Auxiliary cooling air connections, Operation, Warning – Nexen S-450 827801 User Manual
Page 7: Caution
7
FORM NO. L-20087-P-1112
AUXILIARY COOLING AIR CONNECTIONS
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 auxil-
iary 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 1).
EXAMPLE: A S-1000 develops 1.0 HP
t
at 200 RPM.
Referring to Table 1, 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.
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 1
*Standard Cubic Feet per Hour
WARNING
Never exceed maximum operating speeds
listed for your product. (See Table 2).
OPERATION
TABLE 2
CAUTION
The temperature limits for this product
line are 4.5-100 Degree Celsius (40-
220 Degree F).
CAUTION
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).
Size
Max RPM
S-450 - S-1400
1800*
S-450A
4,500
S-600A
4,000
S-800A
3,500
S-1000A
3,000
WARNING
Ensure proper guarding of the product is
used. Nexen recommends the machine
builder design guarding in compliance
with OSHA 29 CFR 1910 “Occupational
Safety and Health Hazards”.
*Consult Nexen for high speed applications.
- S-450 827800 S-450 827812 S-450 827803 S-450 827804 S-450 827805 S-450 827808 S-450 827806 S-450 827807 S-450 827824 S-450 827814 S-450 827826 S-450 827828 S-450 827811 S-450 827809 S-450 827817 S-450 827823 S-450 827810 S-450 827829 S-450 827822 S-450 827830 S-450 827815 S-450 827816 S-600 827914 S-600 827901 S-600 827903 S-600 827900 S-600 827925 S-600 827928 S-600 827906 S-600 827902 S-600 827919 S-600 827911 S-600 827913 S-600 827915 S-600 827910 S-600 827916 S-600 827917 S-600 827912 S-600 827918 S-800 828000 S-800 828014 S-800 828003 S-800 828020 S-800 828004 S-800 828002 S-800 828001 S-800 828019 S-800 828012 S-800 828022 S-800 828021 S-800 828005 S-800 828009 S-800 828015 S-800 828016 S-800 828018 S-800 828010 S-800 828017 S-800 828031 S-1000 828101 S-1000 828100 S-1000 828112 S-1000 828113 S-1000 828104 S-1000 828103 S-1000 828116 S-1000 828118 S-1000 828107 S-1000 828190 S-1000 828114 S-1000 828119 S-1000 828111 S-1000 828191 S-1000 828115 S-1000 828117 S-1000 828192 S-1000 828110 S-450A 827821 S-450A 827820 S-450A 827827 S-450A 827819 S-450A 827818 S-600A 827908 S-600A 827907 S-800A 828029 S-800A 828008 S-800A 828023 S-600A 827926 S-600A 827905 S-600A 827904 S-600A 827927 S-600A 827921 S-600A 827922 S-600A 827923 S-600A 827924 S-600A 827909 S-800A 828006 S-800A 828007 S-800A 828026 S-800A 828025 S-800A 828032 S-1000A 828122 S-1000A 828121 S-1000A 828126 S-1000A 828108 S-1000A 828109