Specification :
DEMAND VALVE WITH AUTOMATIC INSERTION OF THE POSITIVE PRESSURE
MK2 B.A. are equipped with a demand valve that automatically turns the positive pressure on at the rst breathing in. A rubber button in front of the demand valve allows, if necessary, to manually activate positive pressure or to inject extra air into the mask.
A positive pressure ( 3 mBar) is kept within the mask cavity in any moment of the breathing cycle. This avoids the inward leakage of polluted air and isolates the user from the surrounding atmosphere.
PANORAMIC FULL FACEMASK
The mask is the TR82 a panoramic full facepiece, tted with pre-loaded exhale valves, in order to maintain a positive pressure within the mask cavity. All masks are CE certified according to EN136: 98 as class 3.
Two Available models available:
• TR82 / A or TR2002 A Mask. Connected to the demand valve by means of a standard M45x3 connector ( EN148-3) .
• TR2002 B/ N Mask. Connected to the demand valve by means of a special quick connector to DIN 58600. This mask can also be used in conjunction with gas canisters or negative pressure breathing apparatus, being also tted with a standard EN 148/ 1 connector. A unique patented system automatically adapts the inside pressurevalve load to the type of apparatus connected to the mask.
TR 2002 A and TR 2002 B/ N full facemasks are available in two versions, with faceblank moulded in EPDM rubber or in silicone. The masks moulded in silicone are named TR 2002 S A e TR 2002 S B/ N
UNIQUE PATENTED WARNING DEVICE AT THE MASK
When the remaining pressure in the cylinder drops to below 60 Bar ( 35 Bar for model RC) , a special device inside the demand valve actuates the acoustic warning. A loud vibration is made with every inhalation and terminates only when the air reserve is completely used up.
The advantages of such a system are:
• No reduction in durationno air loss due to the warning whistle: Longer Duration
• Closeness to the ear and repeated warning: better Best audibility
• Warning device protected from frost and dirt deposition: Function granted under all circumstances
• Warning device working with extension hose even at a long distance from cylinders, with extension : Granted Audiblility to the user
COMPENSATED PRESSURE REDUCER
The MK2 reducer is a piston device with automatic compensator. This means that the outlet pressure is steady throughout the duration, no matter what the cylinder pressure. The reducer is designed for use with 300 Bar cylinders.and fitted with EN 144 hihgh pressure connectors.
SAFETY QUICK CONNECTORS
The demand valve is connected to the pressure reducer by means of special quick connectors that can only be separated with both hands. Quick connectors are of a special design to avoid inadvertent connection to other brands’ systems.
PHOSPHORESCENT GAUGE
The pressure in the cylinder can be checked at any time by means of the special gauge scaled up to 450 Bar and with contrasted warning zone from 60 to 0 Bar.
SIMPLIFIED MAINTENANCE
The directions for user information booklet that comes with every B.A., gives a schedule for the correct maintenance of the set. SPASCIANI offers a wide network of authorised workshops to ensure a rapid and reliable service.
FOUR WAY VALVE
Supplied on request, A special four way manifold, interposed between the demand valve and the pressure reducer, allows feeding a second man or connecting the b.a. to an air line.
The air feeding is automatically switched from cylinder to airline ( or vice versa) when connecting ( or disconnecting) . The Four way valve is supplied on request.
A very interesting application is the use with RC and BVF.
In this case the use of BVF ensures that even in case of failure of the main air supply the user can count on a further autonomy of some twenty minutes to escape from the polluted area.
Self contained breathing apparatus duration from 30 to 180 minutes, depending on the model and on the cylinder mounted.
Available with:
• One steel cylinder: 6 or 3 litres 300 bar
• One composite cylinder 9 or 6.8 litres 300 bar
• Two composite cylinders 9 or 6.8 litres 300 bar
RN can be supplied with mask and demand valve type A ( standard connector EN 148-3) or with mask and demand valve type B/ N ( snap-in connector according to DIN 58600) .
This breathing apparatus is ideal for maintenance intervention in chemical plants, fire fighting, working in very polluted environments or in oxygen deficiency.
According to EN 137.
