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Solenoid valve troubleshooting: the most common failure modes
The infographic below shows the top five failure modes of solenoid valves. Often, the malfunction of a solenoid valve can be attributed to easy to fix issues, such as dirt in the valve (80% of the cases). Another common issue is a too low differential pressure for indirect operated solenoid valves. These failure modes apply to all kinds of valves, such as 2 way valves, but also to 3 way valves.
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Complete the questions to find suitable valves directly:
The valve is actuated with an electric current through the solenoid (electromagnet).
- Switches directly.
- From 1/8 inch up to 2 inch.
- Normally Closed or Normally Open.
- Only for clean media.
- Uses energy as long as electrically energized.
- (Semi-)direct operated: from 0 bar pressure differential.
- Indirect operated: from ±0.5 bar pressure diff.
- Only one direction of pressure.
- Brass, Stainless Steel or Plastic housing.
- EPDM, FKM, NBR of PTFE seals.
The flow is controlled with a drilled sphere (ball) which rotates around its axis, perpendicular to the bore. The ball rotates with the help of an electric motor.
- Operates from 0 bar.
- Close gradually (±10s).
- Energy efficient.
- 1/2, 3/4 or 1 inch.
- For both flow directions.
- Brass Housing / PTFE sealing.
- Less sensitive to dirt.
NO = Normally Open: The valve is open when the coil is not electrically energized.
|1/8 inch||± 4 - 8 mm|
|1/4 inch||± 6 - 12 mm|
|3/8 inch||± 8 - 15 mm|
|1/2 inch||± 10 - 16 mm|
|3/4 inch||± 15 - 22 mm|
|1 inch||± 20 - 30 mm|
|1½ inch||± 25 - 50 mm|
|2 inch||± 40 - 60 mm|
3-Weg Electric Ball Valve (bore >8mm):For larger flow rates, such as central heating, irrigation, compressed air etc.