Hydrotech C, C PLUS, A PLUS, E, E-DC and E PLUS Series PULSAtron - Manual (Page 7)

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3.2 MATERIALS OF CONSTRUCTION cont'd.
Consult a Chemical Resistance Guide or Supplier for information on chemical
compatibility.
Various manufacturers of plastics, elastomers and pumping equipment publish
guidelines that aid in the selection of wetted materials for pumping commercially
available chemicals and chemical compounds. Two factors must always be
considered when using an elastomer or plastic part to pump chemicals. They are:
• The temperature of service: Higher temperatures increase the effect of chemi-
cals on wetted materials. The increase varies with the material and the chemical
being used. A material quite stable at room temperature might be affected at
higher temperatures.
• Material choice: Materials with similar properties may differ greatly from one
another in performance when exposed to certain chemicals.
4.0 INSTALLATION
The metering pump should be located in an area that allows convenient connections
to both the chemical storage tank and the point of injection. The pump is water
resistant and dust proof by construction and can be used outdoors, however, do not
operate submerged. Avoid continuous temperatures in excess of 104
°F (40°C). To
do otherwise could result in damage to the pump.
4.1 MOUNTING
Typical mounting arrangements are shown in Figures 3, 4, and 5.
Important: Injection point must be higher than the top of the solution supply
tank to prohibit gravity feeding, unless suitable backpressure is
always present at the injection point. Installation of an antisiphon
valve will prohibit gravity feeding.
• For wall or shelf mounting refer to Figure 3. Connect suction tubing to suction
valve of chemical pump. Suction valve is the lower valve. Tubing should be
long enough so that the foot valve/strainer assembly hangs about 1-2 inches
(2-5 cm) above the bottom of chemical tank. To keep chemical from being
contaminated, the tank should have a cover.