Simply Better The PROVALVE > ή valve tray by Koch-Glitschcombines the best features of movingvalve trays and fixed valve trays.Theresult: A reliable, long-lasting tray thatsimply works better.The key to the PROVALVE tray is itsunique valve design.The tapered valve cover imparts a forward-lateral push to the liquid across the tray,improving liquid distribution while at the same time pro- tecting the tray deck from fouling.The sheltered valve design also provides greater open area and better turndown than conventional sieve trays. > Process Advantages ΕImproved capacity over sieve or valvetraysLower pressure drop than sieve orvalve traysՕTurndown equal to typical movingvalve traysEqual or better efficiency than conventional valve trays Direction of Liquid Flow Mechanical Advantages ՕReliable,low-maintenance designExcellent fouling resistance ՕStructural integrity Improved surge protection ՕEasy and economical installation The PROVALVE tray offers the wide operating range of conventional valve traysbut with no moving parts.The valve design prevents the likelihood of valve leg or deck wear while eliminating the poten- tial for popped, fouled or stuck valves.Unlike fixed valves punched from thedeck, the PROVALVE fixed valve features auniquely tapered cover that shelters each vapor opening to effectively suppress weeping,providing the high turndown capability of the PROVALVE tray. The proprietary cover also allows a larger orifice size than is feasible on conventional sieve trays or a given set of process aconditionsŗa distinction which promotes lower presssure drop and protects against vapor surges.The cover,which extends beyond theorifice,deflects and directs the vapor to a greater degree than do moving valves or other punched-from-the-deck valves.This phenomenon yields a low,even spray height across the deck,suppressing jet flooding and permitting operation at greater vapor rates. >