How is a solenoid valve controlled?

How is a solenoid valve controlled?

Solenoid valves are control units which, when electrically energized or de-energized, either shut off or allow fluid flow. The actuator takes the form of an electromagnet. When energized, a magnetic field builds up which pulls a plunger or pivoted armature against the action of a spring.

Why do solenoids usually fail?

When a solenoid is first energized, its coil receives a pulse of high inrush current that decreases as the plunger closes. If the plunger does not close, the high inrush current continues, which can cause the coil to overheat and burn out. This is the most common cause of solenoid failure and spotting it is easy.

How to identify an ASCO solenoid valve?

ASCO valves have a solenoid mounted directly on the valve body. When the solenoid is energized in a direct acting valve, the core directly opens the orifice of a Normally Closed valve or closes the orifice of a Normally Open valve. When de-energized, a spring returns the valve to its original position.

How does an ASCO solenoid valve work?

In terms of industrial applications, well, Asco solenoid valves utilize solenoids to open and close themselves. Essentially, the solenoid is placed in such a position that it’s the only thing keeping the pressure in the mid-chamber of the valve sufficiently high to hold closed the diaphragm sealing the valve’s inlet from that mid-chamber.

How to troubleshoot an ASCO solenoid valve?

Disassemble valve,remove extraneous matter,and clean parts in a mild soap and water solution.

  • Examine diaphragm sealing surface for dirt. Remove all foreign particles. Examine orifice for nicks. Damaged parts must be repaired or replaced.
  • Check plunger return spring. Replace if broken.
  • What are the parts of a solenoid?

    Retaining clip (a.k.a. coil clip)

  • Solenoid coil (with magnetic return path)
  • Core tube (a.k.a. armature tube,plunger tube,solenoid valve tube,sleeve,guide assembly)
  • Plugnut (a.k.a. fixed core)
  • Shading coil (a.k.a. shading ring)
  • Core spring (a.k.a. counter spring)
  • Core (a.k.a. plunger,armature)