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Selection Factors for Solenoid Valves

Bear these factors in mind while selection solenoid valves Products, or fill out Application Condition & Requirement Form (Option Board)

  1. Output Requirements of Solenoid Valves
    1. Fluid Type:  Gas / Liquid, and its temperature, viscosity, corrosiveness, etc.
    2. Flow Rate: key performance index of valve,
    3. Pressure Difference: which is to be overcome by valve when close.
    4. Tightness: of the valve’s sealing performance, can be measured by leakage vs time unit, or by pressure drop of a sealed volume within limited time.
    5. Duty Cycle = (solenoid) On time /（On time＋Off time）〕X100%
    6. Maximum on time
      --Solenoid heats up while being energized. Duty cycle or maximum on time, and power of solenoid decide temperature rise of solenoid. --Temperature rise and ambient temperature decides selection of Insulation class.
      (Insulation Class=℃: A=105,  E=120,  B=130,  F=155,  H=180,  N=200,  C=220+)
  2. Input Conditions of Solenoid Valves
    1. Power Supply Mode & Power
      Input of different current wave shapes determines work mode of solenoid valves.. Actual applications may have: AC/DC (constant voltage / Current Supply, battery, dry cell, DC generator, capacitor), commutate and filer methods, voltage range and maximum current.
    2. Diode as Rectifier:
      If the power supply available for the solenoid is AC, a rectifier is required to convert it into DC. The rectifier should in principles be designed to be of full-wave rectification type. The rectifier elements should have a peak inverse voltage three times as high as the solenoid drive voltage
    3. Temperature Rise increases in proportion to current (power)
  3. Environment Factor & Life.
    1. Environment factors & expected life are critical for material and finish consideration.
    2. Environment factors include: temperature; humidity; magnetic or electric field; gas, liquid, dust pollutants or corrosives; impact or vibration, etc.
  4. Connections of Assembling, Power Supply and Load; and Size:
    1. Assembly methods: a). external bolt.   b). solenoid frame thread holes   c). Fitting in
    2. Power supply connection method:  a). Lead wire    b). Lead wire + connector   c). 187 quick connect terminals
    3. Load connection method.  refer Solenoid Valve Products or express your request
  5. Protection of Contacts in Driving Circuit.
    The control contacts for use with the DC Solenoid may spark, wear and cause noise interference. Provide a proper protection  as the case maybe.
    Resistor & Capacitor Method Diode Insertion Method
    Resisitor & Capacitor Method Circuit Drawing Diode Insertion Method Circuit Drawing