2.9.12.3
Welded steel type with detachable compression grip-type hubs, steel plate
ends, and crown faces 50 mm 2 inches wider than the belt width.
Provide a
multiple belt scraper at each head pulley.
2.9.12.4
Magnetic Pulley
Drive pulley of [_____] conveyor shall be a nonelectric permanent magnet
type designed to remove tramp iron. Provide a removable pan to collect the
tramp iron.
2.9.12.5
Belt
Synthetic fabric, not less than [_____] mm inches wide, a minimum of
[_____] ply, with 3 mm 1/8 inch thick oil and chemical resistant cover on
carrying side, [1.59] [0.79] mm [1/l6] [1/32] inch thick oil and chemical
resistant rubber cover on under side. Cover shall be fire resistant. Belt
shall have a tension pull strength of not less than [_____] N per mm pounds
per inch of belt width. Belt shall have vulcanized splice.
2.9.12.6
Electric Motor
Totally enclosed, fan cooled, high torque, [_____] volt, three phase, 60
Hz, not less than [_____] kW hp as specified under paragraph entitled
"Motors and Drives" in this section. Motor shall be direct connected by
means of flexible coupling with guard to a reduction gear.
2.9.12.7
Reduction Gear
Alloy steel helical gear type enclosed in an oil tight housing. Provide an
adjustable base for mounting motor and reducing unit. Drive from the
output shaft of the speed reducer to the conveyor head shaft shall be by
means of finished steel roller chain conforming to ASME B29.1M running over
cut tooth sprockets conforming to ASME B29.1M and complete with steel plate
chain guard. Roller chain attachments shall conform to ASME B29.1M.
Provide means to properly tension drive chain.
2.9.12.8
Backstop
Differential band brake type, cam type, or internal type to prevent
reversal of belt.
2.9.12.9
Emergency Stop Cord and Switch
Provide emergency stop cord the length of the conveyor to actuate a switch
for stopping the conveyor. Switch shall have flag to indicate actuated
switch and shall have positive safety lock that cannot be accidentally
reset. Cord shall be not less than 2.38 mm 3/32 inch galvanized aircraft
cable with a minimum 1.19 mm 3/64 inch vinyl or nylon protective coating.
Provide sufficient number of switches to prevent cable weight from
actuating switch.
2.9.12.10
Belt Alignment Switch
Provide on each side of belt mounted off conveyor frame or discharge chute
to stop conveyor under belt misalignment or runoff conditions. Mount
switches on breakaway mounts to prevent damage from runaway belt.
SECTION 15502N
Page 109
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