Concord Screen Inc manufacurer of wedge wire screens laterals headers screen vee wire profile filters filter nozzles elements.

Concord Screen CAT & CAX

Design

Concord Screen Modular Filter Systems consist of three (3) or more single filter units valved in parallel to common headers. The advantage of this type of filter system is that each filter unit can be individually backwashed either automatically, manually, or intermittently while the others remain on stream.

Principle of Operation

The filter works by unfiltered liquid entering the inlet header. It flows through the valve and upward through the filter media from outside to inside. The filtered liquid discharges through the outlet header at the top of the unit.

Backwashing

With the direction of flow (outside to inside), the solids build up on the outside of the filter elements. This makes the element very easy to backwash.

Backwashing takes place when the differential pressure between the inlet header and outlet header reaches a preset level. At this point, the filter control module triggers a backwash sequence. In turn, each filter is cleaned while the other units remain on stream.

Internal or External Backwashing

Internal backwashing is when the filtered liquid is used for backwashing. External backwashing is when a secondary liquid is used. Internal backwashing is usually recommended where the process liquid is free flowing, inexpensive, and plentiful. External backwashing is recommended when the operating pressure is too low for effective backwashing, or when it is not economically feasible.

Standard Features

Positive basket seal to prevent by-pass.
Manual or fully automatic self cleaning.
Continuous flow even while backwashing.
Maintenance on each filter unit can be performed without shutting down the system.
Quick opening cover for easy access to filter media.
Reusable filter elements.