Evoqua DEFENDER SP-27-48-487, Operation & Maintenance Manual

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Terms and Definitions
Agitation
– Mechanical or manual movement to dislodge filter aid and dirt from the filter
element.
Bump
– The process which removes the filter aid. See Agitation.
Diatomite-type Filter
– A pressure or vacuum type device designed to filter water through a
thin layer of filter aid.
Differential pressure
– Effluent pressure subtracted from the influent pressure of the filter.
Effluent
– The treated water stream emerging from a unit, system, or process.
Filter Aid
– Finely divided medium used to coat a flextube of a diatomite-type filter.
Flextube
– The filter element on which the filter aid is deposited.
Head Loss
– Total Pressure drop in psi or feet of water between the inlet and outlet of a
component.
Influent
– The untreated water stream entering a unit, system, or process.
Precoat
– Layer of filter aid on flextube of a diatomite-type filter at the beginning of a filter cycle
Regen
– The cycle which applies the filtration media to the flextubes.
RMF
– Regenerative Media Filter. See Diatomite-type Filter.
Working Pressure
– Maximum operating pressure recommended by manufacturer.
Health and Safety
Safety Guidelines
Safety precautions protect against accidents such as personal injury. They may also prevent
damage to equipment and facilities, as well as undesirable process occurrences. These
measures may also maximize operational efficiency by minimizing downtime, maximizing
productivity, or improving overall operating effectiveness.
Warning labels have been placed on the equipment to remind the operator of certain hazards.
Specific personal and product safety notification are also provided within the procedures of this
manual. For more information about these messages, see the Cautions and Warnings section in
the Appendix.
However, the notifications in this manual and the warning labels do not replace the need to be
alert and use common sense when using the equipment.