The outlet port is located in the lower section of the container.
The pressure switch and filling fitting are screwed and welded.
1 Pressure switch
_ The pressure switch senses a signal when the bottle is discharged or has a leakage. It is calibrated to 275/450 psi (19/31 bars) increasing pressure (filling) and to 225/275 psi (15.6/19 bars) decreasing pressure (discharge or leakage).
The pressure switch is electrically connected to the ENG/APU FIRE panel which generates a discharge signal to the DISCH light (panel 255VU).
Fire Extinguisher Bottle
Figure 004
1EFF : ALL 1 26-21-00 Page 9
1 1 Feb 01/98
1 1
1CES 1
You can manually test the pressure switch fitted on the fire extinguisher bottle.
R 1EFF : 001-049, 101-105, 201-210, 1 26-21-00Page 10 1 1 May 01/05 1 1 1CES 1 2 Filling fitting
_ You can fill the fire extinguisher bottle through the filling
fitting assembly.
3 Frangible disc
_ Firing of the cartridge causes rupture of the frangible disc (calibrated metallic diaphragm) installed on the outlet port. The fire extinguishing agent is then discharged via the discharge head in the fire-extinguishing distribution system.
The frangible disc also functions as an overpressure device in case of excessive pressure in the fire extinguisher bottle,
i.e. between 1710 and 1910 psi. This corresponds to a temperature of 205 deg.F approximately (118 to 131 bars for 96 deg.C approximately).
R **ON A/C 051-099, 106-149, 151-199, 211-299, 301-399, 401-499,
(1) Spherical container/extinguishing agent
(a)
Fire extinguishing agent
-type: Halon 1301 (bromotrifluoromethane, CF3 Br)
-quantity: 11 lb (5 kg)
-pressurized by nitrogen (N2), quantity 0.40 lb maximum
(0.18 kg).
(b)
Spherical container
-material: NITRONIC 40 CRES
-number of outlet ports: 1
-volume: 378 cubic inches (6194 cubic centimeters)
-filling pressure: 600 psi (+0/+25 psi) at 70 deg.F
(41.4 bars (+0/+1.8 bars) at 21 deg.C)
-Operating temperature: -54 deg.C to +96 deg.C (-65 deg.F to +205 deg.F).
On the spherical container there is:
. a pressure switch
. a filling fitting with a stainless steel disc
. an outlet port and frangible disc.
The outlet port is located in the lower section of the container.
The pressure switch and filling fitting are screwed and welded.
1 Pressure switch
_ The pressure switch senses a signal when the bottle is discharged or has a leakage. It is calibrated to 275/450 psi (19/31 bars) increasing pressure (filling) and to 225/275 psi (15.6/19 bars) decreasing pressure (discharge or leakage).
The pressure switch is electrically connected to the ENG/APU FIRE panel which generates a discharge signal to the DISCH light (panel 255VU). You can manually test the pressure switch fitted on the fire extinguisher bottle.
R 1EFF : 051-099, 106-149, 151-199, 211-299, 1 26-21-00Page 12 1301-399, 401-499, 1Aug 01/05 1 1 1CES 1
R 2_ Filling fitting
R
R You can fill the fire extinguisher bottle through the filling
R fitting assembly.
R
R The filling fitting incorporates a stainless steel disc. It
R acts as a primary safety relief device in case of excessive
R pressure in the fire extinguisher bottle, i.e. between 1600
R and 1800 psi. This corresponds to a temperature of 205 deg.F
R approximately (110 to 124 bars for 95 deg.C approximately).
R 3_ Frangible disc
R
R Firing of the cartridge causes rupture of the frangible disc
R (calibrated metallic diaphragm) installed on the outlet port.
R The fire extinguishing agent is then discharged via the
R discharge head in the fire-extinguishing distribution system.
R
R The frangible disc also functions as an overpressure device in
R case of excessive pressure in the fire extinguisher bottle,
R i.e. between 1600 and 1800 psi. This corresponds to a
R temperature of 205 deg.F approximately
R (110 to 124 bars for 95 deg.C approximately).
R **ON A/C ALL
(2) Discharge head
The discharge head can be oriented around its axis (rotatable through
360 deg.). Its position depends on whether it is installed on bottle
1 or 2.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：A320飞机维护手册 AMM FIRE PROTECTION 防火1(109)
