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Flat Disc Type

Flat Disc Type Temporary Strainer

Flat Disc Type strainers look like a tennis bat and comprises a flat disc, which incorporates a perforated hole section covering the pipe bore area. Although not advisable, meshes are sometimes added to one side facing the flow for finer straining. To identify and assist handling, a handle is provided onto which is normally stamped the size and rating of the flange and the strainer retention.


  • Low Cost
  • Ease and simplicity of installation, no need for spool pieces etc.


  • Open filtration is less than pipe bore area, which will induce higher initial pressure differentials
  • Reduces process flow slightly
  • Low dirt holding capacity - will clog up very quickly if large quantity of contaminant is present


For installation between raised face flanges. The outer edge of the disc fits just inside the bolting circle.


For installation between full face or flat flanges.


For installation between ring type joint flanges. Can be supplied with either oval or octagonal rings.

Size range: From ¾” (20mm) nb to 48” (1200mm) nb
Pressure ratings: Up to 600LB as standard and specials upto 2500LB.
Flange facings include: flat, serrated, ring joint, male and female, tongue and groove.

Materials of construction range from Carbon Steel, various grades of Stainless Steel to high performance exotic materials such as Duplex Stainless Steel, 6Mo Stainless Steel, Monel, Inconel, Titanium etc.

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GFSA Limited designs and manufactures filtration and process equipment which is environmentally friendly and exhibits leading edge technology.