-a valve flow section,
-two position indicator switches and a visual position indicator,
-
a pneumatic actuator and an actuator cover,
-
a solenoid valve assembly.
(1) For detailed description refer to 49-51-00.
B. APU Bleed Check Valve 7260HM
(1) The APU bleed check valve is a 101.6 mm (4.0 in.) dia. flapper-type air valve. The main components of the valve are:
-
the valve housing
-
the valve flaps
-
the shaft
-
the spring (low force). The low-forced spring holds the valve flaps in the closed position. The valve flaps open when the differential pressure is at approximately 0.0025 bar (0.0362 psi).
APU Bleed Control Valve
Figure 008A
R 1EFF : 106-149, 211-299, 301-399, 401-499, 1 36-12-00Page 29 1 1 Aug 01/05 1 1 1CES 1
APU Bleed Load Valve - Schematic and Logic
Figure 009
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 36-12-00Page 30 1201-210, 1Aug 01/05 1 1 1CES 1
APU Bleed Control Valve - Schematic and Logic
Figure 009A
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APU Bleed Check Valve Figure 010
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R **ON A/C 106-149, 211-299, 301-399, 401-499,
A. APU Bleed Control Valve (Ref. Fig. 008A) The APU bleed control valve consists of a spherical body with three flanged connections. It has a valve section with a butterfly flap, an actuator and a servovalve. The butterfly flap is driven by the fixed link linear rotary actuator. The rotary actuator is controlled by the servovalve which is operated by fuel pressure from the fuel control unit. The ECB sends control current signals to the two solenoids of the servo valve. This allows the fuel pressure to move the actuator and position the butterfly flap in the demanded position. A Linear Voltage Differential Transducer (LVDT) transmits position signals to the ECB. The LVDT is located inside the piston of the actuator.
(1) For detailed description refer to 49-51-00.
B. APU Bleed Check Valve 7260HM
(1) The APU bleed check valve is a 101.6 mm (4.0 in.) dia. flapper-type air valve. The main components of the valve are:
-
the valve housing
-
the valve flaps
-
the shaft
-
the spring (low force). The low-forced spring holds the valve flaps in the closed position. The valve flaps open when the differential pressure is at approximately 0.0025 bar (0.0362 psi).
**ON A/C ALL
C. Crossbleed Valve 6HV
(Ref. Fig. 011)
R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
(Ref. Fig. 012)
**ON A/C 301-399,
(Ref. Fig. 012A)
Crossbleed Valve Figure 011
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Crossbleed Valve - Schematic and Logic
Figure 012
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Crossbleed Valve - Schematic and Logic
Figure 012A
R 1EFF : 301-399, 1 36-12-00 Page 36
1 1 Aug 01/05
1 1
1CES 1
**ON A/C ALL
(1) The crossbleed valve is a butterfly-type valve with a diameter of
114.3 mm (4.5 in.).
The main components of the valve are:
-
the valve body
-
the butterfly plate
-
the double motor actuator
-
the manual override lever. The double motor actuator has two electrical motors which are designated as the motor 1 and motor 2. These two motors work independently. The motors open and close the valve, of which one motor controls the automatic and the other the manual operation. A brake system in each motor locks the butterfly plate in position when the electrical power supply stops. When the valve is in its fully open or closed position, limit switches in the actuator automatically stop the electrical power supply to the motors. The valve also has a manual override lever which permits the operation of the butterfly plate without electrical power.
7. Operation / Control and Indication
__________________________________
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-210,
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