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Solenoid Valve Introduction

Solenoid Valve Introduction. Pilot Operated. Fs = p . A (N) Fs = Solenoid Pull-force (N) p = Pressure (Pa) (10 5 Pa = 1 bar) A = Orifice area (m 2 ). 2/2 Solenoid Operated Series 210. Centered pilot. Off - centered pilot. VALVE COMPONENTS. OPERATOR VALVE BODY RESILIENTS.

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Solenoid Valve Introduction

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  1. Solenoid Valve Introduction

  2. Pilot Operated Fs = p . A (N) Fs = Solenoid Pull-force (N) p = Pressure (Pa) (105 Pa = 1 bar) A = Orifice area (m2) 2 - File Name - 15/06/2012

  3. 2/2 Solenoid Operated Series 210 Centered pilot Off - centered pilot 3

  4. VALVE COMPONENTS • OPERATOR • VALVE BODY • RESILIENTS

  5. Coil Composition A coil, whether AC or DC, is simply turns of magnet wire on a bobbin, encapsulated to electrical insulation 5 - File Name - 15/06/2012

  6. Coils Cross Section/Copper Package 6 - File Name - 15/06/2012

  7. Magnetism & Solenoid Technology 7 - File Name - 15/06/2012

  8. Magnetic Field When a current is passed through the coiled wire, the electric current generates a magnetic field that causes the magnetic atoms within the iron domains to align. Eventually, the iron reaches its point of maximum magnetism, or saturation, and generates a strong magnetic field. Air core = weak magnetic field Iron core = strong magnetic field 8 - File Name - 15/06/2012

  9. S S N N Induced Currents Michael Faraday proved a changing magnetic field induces an electric current in a wire 9 - File Name - 15/06/2012

  10. Inductance 10 - File Name - 15/06/2012

  11. Electrical Energy to Mechanical Force 11 - File Name - 15/06/2012

  12. AC Solenoids General 15/06/2012

  13. AC Solenoids Inrush and Holding 15/06/2012

  14. DC Solenoids General 15/06/2012

  15. AC Sine Wave A waveform is a representation of how alternating current (AC) varies with time. The most familiar AC waveform is the sine wave, which derives its name from the fact that the current or voltage varies with the sine of the elapsed time. 15 - File Name - 15/06/2012

  16. Current falls to zero 50 Cycle Chatter 16 - File Name - 15/06/2012

  17. Magnetic field induces current in shading coil Low shading coil current provides just enough magnetism to hold the core closed when applied current magnetism is at zero 15/06/2012

  18. Shading Coil for AC Constructions 18 - File Name - 15/06/2012

  19. Shape and Composition of Metal Components AC SBSA DC SBSA Solenoid Base Sub Assembly 19 - File Name - 15/06/2012

  20. Permeability of core & plugnut material Air gap Shape and composition of metal components designed to focus the magnetic field Temperature Factors affecting solenoid performance 20 - File Name - 15/06/2012

  21. Function Breaker Piece Breaker piece 21 - File Name - 15/06/2012

  22. DC Operators Advantages/Disadvantages 22 - File Name - 15/06/2012

  23. AC Operators Advantages/Disadvantages 23 - File Name - 15/06/2012

  24. Coils High class isolation bobbin : 280°C Copper wire with high grade isolation lacquer: ASCO F-coils use N-wire (200°C) ASCO H-coils use double isolation layer. • Coil embedded in Epoxy: • Excellent isolator • Excellent protection against water 24 - File Name - 15/06/2012

  25. 25 - File Name - 15/06/2012

  26. General Solenoid valve design How do we find the best solution for the customer ?

  27. TOMSPAVE • T = TYPE • O = OPERATION • M = MEDIUM • S = SIZE, ORIFICE • P = PRESSURE • A = AMBIENT, FLUID • V = VOLTAGE • E = EXTRA’S, ENCLOSURES

  28. 2/2 Solenoid Valves 28

  29. Different valve types Hung diaphragm Floating diaphragm Core disc Basic designs for 2- , 3- , and partly 4- and 5-way constructions

  30. Different valve types • Piston • High pressure • Steam application • Lever • 3/2 steam and light oil • Slide disc • Low pressure steam

  31. 3/2-5/2 Solenoid Valves 31

  32. Different valve types • Poppet • Heavy duty applications • Less sensitive for dust • More expensive design • Spool • Compact 5/2 design • Cheaper design

  33. HOW TO SELECT THE RIGHT VALVE ? Over 3.000 types of standard valves and more than 20.000 specials The right valve for almost every application; strong and flexible in customer specials.

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