Elasticity And Mounting Requirements - Pentair 80E User Manual

ELASTICITY AND MOUNTING REQUIREMENTS

Mounting design must allow for vessel expansion, both axially and radially. Although the
expansion under pressure is slight, undue restriction can result in damage to the vessel and to
other system components. Typically a eight-element vessel, to example, would expand
approximately 0.20 inch (5.08 mm) in length and 0.015 inch (0.4 mm) in diameter. The following
suggestions will help to ensure the vessel is allowed to expand and will ease servicing.
1. Mount the vessel on the urethane support pads furnished. Do not mount directly to any rigid
structure.
2. Use the stainless steel straps furnished. Straps should be tightened sufficiently to hold the
vessel on the urethane support pads, but not so tightly so as to restrict expansion. (A torque
of 25-50 lbs-in. is sufficient.)
3. U-bolts should not be used for vessel mounting under any circumstances.
4. Provide flexible piping connection to permit de-coupling the header from the vessel. The
recommended Permeate Port connection is a U-bend pipe with flexible connections at each
end, or a flexible hose. Recommended Feed and Concentrate connections are via flexible
IPS grooved coupling.
5. Do not hard plumb any piping connections to the vessel.
6. Support the header independently. Piping should be self-supporting or supported by the
headers.
7. Include an expansion loop in the branch connection to allow for:
A. Elastic growth under pressure.
B. Thermal growth in vessel length.
8. The total weight of branch connection and fittings supported by the vessel should not exceed
8 lbs for either the Feed / Concentrate ports or the Permeate port for CodeLine 80E model
vessels.
The above suggestions are intended to help prevent damage in typical applications. Unusual or
special applications may involve other considerations to be determined by the system designer.
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