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Solenoid Valves. Blake Hunsaker ECE 5320 Mechatronics Assignment #1. Outline. Definition Introduction Selecting a Solenoid Valve Valve Types Direct-Lift Pilot-Operated Proportioning Valve Ratings for Solenoid Valves Valve Porting Options Final Considerations in Valve Selection

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solenoid valves


Blake Hunsaker

ECE 5320


Assignment #1

  • Definition
  • Introduction
  • Selecting a Solenoid Valve
  • Valve Types
    • Direct-Lift
    • Pilot-Operated
    • Proportioning Valve
  • Ratings for Solenoid Valves
  • Valve Porting Options
  • Final Considerations in Valve Selection
  • References
  • To Explore Further
  • A valve is a mechanical device for controlling the flow of a fluid or a substance.
  • A solenoid is a coil of wire that becomes magnetized when electricity is run through it.
  • Solenoid valves use electricity to open and close an orifice in the valve body, allowing or preventing the flow of a given medium.
  • This type of valve is opened and closed by a plunger that is raised and lowered by the energizing and de-energizing of a solenoid.
  • A solenoid valve uses a solenoid to actuate a valve. This lets you control the flow of water, air, or other substances with electricity.
magnetic effect of electric energy
Magnetic effect of electric energy

The possibility to convert electric energy in magnetic field energy is found in solenoid valves.

selecting a solenoid valve slide a
Selecting a Solenoid Valve(Slide A)
  • Valve type (two-, three- or four-way)
  • Voltage
  • Pressure
  • Medium handled
  • Materials (stainless steel, brass, plastic or other material)
  • Port size fluid connection
  • De-energized position (normally open or closed, ect.)
  • Ambient conditions
  • Approval(s) required (UL, CSA, FM, CENELEC)
selecting a solenoid valve slide b
Selecting a Solenoid Valve(Slide B)
  • Coil/connection type
  • Current draw limitations
  • Duty cycle (continuous or intermittent)
  • Electrical enclosure type
  • Life expectancy (minimum expected cycles per year)
  • Maximum and minimum operating pressure differentials
  • Orifice diameter
  • Allowable internal leakage
  • Ratings (NEMA 4, 7, 9, etc.)
valve types
Valve Types
  • Popular types of on/off solenoid valves:
    • Direct-Lift
    • Pilot-Operated
    • Proportioning Valve
direct lift
  • A direct-lift solenoid valve has a plunger that opens or closes the valve.
  • Direct-lift solenoid valves usually have low flow rates and high differential pressure drops.
  • They normally have a quicker response than pilot-operated valves.

pilot operated
  • Pilot-operated solenoid valves use the fluid's own pressure for actuation.
  • The valves are either piston or diaphragm types and usually require a differential pressure to keep the valve closed.
  • Because they do not have a plunger, pilot-operated solenoid valves are normally available in larger orifice sizes than direct-lift valves.
  • Pilot-operated solenoid valves have quick response time and low cost.

proportioning valve
Proportioning Valve
  • Proportioning valves allow complete and continuous fluid control.
  • An analog signal is sent to the valve for a full range of valve positions.
ratings for solenoid valves
Ratings for Solenoid Valves
  • General service (for working with common fluids).
  • Cryogenic fluids (for fluids such as liquid oxygen, liquid argon and liquid nitrogen).
  • Vacuum (for working in and maintaining vacuum conditions).
  • Oxygen service (designed to provide contamination-free flow of oxygen).
valve porting options
Two-way Valves

Three-way Valves

Four-way Valves

Five-way Valves

Knife Gate Valves

Abrasive Service Valves



Extended Flange Design

Square Port

Rectangular Port

Thru Port

Valve Porting Options
final considerations in valve selection
Final Considerations in Valve Selection
  • Valve response time
  • Control fidelity
  • Material
  • Size
  • Temperature/pressure ranges
  • The signal is, for on/off valves, 120VAC, 12VDC or 24VDC
  • For a proportioning valve, either a 0–10 V signal or a 4-20mA signal is used.
to explore further
To Explore Further
the end


Thank You