Presentation on theme: "Vacuum Regulator Gas Feed Systems: Theory and Maintenance"— Presentation transcript:
1 Vacuum Regulator Gas Feed Systems: Theory and Maintenance Thom DiGeronimoOperatorSchool.ComAll Text, drawings and photographs Copyrighted 2005 by T DiGeronimo3/25/2017
2 Seminar Highlights Gases and Properties The Vacuum Regulator / Ejector Element theory and functionDifferences by manufacturersWork and safety practicesPersonnel & Equipment Safety3/25/2017
3 History of the Vacuum Regulator 1 Before 1960, when James Haskett, Chlorinators Inc. founder, designed and patented the cylinder-mounted all-vacuum-operated gas chlorinator, most chlorinators worked essentially the same way. Pressure from the tanks forced the gas through one line to an ``ejector“ where it was mixed with water. Water pressure then forced the chlorine/water solution through another line to the ``diffuser" that injected it into the water or wastewater being treated. If either line failed, gas would escape unimpeded. Failure of any of the many valves these systems employed would also cause gas to escape. Haskett's design -- mounting the chlorinator on the cylinder and using a vacuum to pull the gas to the ejector -- eliminated the gas pressure line. This design makes it very difficult for chlorine to escape. If any part of the equipment should fail, the flow of chlorine is immediately -- and automatically -- shut off. The problem of corrosion, which contributed to the difficulties of the pressure systems, is also significantly reduced by Mr. Haskett's design, and the pressure line, the most serious source of corrosion in gas chlorination equipment, is eliminated.
4 History of the Vacuum Regulator 2 In Mr. Haskett‘s design, chlorine gas bubbles immediately enter the main stream, and are quickly dissolved. Further, beginning with the regulator, the gas is never under pressure, and it is mixed with water in the ejector under vacuum conditions. Another important point: laws prohibiting the use of chlorine gas could be costing you a lot of money, because chlorine gas is far more economical than either sodium or calcium hypochlorite. The tank contains 100% chlorine, which can never lose strength. Calcium hypochlorite has only 65-70% total weight chlorine available, and sodium hypochlorite only 10% or less by the time it is used. You need 1.5 pounds of calcium hypochlorite, or 1.2 gallons of sodium hypochlorite (average 10%) to equal a pound of liquid (gas) chlorine. Both calcium and sodium hypochlorite lose strength in storage. Although the initial cost of gas chlorination equipment may be higher than that required for calcium or sodium hypochlorite, the savings in material costs quickly make up the difference.3/25/2017
19 Proper Materials used Properly Body PlasticsMetals / HardwareO rings / GasketsTubingPipingValvesSafety & Function3/25/2017
20 Basic Vacuum Regulator Body Two Parts Separated by a DiaphragmFront is Vent CavityBack is Vacuum RegulationInlet Valve Mounting3/25/2017
21 Vacuum Regulator Diaphragm Flexured Plastic Material Separates Body CavitiesFront has pin for Indication and ControlBack has Vent ValveCan be Spring Loaded to Inlet ValveUses Vacuum / Barometric Pressure to Open Inlet Valve3/25/2017
51 Cleaning Materials Dish Soap & Water Alcohol on MOST Plastics Lacquer Thinner on Teflon & Metals SoakingLacquer Thinner “Flash” Wipe on Plastics *** Caution – This WILL Melt Plastics ***Vinegar or Muriatic Acid for Corrosion Removal3-M Pads for Plastic Abrasion“00 – Fine” Steel Wool for Metal Abrasion3/25/2017
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