hose weight: 153 g
  
• Certification: EN250/2000 for cold water

Cressi AC2 1st Stage Regulator

• Diaphragm: hyper-balanced
  
• Anti-pressure drop pneumatic spring
  
• LP/HP pressure outlet: 4 x MP 3/8 UNF and 1 x HP 7/16 UNF
  
• Service pressure: 300 bar (4350 psi) DIN version, 232 bar (3365 psi) Yoke version
  
• Calibration pressure: 9,5-10 Bar
  
• Brass body Electroless Nickel plated
  
• High capacity conical filter electroless nickel plated
  
• Aisi 316 long lasting piston
  
• Adjustable without take a part
  
• Stainless steel spring
  
• Flow rate: 2100 l/min
  
• Yoke version weight: 635 gr
  
• Din version weight: 495 gr
  

Cressi XS2 2nd Stage Regulator

• Adjustment of Venturi effect
  
• Average breathing effort: 1,5 J/L
  
• Downstream system
  
• Easy maintenance
  
• Weight without hose: 206 gr
  
• Average inhale effort (*): 10 mbar
  
• Average exhale effort (*): 13 mbar
  
• Average breathing work (*): 1.4 J/l
  
• Air supply: 1050 l/m
  
• (*)values measured in compliance with UNI EN 250 standards

AC2 piston 1st stage Specifications

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

Cressi Regulators Comparison Chart

Cressi AC2/XS2 Piston Combination Regulator Technical Specifications