Regulator
  

You cannot breathe directly out of a scuba tank because of the high pressure. A regulator reduces pressure to safe a level that can be inhaled by the diver. A diving regulator has two parts: the First Stage reduces the tank pressure and connects it to the Second Stage which contains the mouthpiece for breathing

Cressi COMPACT AC2 - Yoke

 

The XS Compact AC2 Regulator is an exceptionally dependable non-balanced flow-by-piston designed 1st stage regulator that is a great choice as a new divers rig, or for use as a stage bottle regulator system.

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The XS Compact AC2 Regulator is an exceptionally dependable non-balanced flow-by-piston designed 1st stage regulator that is a great choice as a new divers rig, or for use as a stage bottle regulator system. This simple yet fail-safe design will deliver air even if there is a first stage failure. The 1'st stage has 1 high pressure (HP) 7/16" threaded port and 4 low pressure (LP) 3/8" threaded ports, and is made from marine grade chromed brass for long life and durability. A conical filter is used which has greater surface area for higher air flow characteristics through the 1'st stage regulator. 

The XS Compact Second-Stage housing is made of durable non-corrosive hi-tech polymers, and has a dependable downstream demand valve mechanism. The flow of air is channeled to the mouthpiece by injection, creating a venturi effect enhancing the performance. The 2'nd stage comes with a flow deviator that acts on the venturi effect, with dive/pre-dive adjustment function. Large soft purge cover allows easy clearing of 2'nd stage and a comfortable silicone mouthpiece for breathing comfort. The XS Compact AC2 Regulator weighs 35 oz. (994 g) with hose and comes with an owner's manual.

1st Stage:
Piston design
1 outlets HP and 4 outlets MP
Brass body Electroless Nickel plated
High capacity conical filter electroless nickel plated
Adjustable without take a part
Stainless steel spring
Flow rate: 2100 l/min
Yoke version weight: 635 gr
Din version weight: 495 gr
2nd Stage:
Downstream system
Adjustable venturi effect
Patented antifriction lever
Big purge button
Anti-scratch surface
Removable exhaust tee without tools
Bayonet-type cap holder with security lock
Weight without hose: 135 gr

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