Page 22 of Ingersoll Rand Industrial Lifting Catalog by Ingersoll Rand Industrial Technologies

mlk and hlk series air chain hoist 1/4 ­ 6 metric ton lifting capacity benefits of using an ingersoll-rand air chain hoist ˇ ˇ 100 duty cycle air hoists can be operated continuously as air motors don t heat up environment dust dirt moisture and corrosive gases are kept out of the motor by the air pressure that runs it this basic fact makes air hoists the first choice in foundries electroplating shops etc no electrical hazard as no electricity is used the freedom from electrical shock and the use of air power in explosive environments are obvious advantages this is why air hoists are used extensively in flammable environments found in chemical plants refineries etc spark resistant models are also available accurate load spotting simple pull chain speed and directional controls provide precise spotting capabilities easy to operate pendent air valves provide a variable control signal with adjustable response by a variable orifice for even more precise control mlks slow speed models are available most parts interchangeable motor brake and throttle parts are interchangeable with all current ingersoll-rand air chain hoists low maintenance ingersoll-rand air chain hoists are designed and constructed for trouble-free maintenance the inherent durability of air power contrasts with the potential problems of electrical systems ˇ ˇ ˇ ˇ features 1 latch type swivel hooks top and bottom meet osha requirements supported by anti-friction roller bearings bullard burnham hooks are available for all models except spark resistant 2 anti-friction bearings all bearings are either ball or roller type to minimize power-robbing friction 3 internal muffler reduces sound level to 85 dba located internally in the valve chest for protection against damage element is woven to prevent corrosion and clogging 4 inlet swivel and strainer combined to allow easy hookup from any direction swivel reduces hose fatigue especially on hook-mounted units strainer nipple provides that extra assurance of clean air for maximum wear protection 5 precision throttle valves for smooth operation and metering of air valves are poppet type for ease of maintenance 6 100 duty cycle multi vaneŽ motor high torque low maintenance design with air porting under vanes for smooth operation positive starting good control and long life 7 control adjustment screws provide sensitivity and maximum speed control for pendent models adjustment of screws will provide maximum control for each hoisting application 8 pull chain control provides maximum load spotting capability simple conversion from pull chain to pendent control because no internal modification is necessary 9 pilot pendent control furnishes a variable pressure signal to the valve chest where flow to hoist is metered accordingly air to run hoist motor does not travel through pendent thus pendent length does not affect performance control hoses are small very flexible and easily converted to different lengths 10 guarded pendent handle one-piece cast-aluminum for maximum durability guards on either side of levers are cast-in for protection against accidental operation all functional parts are of corrosion and spark resistant materials 11 two-piece single-line hook block two-piece clam shell design entraps chain links and hook bearing without using small load bearing pins or fasteners 12 link load chain zinc plated steel chain is standard stainless steel chain is available for the 1/4 ton through 1 ton spark resistant models 13 chain container fabric or metal container as an accessory to keep slack chain out of the way 14 upper and lower limit stops prevent dangerous overtravel of the hook in either direction reducing possible damage to hoist or load 15 built-in cross-link protection slack chain is guided into drive wheels by a specially designed opening which prevents dangerous cross-linking of chain 16 exhaust air chain lubrication a small amount of exhaust air flows over chain and drive wheel this flow helps to lubricate chain from spent in-line lubrication of motor air chain hoists 22

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