Suction Diffusers

The Bell & Gossett Suction Diffuser is an angle pattern flow straightening fitting that combines a diffuser-strainer orifice cylinder and full length straightening vanes to provide ideal flow conditions for the pump suction. It saves space and money by eliminating the need for long or short radius elbows, reducing flanges, and long lengths of pipe leading into the suction side of the pump. Its full length straightening vanes help provide a fully uniform flow pattern into the pump, reducing uneven stress on the pump impeller and shaft and extending the life of the pump.

B&G Suction Diffusers are available in a wide range of sizes, from 2”x1½” to 10”x10”. Users can select from a choice of steel or stainless steel orifice cylinder and straightening vanes, and models are available with flange, groove, and NPT (up to 3”x3”) end connections. All Suction Diffusers are suitable for up to 250F max temperature. Flanged and NPT models are rated for 175 psig max working pressure, while grooved models are suitable for 300 psig max working pressure.


Features and Benefits

Saves space and money

  • Eliminates the need for elbows, reducing flanges, and long lengths of pipe
  • Fewer components to install, reducing installation time

Provides fully developed flow into the pump suction

  • Full length straightening vanes ensure uniform flow profile
  • Large perforations in orifice cylinder help reduce pressure drop

Wide range of sizes, connections, and options

  • Sizes from 2”x1½” to 10”x10”
  • Flange, groove, and NPT end connections
  • Steel or stainless steel internals
  • 175 psig or 300 psig working pressures