Instruction Manual

5
Piping: shut off valves. This permits susceptible to dirt and other
Pipe size and length are calibration tube for calibration accumulation can cause
critical to proper operation of of the pump at start up or any malfunction. Be sure to use a
any metering pump. A future date. A tee in the pipeline strainer in the suction
restricted discharge or starved discharge piping is a must on line between the suction shut
suction condition spells a good installation because it off valve and the pump
immediate failure to any permits ease of mounting a suction valve, 100 mesh
metering pump installation. A pressure gauge to check screen is preferred.
separate brochure entitled discharge pressure at the
"Designing a Successful pump and setting the Flush Piping System:
Metering Pump Installation" is hydraulic bypass valve during Whether new or old piping is
provided to assist Engineers start up and future used, all lines should be
responsible for piping system maintenance functions. To flushed with a clean liquid or
design. Copies are available prevent strain on the pump air before connecting the
upon request (Technical fittings use pipe straps and pump to carry out pipe scale
Sheet 304). Inlet piping must braces. Do not allow the or other foreign material.
be at least equal in size to weight of the piping to be Make sure flushing liquid is
pump inlet connection. supported by a pipe union, the compatible with the chemical
Figure A shows the preferred the pump head or leaks will
piping configuration for a occur. An air leak at a union Metal Reagent Head
good metering pump or other fitting in the suction Models:
installation. A good piping piping can severely affect
installation metering accuracy and is The metal reagent head
addresses present and future extremely difficult to detect. In assembly is provided in
requirements of the metering assembly of piping, use pipe several alloys. Piping of
system. Plan for shut off thread tape or a compound similar alloy should be
valves and unions or flanges compatible with the product selected. Dissimilar materials
installed on both suction and handled. If rigid piping is used can cause galvanic corrosion.
discharge lines. This allows we suggest bolting the pump
inspection of the check valves to its foundation. Do not backweld piping to the
without draining long runs of valve housings without first
pipe. Install a tee in the Use Strainers: removing the valve housings
suction and discharge piping from the pump as excessive
between the pump and the Pump check valves are heat can damage the reagent
easy installation of a contaminants and any
valve fitting or other portion of to be pumped.
head and other parts. Tie
bars must be positioned on
the valve housing before
welding.
Plastic Reagent Head
Models:
Care must be exercised when
making connections on plastic
reagent head models.
Excessive tightening can
distort or break the plastic
materials. Tubing should be
rated for the highest discharge
pressure expected. DO NOT USE
METAL PIPING.