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
190 liters50 gallon capacity constructed of FRP.
Provide removable, hinged
cover.
2.14.9.2
Exterior Gage Glass
Protected, full height of the 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
Construct baskets of a corrosion resistant material suitable for continuous
immersion in a [_____] solution.
**************************************************************************
NOTE: The chemical feed solution to be used shall
be inserted here.
**************************************************************************
2.14.9.5
Tank Strainer
In suction line to pump.
2.14.9.6
Supporting Steelwork
Provide supporting steelwork to adequately support tank, mixer, and the
number of proportioning pumps specified.
2.14.9.7
Agitator
Provide an agitator 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] [_____] proportioning pumps of the [simplex] [duplex]
type. Each pump shall have a minimum capacity of [_____] L/s gph 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 under paragraph entitled "Motors and Drives" in this section.
2.14.9.9
Safety Relief Valve
Provide for each pump to discharge back into the tank in event of excessive
SECTION 15502N
Page 158
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