Product Manual

10
Air Chain
Hoists
866-207-6923
MLK and HLK Series
0.25 to 6 metric ton liing capacities
Benefits
• 100 percent duty cycle enables continuous operation
• Dust, dirt, moisture, and corrosive gases kept out of
the motor by air pressure — ideal for foundries and
electro-plating applications
• Minimum chance of electrical shock makes air hoists
ideal for highly flammable environments such as
chemical plants and refineries; spark-resistant models
also available
• Simple pull-chain speed and directional controls provide
precise load-spotting capabilities; easy-to-operate pendent
air valves provide a variable control signal with adjustable
response by a variable orifice. For more precise control, MLKS
slow-speed models are available.
• Motor, brake, and throttle parts are interchangeable
with all current Ingersoll Rand air chain hoists
• Ingersoll Rand air chain hoists are designed and constructed
for trouble-free maintenance
Top and bottom latch-type swivel hooks
meet OSHA requirements and are supported
by anti-friction roller bearings (Bullard
Burnham hooks are available for all models,
except spark-resistant)
All bearings are either ball- or roller-
type to minimize friction
An internal muer reduces sound
levels to 85 dBA; woven to prevent
corrosion and clogging
Inlet swivel and strainer are
combined for easy hookup from any
direction — swivel reduces hose
fatigue, especially on hook-mounted
units; strainer nipple provides extra
assurance of clean air for maximum
wear protection
Precision throttle valves for
smooth operation and metering of
air; valves are poppet-type for ease of
maintenance
Control adjustment screws provide
sensitivity and maximum speed control
for pendent models
Pilot pendent control provides a
variable pressure signal to the valve
chest, where flow to hoist is metered
accordingly; air does not travel
through pendent, thus pendent length
does not aect performance; control
hoses are small, flexible, and easily
converted to dierent lengths
One-piece, cast-aluminum
guarded pendent handle for
maximum durability; guards on
either side of levers are cast-in
for protection against accidental
operation; all functional parts are
corrosion- and spark-resistant
Two-piece, single-line hook block entraps
chain links and hook bearing without using
small load-bearing pins or fasteners
Standard link load chain is zinc-plated steel;
stainless steel chain available for 0.25-ton
through 1-ton spark-resistant models
Fabric or metal container keeps slack chain
out of the way
Upper and lower limit stops prevent
dangerous over-travel of the hook in either
direction, reducing possible damage to hoist
or load
Slack chain is guided into drive wheels by
a specially designed opening that prevents
dangerous cross-linking
A small amount of exhaust air flows over chain
and drive wheel to help lubricate chain from
spent in-line lubrication of motor
Air-operated, non-asbestos, self-
adjusting disc brake balances eort to
motor torque by sensing air pressure in the
valve chest, providing precise control and
eliminating back-drop encountered with some
mechanical brakes; if air supply is interrupted,
pressure release causes instantaneous,
automatic braking
Heat-treated planetary gearing system
provides high-torque capability by splitting the
torque path, thereby dividing and balancing
the load over more teeth, assuring longer life
and reduced maintenance
High-strength aluminum housing
is strong yet lightweight for maximum
portability and weather resistance
Manual brake release kit allows operators
to safely lower a suspended load in a power
failure
100 percent duty-cycle multi-
vane motor with high torque, low
maintenance design, and air porting
under vanes for smooth operation,
positive starting, and long life