Auxiliary cooling air connections, Operation, Warning – Nexen T-450 819001 User Manual
Page 7: Caution
7
FORM NO. L-20071-R-1211
NOTE: The auxiliary cooling option is not a standard
feature. It is a passage through which compressed air
can flow for increased thermal capacity. If you desire
this feature or are replacing a brake that has this feature
please contact Nexen at 800-843-7445.
NOTE: Do not use rigid pipe or tubing when making
air line connections.
A 10-32 tapped hole in the piston plate allows auxiliary
cooling of the brake's friction surface (see Figure 3).
Auxiliary cooling increases the brake's thermal capacity
approximately 0.1 HP
t
per 100 SCFH of cooling air over
the brake's rated thermal horsepower at any RPM (see
Table 2).
EXAMPLE: A T-1000 develops 1.0 HP
t
at 200 RPM.
Referring to Table 2, 80 psi of cooling air increases the
HP
t
0.4 (400 SCFH/100 x 0.1). RESULT: Total HP
t
is
1.0+0.4=1.4 HP
t
.
NOTE: Use non-lubricated air tapped off the air line
ahead of the lubricator.
Hose assembly part number is 857000.
AUXILIARY COOLING AIR CONNECTIONS
FIGURE 3
500
400
300
200
100
10
20
30
40
50
60
70
80
90 100
F
LO
W
R
A
TE
(
S
C
F
H
*)
AIR PRESSURE (PSI)
TABLE 2
*Standard Cubic Feet per Hour
WARNING
Never exceed maximum operating speeds
listed for your product. (See Table 3).
OPERATION
CAUTION
TABLE 3
CAUTION
The temperature limits for this product
line are 4.5-100 Degree Celsius (40-
220 Degree F).
Never exceed life of facing material. Facing
life depends on the volume of material and
the total energy over the life of the unit.
Expected life (in hrs) can be found by:
Time=Volume/(Power*Wear Rate).
Sizes
Max RPM
T-450 - T-1000
1800*
T-450A
4,500
T-600A
4,000
T-800A
3,500
T-1000A
3,000
*Consult Nexen for high speed applications.
- T-450 819005 T-450 819000 T-450 819007 T-600 820607 T-600 820601 T-600 820600 T-800 824200 T-800 824212 T-800 824207 T-800 824201 T-800 824204 T-1000 824301 T-1000 824300 T-1000 824309 T-1000 824307 T-450 818910 S-450 818910 T-600A 820503 S-600A 820503 T-600 820510 S-600 820510 T-800A 827402 S-800A 827402 T-800 827410 S-800 827410 T-1000A 827502 S-1000A 827502 T-800 827401 S-800 827401 T-1000 827501 S-1000 827501 T-450 818901 S-450 818901 T-600 820501 S-600 820501 T-450 818904 S-450 818904 T-800 827400 S-800 827400 T-450 818900 S-450 818900 T-450A 818903 S-450A 818903 T-1000 827500 S-1000 827500 T-600 820500 S-600 820500 T-1000 827510 S-1000 827510 T-450A 819006 T-450A 819004 T-450A 819003 T-600A 820606 T-600A 820605 T-600A 820604 T-800A 824202 T-800A 824205 T-800A 824203 T-1000A 824308 T-1000A 824306 T-1000A 824305