RC MK2 4603

RC respirators are ideal for the protection of the operators involved in long duration works in chemical plants, polluted areas and, generally, in all cases where there is, or may be, oxygen deficiency and long autonomy is needed. The compressed air line supply unit model RC 4603 is one of the main components of the breathing apparatus with demand valve. RC respirators are made of a mobile supply unit mounted on a trolley
able to feed, depending on the additional equipment required, up to two operators at the same time at a max distance of 50 metres from the cylinder. For every operator a medium pressure supply hose, a carrying belt, a demand valve and a mask are required. The demand valve, the mask and the general working principle of the reducer on the supply unit are exactly the same used for Spasciani breathing apparatus type RN and BVF and they bring back to the general description of the mk2 system. RC 4603 supply unit is mounted on a two tyres trolley provided with a reel for the tube. The trolley is also provided with the RB pressure
reducer, which maintains the outlet medium pressure constant independently from the pressure in the cylinder, two pressure gauges that continuously read the high and medium pressure, the alarm whistle which activates simultaneously with the alarm on the demand valve and a quick coupling for the connection of a tube for a second operator. The trolley is provided with two high pressure tube to connect two 300 bar cylinders (to be ordered separately) equipped with EN 144 valve. The high pressure tubes are provided with release
valves to replace cylinders when in use. The connection of the feeding system to the demand valve is made by 8×17 medium pressure hoses available in different lengths and provided with quick safety couplings to be ordered separately. Two hoses can be connected to the trolley, one by the reel and the other by the second coupling on the reducer. The medium pressure hose shall be carried along by the user carried by the special carrying belt provided with snap hook. The demand valve used in the RC respirators shall be type A or BN. The two types only differ for the connection to the mask. Demand valve A type is provided with standard screw connector to EN 148-3 (M45x3) while type BN is provided with snap in connector to DIN 58600. Type A demand valve may be used with TR 82 A or TR 2002 A masks while type BN only with TR 2002 BN. In both models the positive pressure is automatically activated by the first breath in and maintained in the face piece thus impeding any possible inlet of contaminated air from outside. In case of need the positive pressure may be manually activated by a front button on the demand valve that also permit to have an extra flow. The demand valve is connected to the medium pressure hose by means of a male quick coupling. The masks that can be used on RC respirators are TR 82 A, TR 2002 A or TR 2002 BN (see specific data sheet for the technical features). They must be compatible with the demand valve used. The respirator takes advantage from the unique MK2 System warning built into the demand valve. This is activated when the pressure left in the cylinder drops below 35 bar. The signal originates from a sounding vibration by every inhalation. In this way the full capacity of cylinder is made available to the user for breathing. The acoustic warning is related to the respiratory frequency of the user and allows the user to distinguish his own signal from that emitted by nearby fellows or noise (Self Test Function). The location of the warning device protects it from frost or dirt. RC respirators may be used in conjunction with back up self contained breathing apparatus BVF BU, connected through a four-way valve and worn by the user. The breathing apparatus activates when for every reason the feeding from the air line system is interrupted and enable to get out from the dangerous area.

  • RB pressure reducer: piston with compensator
  • Demand valve: with integral alarm device and supplementary supply button
  • Setting of the alarm at the demand valve and at the trolley: 55 ± 5 bar
  • Volume/pressure of Cylinder: 6 l/ 300 bar
  • Number of cylinders: 2
  • Feeding hoses: diameter 8×17, available in different sizes (max 50 meters)
  • Air reserve: 3300 N litres
  • Duration: 110 min with an average consumption of 30 l/min and with one operator
  • Carrying belt: Self-extinguishing webbing and metal snap hook
  • Reducer: Nickel plated aluminium
  • Alarm and feeding block: Nickel plated aluminium/li>
  • Automatic Demand Valve: Glass fibber reinforced nylon housing
  • Feeding hoses: Non-toxic SBR provided with special clamped quick connectors
  • Cylinder: Steel
  • Store at temperatures between -20 and +50 °C and with RH <80%
  • Weight: 50 Kg approx. with fully charged cylinders (without masks and hoses)
  • Dimensions: 530 x 500 x 116 mm
  • EN 14593-1:2005


Wheeled breathing apparatus duration from 90 minutes to 10 hours