2.10
GEAR MOTOR MOUNTING
The comminutor gear motor shall be mounted [close-coupled with the
comminutor] [on [an open] [a gas tight] stand with universal shaft to the
comminutor. Universal shaft shall be enclosed in protective piping to
elevation indicated. Protective piping shall be provided with a tapped and
plugged hole for drainage] [on an extension pipe at the elevation indicated
with universal shafting to the comminutor. Extension pipe shall be
equipped with handholds to allow inspection and repair of shafting].
2.11
HYDRAULIC DRIVE
Hydraulic actuator shall be mounted on the unit and connected to the shaft.
The pressurized hydraulic fluid shall be by a power unit that includes an
oil reservoir, motor-driven positive displacement pump, and all necessary
control valves. The pump motor shall be constant speed [totally enclosed]
[totally enclosed fan cooled] [explosion-proof], vertical type suitable for
outdoor service and conform to NEMA MG 1. Motor shall be protected against
overload, low voltage, and unbalanced voltage. Rubber-covered
abrasion-resistant pressure hose with suitable connectors shall be provided
for connecting the power unit to the hydraulic actuator.
2.12
CUTTING ELEMENTS
Secured elements, combs, teeth, and bars shall be corrosion- and
wear-resistant chrome-tungsten type alloy or equal possessing Brinell
Hardness of 450 or better. Elements shall be readjustable to compensate
for wear, and removable for sharpening or replacement.
2.13
BEARINGS
Bearings shall be of the antifriction type having a rating-life expectancy
(L-10) of 100,000 hours when equipment is operating continuously.
[Intermediate guide bearings, where required for extended shafting, shall
be provided for adequate support and alignment and shall be of the ball
bearing type enclosed in a self-aligning pillow block housing.]
2.14
LUBRICATION
All moving parts of the comminutor shall be lubricated and protected from
be either oil or grease lubricated. Gear reduction unit shall be oil
lubricated. Oil lubricated bearings and reduction units shall have sight
glass or other positive means of determining oil level. Grease-lubrication
pressure-line fittings and oil fill and drain lines shall be easily
accessible when comminutor is in place.
2.15
ANCHORAGE
2.15.1
Installation Within a Channel
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NOTE: Delete this paragraph when comminutor is to
be installed in a pipeline.
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The comminutor, motor, power unit, guide bearings, and all equipment
requiring attachment to structural supporting members shall be furnished
complete with bolts, nuts, anchors, washers, sole plates, or any other type
SECTION 11331
Page 10
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