Sewage plant filtering Food processing plant filtering Pipeline filtering

Basket Strainer

Duplex Basket Strainers / Pipeline Strainers

Duplex Basket Strainers

Application

Duplex Basket Strainers are designed for applications where continuous flow must be maintained whilst cleaning filter baskets. The strainer uses integral 3 way stainless steel ball valves with PTFE seals. This design provides drop tight shutoff eliminating costly and potentially dangerous leakage into the chamber not in use which can occur in some other duplex strainer designs. This also eliminates some problems which can occur in particular suction conditions where in other designs air ingress could occur. All parts of the valve mechanism are accessible after removing the basket chamber without taking the strainer out of the pipeline.

The handle covers the basket strainer chamber when in use and prevents accidental opening of the filter cover.

  • Available in cast iron, bronze, carbon and stainless steel.
  • Pipeline sizes from 20mm (3/4”) to 200mm (8”) (ask for details of sizes above 200mm).
  • Available flanged in all common drillings including PN16 and ANSI150 (ANSI300 and 600 on request) and screwed ports both BSP and NPT or socket weld.
  • XD range up to 13.8 Barg (pressure stated at 50C, lower pressure at
    higher temperatures, ask if unsure). Temperature limited by chosen seal.
    Pressure also limited by flange rating.
  • Large filter baskets areas, manufactured in st. steel 316.
  • Various options including differential pressure indicator, magnets and
    heating jackets.
  • Can be coated internally and externally.

Bore Size Flanged
Filters
Threaded
Filters
Common Dimensions (mm) Basket
Area
MASS (dry)
Flanged Screwed
  A A B C D E F G H CM sq Kg KG
DN20/25 178 142 329 148 305 243 - 224 - 130 21 19.8
DN32/40 238 191 284 205 377 335 136 260 12 243 33.5 31.7
DN50 270 254 468 271 471 400 158 310 14 425 55 54
DN65 343 292 560 347 579 538 158 310 14 701 107.5 103
DN80 343 - 560 347 579 538 196 370 14 701 108 -
DN100 406 - 682 403 649 637 228 464 17 1057 169.5 -
DN150 559 - 897 621 905 640 310 600 24 2060 390 -
DN200 680 - 1368 772 1146 820 416 834 24 4022 TBA -

N.B. Table data refers to PN16 & ANSI125/150 only

Basket Strainer and Mesh Data

Basket Strainer, Duplex Basket Strainers, Pipeline Strainers, Strainers

MESHES PER LINEAR INCH SIZE OF APERTURE
20 mesh0.91mm
30 mesh0.56mm
40 mesh0.38mm
60 mesh0.25mm
80 mesh0.19mm
120 mesh0.13mm
200 mesh0.08mm
300 mesh0.05mm

The chart is for water (1cSt) flowing through a filter with an element coarser than 1 millimetre perforations. For correction factors for varying viscosity/mesh size, please see our Simplex data sheet or consult Oxford Filtration Ltd.