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2. DETAILED DESCRIPTION
The breathing apparatuses SPASCIANI RN series consist of the following elements:
Carrying system
Air pressure cylinder/s
Pressure reducer
High pressure gauge with connection hose
Demand valve with audible warning device
Full face mask
and any
Accessories
Reference figures:
Fig.1 for RN T1 and RN FR T2
Fig.2 for RN, RN FR
Fig.3 for RN BIBO, RN FR BIBO
Fig.4 for the pressure reducer
Fig.5 for the demand valve
Fig.6 for the full-face mask
2.1. Carrying system (pos. A in fig. 1,2,3)
The carrying system has a back-plate of anatomical shape (a1), made of self-extinguishing material for Type 1 and reinforced and
highly flame-resistant for Type 2 equipment, with two integral handles allow to carry the complete apparatus, with adjustable
shoulder straps with padding (a2) and waist belt (a3), to make sure the device can be comfortably adapted to any individual. A
special adjustable band allows fitting air cylinders of different diameters and lock them in place thanks to the snap buckle.
Models RN T1 are equipped with shoulder straps without padding. Models RN are provided with padded shoulder straps and upon
request a kidney belt (a5). Models RN BIBO and RN FR BIBO are equipped with padded shoulder straps and a kidney belt; the
frame is equipped with a special fastening system (a6) that allows housing and fastening the two cylinders. Model RN FR are
provided with padded shoulder straps and upon request a kidney belt; model RN FR T2 is equipped with shoulder straps without
padding; the fabrics used in all FR SCBAs for belts, shoulder straps and kidney belt are in aramid or para-aramid fibres, to be highly
resistant to flames. On the left shoulder strap a band with a Velcro closure (a4) keeps in place the pressure gauge and the demand
valve hoses. In the lower part of the back-plate is fixed the pressure reducer.
2.2. Cylinder with valve (pos. B fig. 1,2,3)
The RN series SCBA are equipped with one or two steel or composite cylinders whose technical features are summarized in the
following table:
Tab.1 – Technical features of the cylinders
Capacity
(l)
6 (steel)
6,8 (composite T4 type)
9 (composite T4 type)
*calculated as cylinder pressure considering the compressibility factor which leads to a volume reduction of approximately 8% at
300 bar at standard temperature
**autonomy achieved for an average consumption of about 30 l/min. per operator.
The cylinders are equipped with hand wheel valves (b1) with threads connection according to the EN 144-1 standard as far as the
connection between the valve and cylinder is concerned (cylinder neck thread M18x1.5) and to the EN 144-2 (5/8'' gas thread) as
far as the connection between the valve and pressure reducer is concerned.
Note RN BIBO and RN FR BIBO: these models are equipped with 300 bar connectors in accordance to EN 144-2 for the connection
to the pressure reducer and to the two cylinders. It is also provided of a check valve to avoid that one of the two cylinders be
loaded by the other. Warning: during the use of the set both cylinder valves shall be kept open. The cylinders and valves are in
accordance with the PED 2014/68/UE and/or TPED 2010/35 EU Directives and with the national regulations of the countries in
which they are marketed. They are also provided with all the relevant documents (declarations of conformity, test certificates,
instructions for use). The identification data is printed on the cylinders and valves as required by the applicable laws or on a special
permanent label applied to the cylinder (composite cylinders). The cylinders are painted according to the EN 1083-3 standard.
Breathable air is provided by the cylinders and must always be in accordance with the EN 12021 standard.
The valves of the cylinders can be provided with the "Excess Flow Valve" accessory upon request (see par. 2.7.4).
2.3. Pressure reducer (pos. C fig. 1,2,3 and fig. 4a, 4b)
The pressure reducer has a chromed brass body and is installed directly onto the cylinder. It consists of devices that reduce and
maintain the pressure between 4.7 and 5.5 bar depending on the pressure inside the cylinder. When the cylinder pressure reaches
(55 ± 5) bar, a special device increases the output pressure between 7,5 and 8 bar, thus turning the alarm signal in the demand
valve on. The reducer consists of the following elements:
- EN 144-2 connection for the cylinder (pos. 1 in fig. 4a, 4b); the swivel is rubber-coated except for RN T1 and RN FR T2, where it
is only in metal
- High pressure connection (pos. 2 fig. 4a, 4b)
- High pressure hose with gauge (pos. 3 in fig. 4a)
- Medium pressure hose, in a single piece for RN T1 and RN FR T2 and with quick safety connection Eurocouplings type for all
other models, to feed the demand valve safety. The medium pressure hose is connected to the reducer via a medium pressure
connection (pos. 6 in fig. 4b). The medium pressure hoses in the FR models are made of highly heat- and flame-resistant material.
- Auxiliary connection with cap (pos. 5 fig. 4b). On the auxiliary outlet can be mounted, by removing the cap, the accessories
"additional alarm" (see par. 2.7.2) and " escape hood for second operator (see par. 2.7.3).
- Safety valve (pos. 7 fig. 4b).
- Joint that allows to fix the reducer to the back-plate (pos. 8 fig. 4b).
2.4. Pressure gauge (pos. D fig. 1,2,3 and fig.4a)
Pressure gauge with zero stop feature and within the precision limits of class 1.6. It is equipped with a nickel-plated casing and
Pressure
Diameter
(bar)
(mm)
300
140
300
155
300
173
Length (mm)
Weight empty
(kg)
520
7.5
525
4.2
556
4.8
Reserve*
Autonomy**
(l)
(min.)
1670
55
1870
62
2480
82
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