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Maintenance Tips of Solenoid Valves

DAS Services Inc.

Solenoid Valves are immensely useful in industrial applications and hence they must be taken care of to buy them an increased lifespan. They  face problems of opening because of power failure, uneven pressure, wrong voltage, dirt under the diaphragm, missing components or a coil burnout. The problems should be minimized in order to locate the exact problem.

A cheat sheet to the nature of problems inhabiting solenoid valves:

  • Expel the solenoid valve from the line once liquid and power have been marginalized
  • Remove the top coil first, and afterward expel the guide tube – inside the cylinder there is a free plunger and spring.
  • Check both cylinder and plunger for strong particles at that point clean with dissolvable and compacted air. 
  • For pilot-operated valves, expel the valve chest screws and check the diaphragm for floating debris and foreign particles
  • Clean all parts inside the valve.
  • Once convinced that the parts are not harmed and the inside is perfect at that point reassemble the valve.

If there is a problem of stuck dirt in the chamber, you could install an inline filter in the upstream of the valve. However, if corrosion is present, you may not have the matching valve type for the industrial application. If both sediment and erosion are present, they cause the plunger to stick drawing more current from the coil causing it to fizzle out.  A regular maintenance schedule will help the solenoid valve from becoming pronounced with the problem and will enhance the lifespan of the solenoid. Now, solenoid valves never fully function without generating an audible hum that could point out to solenoid chatter and valve failure. It gives a noise that could be humming or buzzing noise, water hammer or an imperceptible clicking noise with pneumatic valve exhaust.

Buzzing Noise:

Solenoid Valves operate on AC current and on account could produce some buzzing sound accompanied by vibrations.

Low Voltage:

However if the noise emanating from the solenoid valve is unnatural, it could point to an improper control signal, bad wiring or faulty control signal.

Loose or Missing Parts:

Another reason for the unnatural sounds could be missing parts in the chassis.  It ought to be confirmed that all parts are as per the manual and that all segments are appropriately fixed. This issue can happen if the valve has been tampered with. In the event that a few parts are missing, you may locate a reasonable spare in your wholesaler's list.

Unnaturally high pressure differential or flow rate:

An unreasonable pressure  differential across  a solenoid valve, or a too high flow rate can cause tingling clamors in some valve types. Solenoid valves ought to be hand-picked with chosen pressure and flow necessities. Inlet and exhaust-fumes tubing ought to be of adequate width to take into consideration lower stream rates. A few solenoids require speed-control gadgets for appropriate activity.

Minimum differential pressure across the solenoid valve:

A minimum differential pressure should be maintained across the solenoid valve for it to open and remain in the open state. They are coined the name indirect operated, pilot operated or servo operated. The valve may not open in case the minimum pressure condition is not met. The valve may toggle between the open and closed positions.