Valtek Severe Service Equipment

Valtek Severe Service EquipmentMegaStream PlatesIntroductionSimilar in many respects to a MegaStream trimattenuator, the MegaStream resistance plate(Figure 34) is installed downstream from a valveas an additional solution to control valve noise.MegaStream plates can be installed betweenraised face flanges or welded in-line. TypicalMegaStream plate applications include gas pressurereducing stations, gas vents and flare systems.MegaStream plates are designed for eachindividual application, providing sound pressurelevel (SPL) reductions of up to 15 dBA.DesignEach plate incorporates a series of stages (Figures 35 and 36).To control downstream line turbulence, each stage absorbs aportion of the pressure drop through its many multiple orifices.Depending on the type of gas and the pressure drop ratio, theseplates may require between one and four stages. StandardMegaStream plates are constructed from carbon steel for boththe housing and multi-hole stages. One additional option constructedfrom 304 stainless steel for both the housing andstages is available. Large plates are available with lifting lugs.Figure 34:Two-stage MegaStream PlateTable 14: MegaStream Plate C VANSI Class 150 - 600Size 1-stage 2-stage 3-stage1 1 /2 13 8 62 23 15 113 52 34 264 92 60 466 208 136 1048 371 243 18510 580 380 29012 835 547 41714 1136 774 56816 1484 972 74218 1879 1231 93920 2320 1520 116024 3340 2188 1670Figure 35: Two-stageMegaStream Plate(with drain)Figure 36:Three-stageMegaStream Plate(with lifting ring)NOTE: All values shown at maximum C Vper given size; reduced C Vvalues areavailable upon request. C Vdata determined with standard 0.19-inch diameterhole size; varying hole sizes will change the above values.26Flowserve Corporation, Valtek Control Products, Tel. USA 801 489 8611