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KMACS-5 With Communications - Overview

KMACS-5 With Communications

Lightweight, portable control box

The Kirby Morgan® Air Control System 5 (KMACS-5) is a lightweight, portable control box for use in surface supplied air diving operations.

The KMACS 5 controls the diver's air supply, communications and monitors the diver's depth. It allows two divers clear push-to-talk (two wire) or round robin (four wire) communications. The KMACS-5 is also available without communications.

The air supply can be from either a low pressure compressor or high-pressure cylinders. The KMACS-5's adjustable first stage regulator reduces the high-pressure air and supplies low pressure through the umbilical to the diver's breathing system. High pressure yokes with DIN adapters permit U.S. standard scuba cylinders or DIN valve cylinders to be used. A low pressure air supply fitting allows for a L.P. compressor to be used as the primary air source.

A complete pneumo system with dual reading gauges (both US Standard and Metric) is provided for each diver, as well as a shut-off/bleed system that uses two high-pressure feed lines which allows changing of used cylinders without interruption of the diving operation. Shut off valves allow the isolation of each diver's air supply. The Communication Set is a multipurpose intercommunication system that provides reliable and clear communications between a topside operator (tender) and one or more surface-supported divers, diving bells, personnel transfer capsules (PTC)s, recompression chambers, or other submersible systems. The lightweight, high impact polyethylene plastic case features double wall construction and extra thick corners that ensure exceptional strength and a long work life. An O-ring seal protects hardware from moisture when the case is closed. All latches are stainless steel for maximum work life.


Part Number
400-046 KMACS-5 w/communication


  • Depth Gauge/Pneumo Systems
    Dual reading gauges are accurate to + 1/4 of 1% of scale, continuously monitoring the diver's depths from 0-250 FSW (0-78 MSW). Maximum recommended user depth: 130 FSW.
    Depth Gauge/Pneumo Systems
  • Depth Monitoring/Pneumo Knob
    Used to meter the flow of air used for depth measurement.
    Depth Monitoring/Pneumo Knob
  • High Pressure (HP) Supply Gauges
    Directly monitors the pressure in each of the air supply cylinders.
    High Pressure (HP) Supply Gauges
  • High Pressure Air Supply Yokes
    High Pressure Air Supply Yokes with DIN fittings. Each yoke has a bleeder valve for rapid cylinder changing. H. P. Supply Max. 3500 P.S.I. (240 Bars )
  • Low pressure Air Supply Fitting
    Allows a low pressure compressor to be used as the primary air source. Low Pressure Supply Max. 225 P.S.I.
    Low pressure Air Supply Fitting
  • Regulator Adjustment Knob
    Controls the air pressure delivered to the diver's umbilical. Variable pressure settings from 115 P.S.I. to 225 P.S.I. are obtainable.
    Regulator Adjustment Knob
  • Selector Valve Handle
    Used to choose either one of the air supply cylinders. Individual cylinders may be changed out with no interruption of the dive.
    Selector Valve Handle
  • Shut Off Valve
    Controls the air supply to both divers. When the valve handle is up (vertical) the valve is open. When the valve handle is down (horizontal) the valve is closed.
    Shut Off Valve
  • The Stainless Steel Air Outlets Fittings
    Connect the diver's air supply hose and depth monitoring/pneumo hose to the KMACS, providing a strong, reliable, corrosion resistant connection. Shut-off valves allow the isolation of one diver's air supply from the other.
    The Stainless Steel Air Outlets Fittings
  • Umbilical Pressure Gauge
    Provides a constant reading of the pressure in the diver's umbilical. The scale on the gauge is 0-300 P.S.I. (0-20 Bar). Recommended umbilical pressure range 150-225 P.S.I.
    Umbilical Pressure Gauge