DISTRIBUTOR VALVE,INDIAN RAILWAYS.

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DISTRIBUTOR VALVE INDIAN RAILWAYS Created by
A.srinivas,junior engineer, Wagon
workshop, rayanapadu,vijayawada. Open in PPTX
only
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HEART OF THE AIRBRAKE
DISTRIBUTOR VALVE
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DISTRIBUTOR VALVE

• Distributor valve is the most important
  functional component of the air brake system and
  is also sometimes referred to as the heart of the
  air brake system.
• The function of the distributor valve is to
  distribute compressed air received from brake
  pipe to auxiliary reservoir and control
  reservoir. In addition to this it also senses
  drop and rise in brake pipe pressure for brake
  application and release respectively.

• It is connected to brake pipe through
  branch pipe. Various other components connected
  to the distributor valve are auxiliary
  reservoir, brake cylinders and control reservoir.
• The distributor valve is removed for
  overhaul, maintenance replace without
  disturbing the pipe connections.
• The complete working of braking system
  depends upon the working of distributor valve.

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DISTRIBUTOR VALVE

• Two designs of distributor valves are
  in use on wagons. These are
• 1) KE Type distributor valve.
• 2) C3W Type distributor valve.
• The KE type distributor valve consists of
  the following
• main subassemblies-
• Three pressure valve 5.
  Minimum pressure limiter
• U Controller
  6. Maximum pressure limiter
• R charger
  7. A controller
• Choke cover
  8. Quick release valve

5
KE DV / R-CHARGER
FUNCTIONS
ASSEMBLING

• The function of R- charger are
• To charge the auxiliary reservoir from BP to 5
  kg/cm2 in single pipe system during charging.
• It prevents back flow of air from AR to BP during
  brake application.
• To isolate the DV in case of malfunctioning.
• To release the air from AR BC manually.

R-CHARGER

• In dv assembling
• 48 no.s must change items,
• 64 no.s spare parts,
• 20 no.s bolts nuts,
• total near about 140 items
• are used.
• around 60 Tools are used in
• assembling.

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KE DV / A-CONTROLLER
FUNCTIONS
ASSEMBLING

• The functions of A-controller are
• It charges control reservoir to
• 5 kg/cm2 from BP during charging.
• It isolates the CR from BP, when the brake pipe
  pressure is reduced at the faster rate, during
  sensitivity range.
• It connects CR with BP,when the brake pipe
  pressure is reduced at the slower rate, during
  insensitivity range.
• As soon as BC gets a pressure of
• 0.2 kg/cm2 A-controller closes the passage
  b/w CR BP during brake application.

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KE DV / U-CONTROLLER
FUNCTIONS
ASSEMBLING

• The function of U-controller is
• to reduce the brake pipe pressure further by
  0.4 kg/cm2, in addition to brake pipe pressure
  reduced by the driver from the loco, to
  accelerate the brake application.
• As soon as BC gets a pressure of 0.4
  kg/cm2,The U-controller closes the passage B/w
  BP exhaust, which in turn prevents any further
  drop in BP pressure.

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KE DV / 3 PRESSURE VALVE
FUNCTIONS
ASSEMBLING

• It connects AR with BC during brake application.
• It connects BC with Exhaust during brake release.
• It admits BC pressure in steps, when the brake
  pipe pressure is reduced in steps, to facilitate
  graduated application.
• It releases air from BC in steps, when the brake
  pipe is pressure is increased in steps, to
  facilitate graduated release.

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KE DV / MIN.PR.LIMITER
FUNCTIONS
ASSEMBLING

• The function of MIN.pressure limiter is to admit
  a pressure of 0.8kg/cm2
• immediately into the BC during brake
  application to overcome the resistance offered by
  the brake rigging.
• It is a non restricted passage between AR BC.
• Initially during brake application the air from
  AR is sent into BC through two passeges.one with
  restrictions and another without restrictions. as
  soon as BC gets a pressure of 0.8 kg/cm2 the
  min.limiter closes the non-restricted passage and
  further admission of air from AR is sent into BC
  through restricted passage.

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KE DV / MAX.PR.LIMITER
FUNCTIONS
ASSEMBLING

• The function of MAX.pressure limiter is to admit
  a max.pressure of 3.8 kg/cm2 even emergency
  application.
• It is a restricted passage between AR BC.
• When the BC gets a pressure of 3.8 kg/cm2 max.
  limiter closes the restricted passage. and this
  passage is closed, the AR completely disconnected
  from BC.and further admission of air from AR in
  to BC is stopped.

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KE DV / QUICK RELEASE VALVE
FUNCTIONS
ASSEMBLING

• The function of quick release valve is to release
  the air from CR manually to facilitate manual
• release.
• NOTE- In case of C3W DV,
• it is a double release valve and it is to
  release the air from CR as well as from AR
  manually.
• When the release valve is pulled only onceshort
  pull the air from CR is released completely.
• On continuous release, AR can also be released.

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KE DV / CHOKE COVER
FUNCTIONS
ASSEMBLING

• The choke cover has application release chokes
  inside it. The application and release chokes
  help in regulating the application and release
  times of brake.
• The following are the different hole sizes used
  in our workshop.
• BOXN,BCN,BTPN,BOBYN,BCNHL etc.
• application/release choke hole size - 1.7/1.7
  mm
• Any BMBS wagons
• application/release choke hole size -
  1.42/1.52 mm
• 3. BOBR , BLC, BCCW, BTAP etc.wagons (PT
  DV)
• application/release choke hole size -
  0.44/0.42 mm

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3-PR.VALVE
0 kg/cm2
BC
U-CTLR
MAX.LR
MIN.LR
A-CTLR
AR
AR
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
5 kg/cm2
EXH
R-CHARGER
5 kg/cm2

CR
CR
QRV
BP PRESSURE
5 kg/cm2
CR PRESSURE
OFF
AR PRESSURE
ON
CHARGING
BC PRESSURE
Created by srinivas
NO PRESSURE
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3-PR.VALVE
0 kg/cm2
BC
U-CTLR
A-CTLR
MAX.LR
MIN.LR
AR
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
5 kg/cm2
EXH
R-CHARGER
5 kg/cm2

CR
QRV
BP PRESSURE
5 kg/cm2
CR PRESSURE
AR PRESSURE
CHARGING
ON
BC PRESSURE
Created by srinivas
NO PRESSURE
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3-PR.VALVE
0 kg/cm2
0.6 3.6 kg/cm2
3.7 3.9 kg/cm2
BC
BC
U-CTLR
A-CTLR
MAX.LR
MIN.LR
0.8
3.8
0.2
0.4
AR
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
5 kg/cm2
4.7-4.2 kg/cm2
4.1- 4 kg/cm2
EXH
R-CHARGER
5 kg/cm2
5

CR
QRV
4.8-3.7
3.6-3.4
BP PRESSURE
0.2 - 1.3 DROP
1.4 - 1.6 DROP
5 kg/cm2
CR PRESSURE
AR PRESSURE
APPLICATION
BC PRESSURE
Created by srinivas
NO PRESSURE
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TAKE LAP POSITION
3.7 3.9 kg/cm2
3-PR.VALVE
0 kg/cm2
1.25 - 3 kg/cm2
BC
U-CTLR
A-CTLR
MAX.LR
MIN.LR
GRADUATED APPLICATION Decrease BP pressure
GRADUATED RELEASE Increase BP pressure
AR
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
BP kg/cm2
BC kg/cm2
BP kg/cm2
BC kg/cm2
5 kg/cm2
4.7-4.2 kg/cm2
4.1- 4 kg/cm2
4.8
3.6
0.6
3.8
EXH
4.6
3.8
1.2
3.6
R-CHARGER
4.0
3.0
5 kg/cm2
4.4
1.8
5
4.2
2.4
4.2
2.4

CR
4.0
4.4
3.0
1.8
QRV
3.8
4.6
3.6
1.2
3.6-3.4
BP PRESSURE
3.6
4.8
3.8
0.6
0.5 - 1.2 DROP
1.4 - 1.6 DROP
5 kg/cm2
CR PRESSURE
AR PRESSURE
APPLICATION
BC PRESSURE
Created by srinivas
NO PRESSURE
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3-PR.VALVE
0 kg/cm2
3.7 3.9 kg/cm2
BC
U-CTLR
A-CTLR
MAX.LR
MIN.LR
AR
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
5 kg/cm2
4 - 4.1 kg/cm2
0
EXH
R-CHARGER
5 kg/cm2
5

CR
QRV
0
BP PRESSURE
5 DROP
5 kg/cm2
CR PRESSURE
AR PRESSURE
EMERGENCY
BC PRESSURE
Created by srinivas
NO PRESSURE
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3-PR.VALVE
0 kg/cm2
3.7 3.9 kg/cm2
BC
BC
U-CTLR
A-CTLR
MAX.LR
MIN.LR
AR
EXH
Created by A.srinivas JE/AB/WWS/GTPL/SCR
5 kg/cm2
4 - 4.1 kg/cm2
0
5
EXH
R-CHARGER
5 kg/cm2
5

CR
QRV
5
0
BP PRESSURE
5 DROP
5 kg/cm2
CR PRESSURE
AR PRESSURE
RELEASE
BC PRESSURE
Created by srinivas
NO PRESSURE
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3-PR.VALVE
0 kg/cm2
BC
BC
U-CTLR
A-CTLR
MAX.LR
MIN.LR
AR
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
5 kg/cm2
4.9 kg/cm2
4.8 kg/cm2
4.7 kg/cm2
EXH
4.9
4.8
4.7
R-CHARGER
5 kg/cm2
4.9
4.8
4.7
5

CR
QRV
BP PRESSURE
0.3 kg/cm2 in 60 sec.
5 kg/cm2
CR PRESSURE
AR PRESSURE
INSENSITIVITY
BC PRESSURE
Created by srinivas
NO PRESSURE
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3-PR.VALVE
0 kg/cm2
1.5 kg/cm2
BC
BC
U-CTLR
A-CTLR
MAX.LR
MIN.LR
0.8
0.2
0.4
AR
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
5 kg/cm2
4.6 kg/cm2
EXH
R-CHARGER
5 kg/cm2
5

CR
QRV
4.4
BP PRESSURE
0.6 kg/cm2 in 6 sec.
5 kg/cm2
CR PRESSURE
AR PRESSURE
SENSITIVITY
BC PRESSURE
Created by srinivas
NO PRESSURE
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3-PR.VALVE
EMPTY
LOAD
MAX.LR
MIN.LR
U-CTLR
A-CTLR
PT
Created by A.srinivas JE/AB/WWS/GTPL/SCR
EXH
AR
EXH
R-CHARGER
BC
5 kg/cm2
5

0
0.4-2.2
0.6-3.8
CR
QRV
LSD
AR
4.8-0

BP PRESSURE
5 kg/cm2
0.2-5 kg DROP
CR PRESSURE
AR PRESSURE
SPRING PLANK
EK PT
BC PRESSURE
Created by srinivas
NO PRESSURE
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All effects created with power point,some effects
goes wrong Due to not supporting
powerpoint Further information plz.contact avutapa
llysrinivas_at_gmail.com
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Thank you