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PRESSURE SWITCHES

PRESSURE SWITCHES

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PRESSURE SWITCHES

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  1. PRESSURE SWITCHES UMER AFZAL 2007-CHEM-24

  2. SYNOPSIS • Introduction • Categories/Kinds of Pressure Switches • Purpose Built Pressure Switches • References

  3. INTRODUCTION • Definition • Working Principle • Construction

  4. CATEGORIES/KINDS OF PRESSURE SWITCHES • Manual vs. Automatic Pressure Switches • Hydraulic and Pneumatic Pressure Switches • Purpose Built Pressure Switches • Air Compressor Pressure Switches • Water Pump Pressure Switches • Vacuum Switches • Differential Pressure Switches • Extended Duty Pressure Switches • Extended Duty Vacuum Switches

  5. Air Compressor Pressure Switches • can be used for a pressure systems of 1-16 bar. TYPES: • Square D Air Compressor Pressure Switch • Air Pressure Switch for Single Stage Air Compressor • Air Pressure Switch for Dual Stage Air Compressor • Furnas Pressure Switch • Siemens-Furnace Pressure Switch • and many more

  6. Air Compressing System

  7. Water Pump Pressure Switches • used for the pressure ranges of 15-250 psi. • Cut-in and Cut-out Pressure • Limitations of Water Pump Pressure Switches

  8. Assembly of pumping system (submersible bore pump)

  9. Vacuum Switches • used for vacuum applications ranging from 1.1-22 inHg. • Applications Internal combustion engine (20 in. vacuum) Vacuum motors HVAC controls

  10. Differential Pressure Switches • 0.5 to 6 bar • mostly used in the power plants

  11. Extended Duty Pressure Switches • 0.5 to 150 psi Switch with Metri-pack terminal Switch with screw terminals

  12. Extended Duty Vacuum Switches • Fluorosiliconerubber diaphragm • About 1.1 to 22 inHg Vacuum switch with screw terminals

  13. REFERENCES • Singh S.K., “Industrial Instrumentation and Control”, Tata McGraw Hill Publishing Company Limited New Delhi, Edition Ist, Chapter 12, Page 393-394. • MAMCO Precision Switches 147 River Street Oneonta, NY 13820 • Lefoo Industrial Company Limited China • Solon Manufacturing Company • Hobbs Corporation, Springfield Illinois, USA