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Model 50

Eaton Duplex Strainers

Iron, Bronze, Carbon Steel, Stainless Steel - Flanged

Photo of a Model 50 duplex basket strainer.


Plugs and Seals

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Size Body Material Plug Material End Connections Seals
5", 6", 8" Iron Bronze Flanged 125# Buna-N®
5", 6", 8" Bronze Bronze Flanged 150# Buna-N
6", 8" Carbon Steel Bronze Flanged 150# Buna-N
6", 8" Stainless Steel Stainless Steel Flanged 150# Viton

DIN flanges available on 6" only

Pressure Ratings

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Size Rating*
5" 200 psi (13.8 bar)
6" 200 psi (13.8 bar)
8" 150 psi (10.3 bar)

* @ 100 °F (38 °C)

Graph showing the flow rates for Model 50 strainers.


The Eaton Model 50 Plug Type Duplex Strainer is a simple, economical and trouble-free design. This type of strainer is a high-quality, pressure rated plug valve with integral straining baskets. Switching the flow from one basket to the other is accomplished by moving the operating handle through a 90 degree arc. The design is such that it is impossible for this operation to stop the flow because of the unique port design in the diverter plug. The entire switching operation takes less than 30 seconds and no tools are needed. The plug is automatically positioned each time in exactly the right spot by integral stops.


  • Continuous flow - no shutdown for basket cleaning
  • Rugged tapered plug design
  • Lift jack prevents plug galling
  • Quick open cover requires no tools
  • Large capacity baskets
  • Threaded drain
  • Machined basket seat
  • Perforated or mesh stainless steel basket

Prior to this operation, the diverter plug is lifted off its seat by way of the manual, integral lifting jack which is built into the strainer. After switching, the lifting jack is used to reseat the plug. The design of the jack allows for easy lifting and seating, even under high pressure. The diverter plug is limited in the distance it can be raised due to the built in stop. This mitigates material bypassing the plug while being rotated and also debris build up under the plug. The Model 50, with its rugged design and ease of operation, is the best choice for most applications.


  • Ductile iron construction
  • Basket perforations from 1/32" to ½"
  • Basket mesh from 20 to 400
  • Monel baskets
  • Viton®, TFE or EPDM seals
  • Vent valves
  • Drain valves
  • ¼" NPT taps
  • Pressure differential gauge and switch connections
  • Magnetic basket inserts


CAD drawing showing the dimensions of a Model 50 strainer.

Dimensions and Cv Factors

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Pipe Size Cv Factor* in (mm) Weight - lbs (kg)
A B C D E F G H J K L Cast Iron Bronze Carbon Steel Stainless Steel
5 300 18.38 (467) 9.00 (229) 9.75 (248) 33.25 (845) 14.75 (375) 10.25 (260) 17.19 (437) 3/8 19.75 (502) 0.56 (14) 41.00 (1041) 403 (183) 412 (187)
6 420 22.00 (559) 12.88 (327) 12.50 (318) 36.25 (921) 19.50 (495) 11.75 (298) 20.75 (527) 3/8 19.75 (502) 0.63 (16) 42.00 (1067) 500 (227) 583 (264) 580 (263) 615 (279)
8 900 25.00 (635) 14.00 (356) 17.00 (432) 50.63 (1286) 23.06 (586) 30.75 (781) ½ 28.00 (711) 0.94 (24) 56.00 (1422) 1500 (682) 1800 (818) 1610 (732) 1670 (759)

* For water with clean, perforated basket

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