Valtek Severe Service Equipment

Valtek Severe Service EquipmentMegaStream DiffusersIntroductionAs with the MegaStream plate, the MegaStream diffuser(Figure 37) can also be used in series with anystyle of valve to reduce the sound pressure level (up to15 dBA), while eliminating the need for expensive valvetrim. MegaStream diffusers share high pressure dropswith the control valve, yet control the sound pressurelevel by passing the flow through many small openingsto eliminate excessive turbulence and energy.Available ModelsTwo standard diffuser models are available:GDS: Flowserve’s standard model with installation betweenthe raised face flanges of the valve and lineGDI: Similar to GDS with welded in-line installation orto mating flanges; outlet is enlarged to eliminatea reducer.DesignCorrect hole size and spacing are critical in determiningthe performance characteristics of the diffuser, Flowservecustom-engineers each diffuser for a particular application.By design, the length of the diffuser and the numberof holes vary to accommodate the flow capacity required.Thus, the capacity of the diffuser is significantlygreater than the MegaStream plate.Table 16: MegaStreamDiffuser SpecificationsBody Style Flangeless wafer, outlet head(weld or flange connection),open shell (vent)Inlet Size 1-42 inch (larger sizes availableupon request)ANSI Rating 150, 300, 600, 900, 1500, 2500Flow Direction One-way onlyMaterials ofConstructionCarbon steel (standard),stainless steel and other materialsavailable as requiredFigure 37: GDS MegaStream Diffuser28Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611