7
FORM NO. L-21272-C-0215
Nexen's FMBS engages when the air supply is exhausted
by the control valve or when there is a loss of air supply,
and disengage when air pressure is applied (See Table 1).
TABLE 1
AIR CONNECTIONS
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
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.
For maximum performance, mount the control valve as
close to the FMBS as possible.
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.
WARNING
Never exceed maximum operating
speeds listed for your product.
(See Table 2).
OPERATION
TABLE 2
Model
Max RPM
FMBS 1125-1625
1,800
CAUTION
The temperature limits for this
product line are 4.5-104 Degree
Celsius (40-220 Degree F).
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”.
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).
MINIMUM DISENGAGEMENT AIR PRESSURES
MODEL
AIR PRESSURE
FMBS-1125
N/A
FMBS-1375
55 PSI
FMBS-1625
90 PSI
CAUTION
Do not use more air pressure than
required to release the brake (120
psi maximum).
CAUTION
Large amounts of friction material dust are
generated with frequent dynamic cycling.
Ensure all appropriate air quality and PPE
requirements are being addressed.
