7
FORM NO. L-20077-X-1018
Air
Supply
Brake
Inlet
Gauge
Regulator
Filter
Dryer
Typical Brake Control Circuit
3/2 (3 Way)
N.C. Valve
Quick
Exhaust Valve
AIR PRESSURE:
8 BAR (120 PSI) ABSOLUTE MAX
0 BAR (0 PSI) ABSOLUTE MIN
AIR CONNECTIONS
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 ISO-4414 guidelines.
NOTE: Refer to Figure 4.
FIGURE 4
Important - Install the Restrictor Valve in the brake
air inlet.
TSE brakes are equipped with three Shoulder Screws
(Item 6) connecting the Piston Plate (Item 3) and the
Cylinder (Item 10).
Springs (Item 7), mounted on the Shoulder Screws prevent
Cylinder vibration when the brake is engaged.
The Shoulder Screws are under tensile stress when the
air is applied to disengage the brake. Cylinder thrust pulls
the Shoulder Screw in one direction at the same time the
engagement Springs are applying a force load on the screw
in the opposite direction.
Restrictor Valve (Item 22) slows the air entering the brake
to eliminate shock loading on the shoulder screw heads.
The Restrictor Valve does not slow the air exhausting from
the Cylinder allowing the brake to engage quickly.
NOTE: The Auxiliary Cooling Option has been
removed from all standard Nexen S, T, and TSE
series brakes. It is a passage for compressed air to
be connected for increased thermal capacity. If you
desire this feature or are replacing a brake that has
this feature please contact Nexen at 1-800-843-7445.
Install
Restrictor (Item 22)
Air Hose Assembly
with 45° Flared x 1/8 NPT
Connector (Item 19)
CAUTION
Never operate brake without the Restrictor
(Item 22) installed.
