EL-60 AND EL-60/i
EMPTY/LOAD VALVE
TECHNICAL
GUIDE
Technical Guide For The Product User
EL-60/i
EL-60
FEATURES:
The advantages of the EL-60 and EL-60/i are a smaller envelope and smaller equalizing volume than
the conventional SC-1 equipment. In addition:
• The EL-60 and EL-60/i are available in 40%, 50% and 60% proportioning models;
EL-60 has two pipe connections at the rear and one on the side (volume) of the pipe bracket
EL-60/i has all three pipe connections to the rear of the pipe bracket
• The EL-60 and EL-60/i incorporate both sensing and proportioning in one axially operated portion
• A visual indicator shows empty load brake condition
• Automatic replenishment of loading Brake Cylinder in Empty Mode
• Automatic increases in Brake Cylinder pressure during Grade Loading
• Both the EL-60 and EL-60/i are lightweight, with a minimum of parts
• In the empty position (20% load) rock and roll of +/- 1-3/4 inches will not affect the empty load
brake
• In the loaded position, rock and roll of +/- 1-3/4 inches will not affect the loaded car brake
NEW YORK AIR BRAKE CORPORATION
A KNORR BRAKE COMPANY
www.nyab.com
748 Starbuck Avenue, Watertown, New York 13601
Telephone: 315-786-5200  1-888-TEN NYAB
FAX: 315-786-5676 (Administration)
315-786-5675 (Marketing)
KNORR BRAKE LIMITED
675 Development Drive
Kingston, Ontario, Canada K7M 4W6
Telephone: 613-389-4660
FAX: 613-389-8770 (Administration)
613-389-8770 (Sales)
TG-9 / May 2012 / Rev. 09
Page 1 of 4
OPERATION OF THE EL-60 AND EL-60/i EMPTY/LOAD
TECHNICAL AND STRUCTURAL FEATURES
The EL-60 and EL-60/i use upstream air to effect
proportioning. Auxiliary reservoir is equalized with
an upstream volume; therefore there is no loss of
brake cylinder pressure at changeover. In conventional
SC-1 equipment, where the brake cylinder is spilled
over into an equalizing volume.
The load sensing portion of the EL-60 and EL-60/i is
exactly the same as in the traditional S-1 sensor valve, for
proven reliability. However, two changes have been
made to further improve the reliability: First, a wear
bushing has been incorporated in the sensor cover, and
second, the adjusting screw has been enlarged from 5/16
inch to 3/8 inch.
The proportioning valve is similar to the P1 proportioning
valve except that the check valve is installed and moves
with the ratio piston. In this arrangement, the ratio piston
is initially mechanically positioned, and in empty load
brake it is both mechanically and pneumatically positioned.
Grade Loading
In this design, air from the upstream volume may be
recovered to provide a higher pressure as a car is loaded
from empty to load. For example, if the control valve
pressure and volume pressure were 64 psi and the
brake cylinder pressure was 38 psi empty load, as the car
is loaded, the brake cylinder pressure would automatically
increase to 52 psi or a minimum increase of 35% depending on actual brake cylinder pressure.
Installation and adjustment is the same as the SC-1
equipment except that a plug screw need not be removed
to determine empty load. The visual indicator may be
used to perform this set-up function.
Post-Installation Adjustment
NOTE
The car must be empty and positioned on
straight level track in order to properly set the
EL-60 Empty Load valve.
1. No set block is needed to properly set the EL-60 Empty
Load Valve unless trucks are equipped with new
springs, which requires the use of a 1/4" block to
accommodate in-service settling of the springs. See
NYAB document NYS-114 for full set-up instructions.
2. With the brakes fully released loosen the lock nuts,
which secure the sensor arm adjusting screw. Screw
the adjusting screw in as far as it will go.
3. Pull the sensor arm down as far as it will go and hold it in
position. Screw the adjusting screw out until it just touches
the truck side frame, gently return the sensor arm to the
release position, then screw the adjusting screw out the
required complete turns for the valve in the following table in
order to remove the slack from the sensor arm.
60% Valve
50% Valve
40% Valve
4 complete turns
6 complete turns
8 complete turns
INSTALLATION
4. Lock the adjusting screw in place using one lock nut
below and one lock nut above the sensor arm. Be
careful not to change the setting of the adjusting screw
while securing the lock nuts.
Types of Installation
5. To Check the Setting
The EL-60 and EL-60/i may be installed in the same
envelope as the S-1 sensor valve if the equalizing volume
is mounted separately.
The EL-60 is available in right and left hand versions. Left
hand models have the equalizing volume connection on
the left hand side of the pipe bracket when viewed from
the front (the side with the nameplate).
The EL-60/i is available in one configuration.
In a foundation or truck mounted brake application where
one empty load is required per control valve, the equalizing
volume will be 375 cubic inches for 40%, 315 cubic inches
for 50%, or 250 cubic inches for 60%.
With a freight single car test device connected to the
car, charge BP to 90 psi and install a 1" block under the
sensor arm adjusting screw. When the flowrator ball
drops below the top of the tube, move the device
handle to position 5 and make a 20 to 30-psi brake
pipe reduction, then slowly return the handle to position
3. Note that the Empty Load Indicator is not extended.
Recharge BP and remove the block. When the
flowrator ball drops below the top of the tube, move the
device handle to position 5 and make another 20 to 30
psi brake pipe reduction, then slowly return the handle
to position 3. Note that the indicator is extended,
indicating that the system is providing empty car
braking. If the indicator is not extended, readjust the
adjusting screw by repeating steps 1 thru 5.
TG-9 / May 2012 / Rev. 09
Page 2 of 4
E L - 6 0 A N D E L -6 0 / i E M P T Y / L O A D V A L V E S
EL-60 (LEFT HAND MODEL IS SHOWN)
EL-60/i
ALL PIPING CONNECTS TO BACKFACE OF THE PIPE BRACKET IN A UNIVERSAL PATTERN
TG-9 / May 2012 / Rev. 09
Page 3 of 4
E L - 6 0 A N D E L -6 0 / i E M P T Y / L O A D V A L V E S
EL-60 and EL-60/i STATISTICS
Weight approximately 14 lbs.
Model Type
EL-60
LH
40%
EL-60
RH
40%
EL-60/i
40%
EL-60
LH
50%
EL-60
RH
50%
EL-60/i
50%
EL-60
LH
60%
EL-60/i
60%
Valve Complete P/N
774801
780133
780122
771244
776221
777843
770820
777664
Valve Portion P/N
774090
774090
774090
771877
771877
771877
771822
771822
Pipe Bracket P/N
774092
780134
780124
771876
773028
777844
779037
777663
Volume Size
375 cu. in.
375 cu. in.
375 cu. in.
315 cu. in.
315 cu. in.
315 cu. in.
250 cu. in.
250 cu. in.
Volume P/N
782039
782039
782506
782038
782038
782505
782037
782504
CAR PIPING: EL-60
(Left Hand Shown)
DB-60 CONTROL VALVE
EQUALIZING
COMBINED AUXILIARY
AND
EMERGENCY RESERVOIR
CYLINDER
EL-60 VALVE
TG-9 / May 2012 / Rev. 09
Page 4 of 4