10/12/ Vacuum Regulator Gas Feed Systems: Theory and Maintenance Thom DiGeronimo OperatorSchool.Com All Text, drawings and photographs Copyrighted 2005 by T DiGeronimo

10/12/ Seminar Highlights Gases and Properties The Vacuum Regulator / Ejector Element theory and function Differences by manufacturers Work and safety practices Personnel & Equipment Safety

10/12/ Chlorine Gas Properties Amber Gas & Liquid Expands 460 Times Corrosive Non Flammable 3PPM Heavy Gas Will Flow Chlorine Institute

10/12/ Sulphur Dioxide Gas Properties Gas & Liquid Expands many Times Corrosive Non Flammable 3PPM Heavy Gas will Flow CGA makes rules Overfilled Tanks can explode !!!

10/12/ Liquid to Gas Properties Coefficient of expansion Needs minimum headroom With a FULL TANK Liquid expansion at any temperature can cause the tank to fail or explode !!

10/12/ Historic Chlorination Wallace & Tiernan “ Old Number 1” Circa 1913 Pressure Regulator

10/12/ Proper Materials used Properly Metals / Inlet-Screws-Yoke Body & Inlet Plastics O rings Tubing Piping

8 Superior Vacuum Regulators

10/12/ Vacuum Regulator Two Parts Separated by a Diaphragm Front is Vent Cavity Back is Vacuum Regulation Inlet Valve Mounting

10/12/ Vacuum Regulator Diaphragm & Bolt Flexured Plastic Material Separates Body Cavities Front has pin for Indication and Control Back has Vent Valve Can be Spring Loaded to Inlet Valve Uses Vacuum / Barometric Pressure to Open Inlet Valve

10/12/ Vacuum Regulator Diaphragm Flexured Plastic Material Separates Body Cavities Uses Vacuum / Barometric Pressure to Open Inlet Valve

10/12/ Inlet Valve Assembly Grooved Body Alumina Bronze ( Better: Hastalloy C) Guts Teflon, Monel ABS / PVC Gaskets / O Rings Viton or Buna N

10/12/ Inlet Valve Detail Vent Seat Vent Plug Valve Spring Assy Inlet Seat Inlet Plug Inlet Filter

10/12/ Inlet Valve Detail Valve Spring Assembly Inlet Seat Inlet Plug Inlet Filter

10/12/ Inlet Valve w/ Diaphragm Detail

10/12/ Inlet Valve w/ Diaphragm Detail - Leak

10/12/ Standard Hydro Regulator

10/12/ Flowmetering w/ 500 PPD Rotameter Metering Valve

10/12/ Maintenance problems 1

10/12/ Maintenance problems 2

10/12/ Auto-Switchover Valve

10/12/ Latch – Switchover Detail 1

10/12/ Latch – Switchover Detail 2

10/12/ Ejector Designs ABS Body – Viton Gaskets & O Rings

10/12/ Ejector Sizing Charts Proper Inlet & Outlet Pressures Proper Installation / Position

10/12/ Tank Valves & Fusible Plugs for Ton’s Fusible Plugs on Both Ends of Cylinders w/ Cover – Gas / Liquid Valves – Eductor tubes >

10/12/ Tank Connections w/ Flex’s Wrong way traps condensing liquid Right way drains it back to tank.

10/12/ Valves & Accessories

10/12/ Safety “Equipment” Required SCBA Gas Leak Detector Leak Repair Kit A or B Properly Trained Haz-Mat People A PLAN

10/12/ Approved 150 lb Cylinder Storage Straps & Blocks - NO CHAINS - Straps & Rack Valve Covers on When NOT Being Used

10/12/ Un-Approved 150 lb Cylinder Capture

10/12/ Yoke & Inlet Valve Assembly Mounts the Regulator Inlet Valve Seals to Bottle Lead Washer Gasket

33 Yoke & Inlet Valve Assembly Leak Testing

10/12/ Ejector Application by Diffuser Must Not Back Up Flow Must “Diffuse” the Solution in Flowstream

10/12/ Typical Systems 1 -- Capital Controls

10/12/ Typical Systems 2 -- Capital Controls

10/12/ Typical Chlorine – Sulfur Dioxide Room

10/12/ Service Systems

10/12/ Service Systems

10/12/ Where to Get More Information Chlorine Institute A.W.W.A. Manuals Manufacturers Manuals