Bell & Gossett suction diffusers are 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. Suction diffusers are available in sizes from 1-1/2'' to 10'' in NPT, flanged, and grooved connections. They are available in pressures up to 175 psi. These suction diffusers come standard in cast iron bodies with steel straightening vanes, orifice cylinders, and bronze strainers. Stainless steel straightening vanes and orifice cylinder are optional.