1 / 17

Solenoid Valves

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

jana
Download Presentation

Solenoid Valves

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SolenoidValves Blake Hunsaker ECE 5320 Mechatronics Assignment #1

  2. 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 • References • To Explore Further

  3. Definition • 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.

  4. Introduction: • 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.

  5. Magnetic effect of electric energy http://www.eduvinet.de/servitec/elekeep3.htm The possibility to convert electric energy in magnetic field energy is found in solenoid valves.

  6. 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)

  7. 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.)

  8. Valve Types • Popular types of on/off solenoid valves: • Direct-Lift • Pilot-Operated • Proportioning Valve

  9. 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. http://www.omega.com/techref/techprinc.html

  10. 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. http://www.omega.com/techref/techprinc.html

  11. 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.

  12. 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).

  13. Two-way Valves Three-way Valves Four-way Valves Five-way Valves Knife Gate Valves Abrasive Service Valves Bonnetless Bonneted Extended Flange Design Square Port Rectangular Port Thru Port Valve Porting Options

  14. 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.

  15. References • www.omega.com • www.eduvinet.de/servitec/elekeep3.htm • www.chemicalprocessing.com • www.theoldbuzzard.com

  16. To Explore Further • www.solenoid-valves.net • www.globalspec.com

  17. THE END Thank You

More Related