Nexen BTBA-10 927409 - Manual (Page 8)

8 FORM NO. L-21180-E-0111
NOTE: Refer to Figures 5 and 6.
NOTE: For optimum operation, use clean air filtered to
5 microns or better.
The BTBA-10 has six air ports; the BTBA-12 has eight air
ports. All air ports accept 1/8 inch NPT fittings. Use the
tee fittings (Item 38) and elbow fittings (Item 37) that are
enclosed with the brake. Air line fittings can be made in
two configurations.
4-S
ource
c
ontrol
(BtBa-12)
For use with four air sources:
The air can be interrupted or supplied to any combination
of the four pairs of ports. Two opposing ports comprise a
pair. The torque output is related to a change in air pressure
and the number of pistons used. Always use pistons in
opposing pairs.
3-S
ource
c
ontrol
(BtBa-10)
For use with three air sources:
The air can be interrupted or supplied to any combination
of the three pairs of ports. Two opposing ports comprise a
pair. The torque output is related to a change in air pressure
and the number of pistons used.
1-S
ource
c
ontrol
(BtBa-10 & -12)
For use with one air source:
Connect all ports together. The 1-Source Control relates the
change in torque performance to change in air pressure only.
AIR CONNECTIONS
Figure 5
3-Source
Figure 6
1-Source
CAUTION
ONLY use pistons in pairs. The bearings
may fail prematurely if you only use one
port. If a pair of ports is unbalanced then
the bearings may fail prematurely.
NOTE
For quick response, Nexen recommends a quick
exhaust valve and short air lines between the Control
Valves and the product. Align the air inlet ports to a
down position to allow condensation to drain out of
the air chambers of the product.
CAUTION
Low air pressure will cause slippage and
overheating. Excessive air pressure will
cause abrupt starts and stops, reducing
product life.
All Nexen pneumatically actuated devices require clean
and dry air, which meet or exceeds ISO 8573.1:2001
Class 4.4.3 quality. The following is a common air supply scheme used with
this product. This is an example and not an all-inclusive
list. All air circuits to be used with this product must be
designed following EN983 guidelines.