2.14.9
Chemical Feed Systems
Provide systems complete with storage tank, supporting framework, hinged
cover, mixer, strainers, level indicators, proportioning pumps, relief
valves and interconnecting piping for a complete chemical feed packaged
unit.
2.14.9.1
Storage Tank
Capacity of 190 liters 50 gallons constructed of FRP.
Provide removable,
hinged cover.
2.14.9.2
Exterior Gage Glass
Protected, full height of tank complete with gage cocks.
2.14.9.3
Low Level Alarm
Provide tank with a low level switch to sound alarm and shut down pumps
should level drop to preset minimum.
2.14.9.4
Dissolving Baskets
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NOTE: The chemical feed solution to be used shall
be inserted here.
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Construct baskets of a corrosion resistant material suitable for continuous
immersion in a [_____] solution.
2.14.9.5
Tank Strainer
In suction line to pump.
2.14.9.6
Supporting Steelwork
Provide to adequately support tank, mixer, and the number of proportioning
pumps specified.
2.14.9.7
Agitator
Provide with mounting bracket to mount to storage tank. Agitator shaft and
propeller shall be of stainless steel.
2.14.9.8
Proportioning Pumps
Provide [two] [three] [_____] [simplex] [duplex] proportioning pump[s].
Each pump shall have a minimum capacity of [_____] L/s gallons per hour at
a [_____] kPa (gage) psig discharge pressure. Capacity shall be adjustable
from zero to 100 percent by a convenient screw adjustment of stroke length.
Provide pump with integral check valves. Electric motors shall be
[totally enclosed], [fan cooled], [_____] volts, [_____] phase, 60 Hz as
specified in paragraph entitled "Motors and Drives."
2.14.9.9
Safety Relief Valve
Provide for each pump to discharge back into the tank in event of excessive
line pressure.
SECTION 15501N
Page 135
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