Vacuum Regulator Gas Feed Systems: Theory and Maintenance

Report
Vacuum Regulator Gas Feed Systems:
Theory and Maintenance
Thom DiGeronimo
www.OperatorSchool.com
Thom @ OperatorSchool.Com
All Text, drawings and photographs Copyrighted 2005 by T DiGeronimo
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Seminar Highlights
Gases and Properties
 The Vacuum Regulator / Ejector
 Element theory and function
 Differences by manufacturers
 Work and safety practices
 Personnel & Equipment Safety
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Chlorine Gas Properties
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Amber Gas & Liquid
Expands 460 Times
Corrosive
Non Flammable
Poisonous @ 3PPM
Heavy Gas Will Flow
Chlorine Institute
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Sulphur Dioxide Gas Properties
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Gas & Liquid
Expands many Times
Corrosive
Non Flammable
Poisonous @ 3PPM
Heavy Gas will Flow
CGA makes rules
Overfilled Tanks can explode !!!
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Liquid to Gas Properties
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Coefficient of expansion
Needs minimum headroom
With a FULL TANK
Liquid expansion at
any temperature can
cause the tank to
fail or explode !!
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Historic Chlorination
Wallace & Tiernan
“ Old Number 1”
Circa 1913
Pressure Regulator
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Proper Materials used Properly
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Metals / Inlet-Screws-Yoke
Body & Inlet Plastics
O rings
Tubing
Piping
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Superior
Vacuum
Regulators
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Ejector Designs
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ABS Body – Viton Gaskets & O Rings
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Ejector Sizing Charts
Proper Inlet & Outlet Pressures
 Proper Installation / Position
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Vacuum Regulator
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Two Parts Separated by a Diaphragm
Front is Vent Cavity
Back is Vacuum Regulation
Inlet Valve Mounting
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Vacuum Regulator Diaphragm & Bolt
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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
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Vacuum Regulator Diaphragm
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Flexured Plastic Material Separates Body Cavities
Uses Vacuum / Barometric Pressure to Open Inlet Valve
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Inlet Valve Assembly
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Grooved Body Alumina Bronze ( Better: Hastalloy C)
Guts Teflon, Monel ABS / PVC
Gaskets / O Rings Viton or Buna N
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Inlet Valve Detail
Vent Seat
Vent Plug
Valve Spring Assy
Inlet Seat
Inlet Plug
Inlet Filter
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Inlet Valve Detail
Valve Spring
Assembly
Inlet Seat
Inlet Plug
Inlet Filter
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Inlet Valve w/ Diaphragm Detail
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Inlet Valve w/ Diaphragm Detail - Leak
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Standard Hydro Regulator
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Flowmetering w/ Ecometrics @ 500 PPD
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Rotameter
Metering Valve
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Maintenance problems 1
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Maintenance problems 2
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Auto-Switchover Valve
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Latch – Switchover Detail 1
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Latch – Switchover Detail 2
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Tank Valves & Fusible Plugs for Ton’s
Fusible Plugs on Both
Ends of Cylinders
w/ Cover
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– Gas / Liquid Valves – Eductor tubes
<< Liquid – Gas >>
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Tank Connections w/ Flex’s
Wrong way traps condensing liquid
Right way drains it back to tank.
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Valves & Accessories
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Safety “Equipment” Required
SCBA
Gas Leak Detector
Leak Repair Kit A or B
Properly Trained Haz-Mat People
A PLAN
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Approved 150 lb Cylinder Storage
Straps & Blocks - NO CHAINS - Straps & Rack
Valve Covers on When NOT Being Used
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Un-Approved
150 lb Cylinder Capture
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Yoke & Inlet Valve Assembly
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Mounts the Regulator
Inlet Valve Seals to Bottle
Lead Washer Gasket
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Yoke & Inlet
Valve
Assembly
Leak
Testing
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Ejector Application by Diffuser
Must Not Back Up Flow
Must “Diffuse” the Solution in Flowstream
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Typical Systems 1 -- Capital Controls
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Typical Systems 2 -- Capital Controls
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Typical Chlorine – Sulfur Dioxide Room
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Service Systems 1
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Service Systems 2
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Where to Get More Information
Chlorine Institute
 A.W.W.A. Manuals
 Manufacturers Manuals
 www.OperatorSchool.com
 www.Start-UpService.com
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