• Standard piston technology

• TIS (Thermal Insulating System)

• 4 Low pressure ports

• Single high pressure port

• Available in yoke or DIN (not shown) configurations

R390 Second Stage

• Classic downstream valve

• Diver adjustable VIVA

• Reversible low pressure hose attachment

• Large, soft purge

• High flow exhaust valve

• Lightweight, compact size

• Ergonomic, safegrip mouthpiece

• Machined marine grade chrome plated brass body

• Over-balanced diaphragm design

• Inverted seat technology and orifice

R380 Second Stage

• Classic downstream valve

• Diver adjustable VIVA

• Reversible low pressure hose attachment

• Large, soft purge

• High flow exhaust valve

• Lightweight, compact size

• Ergonomic, safegrip mouthpiece

• Two High Flow Ports (HFP)

• TIS (Thermal Insulating System)

• Externally adjustable intermediate pressure

• One high pressure port

• Available in yoke or DIN (not shown) configurations

• Machined marine grade chrome plated brass body

• Patented over balanced composite/stainless steel piston

• Thermal Insulating System (TIS)

on piston and spring

• Externally adjustable intermediate pressure

(patent pending)

• New wound conical single stainless steel wire filter

• Enlarged water balancing chamber holes

• 5 High flow low pressure swivel ports

• Dual high pressure ports

• Available in yoke or DIN (not shown) configurations

S550 Second Stage

• Technopolymer body and components

• Air-balanced linear-flow valve

• Diver-adjustable VIVA

• High-flow exhaust valve

• Lightweight, compact size

• Ergonomic, safegrip mouthpiece

• Machined marine grade chrome plated brass body

• Patented over balanced composite/stainless steel piston

• Thermal Insulating System (TIS)

on piston and spring

• Externally adjustable intermediate pressure

(patent pending)

• New wound conical single stainless steel wire filter

• Enlarged water balancing chamber holes

• 5 High flow low pressure swivel ports

• Dual high pressure ports

• Available in yoke or DIN (not shown) configurations

S600 Second Stage

• Technopolymer body and components

• Peak performance air balancing system

• Air-balanced linear-flow valve

• Automatic anti-set feature

• Diver-adjustable VIVA

• High-flow exhaust valve

• Diver-adjustable inhalation effort control

• Lightweight, compact size

• Ergonomic, safegrip mouthpiece