To achieve extremely high performance in low temperature environments, the second stage of this regulator has been designed with a special thermo-conductive thermoplastic neo-polymer, which has the ability to transfer heat like a metal, while preserving the design flexibility, chemical resistance and physical and mechanical properties of a conventional thermoplastic.

This allows for a dramatic reduction in weight, while still providing heat conductivity on par with metal components. Thanks to this material and a specially designed purge valve, it passes the en 250 cold water tests.

1st stage features:

• Hyper-balanced diaphragm (sealed chamber on mc9sc)
• 2 hp 7/16 unf outputs
• 4 mp 3/8 unf outputs
• Operating pressure: 300 bar (4350 psi) DIN version, 232 bar (3365 psi) international version
• Calibration pressure: 10 bar
• Chemically nickel-plated brass body
• High capacity filter in chemically nickel-plated spherical bronze
• Removable nozzle in AISI 316 steel
• Hyperbalancing system
• Anti-drop air spring
• Stainless steel calibration spring with micropeening treatment
• Piston sliding sleeve replaceable during maintenance
• Body protection in thermoplastic polyurethane
• Air flow rate: 4500 l/min
• Weight of internal version: 650 gr
• Weight din version: 510 gr

2nd stage features:

• More reliable front cover (more impact resistant)
• Downstream system
• Adjustable Venturi effect
• Patented anti-friction lever
• Body in heat-conducting technopolymer
• Large purge button
• Scratch-resistant surface
• Bayonet hood holder with safety lock
• Removable exhalation deflector
• Weight without hose: 140 gr
• Combination performance
• Average inspiratory effort 7.5 mbar
• Average respiratory effort 1 j/l
• Whip covered in super light and flexible technopolymer, weight 153 gr
• Approval en250/2014 for cold water

EN250/2014 Cold Water Approval: The MC9-SEAL CHAMBER 1st stage is watertight and protects against ice formation in cold water and particulate contamination in muddy water conditions.