What problems can corrosion or material aging cause in solenoid valves?

1. Corrosion of Solenoid Valve and Metal Components

Shell Corrosion: Moisture buildup or prolonged exposure to high humidity can cause corrosion of the metal casing, leading to reduced valve strength and leaks (water or air).

Internal Channel Corrosion: Corrosion of the valve core and channel walls in the fluid can create uneven flow resistance, affecting the valve's opening/closing speed.

Loose Connections: Corrosion can cause threaded joints to lose their tightening force, leading to leaks or loosening under vibration.

2. Aging and Performance Degradation of the Electromagnetic Coil

Coil Insulation Aging: Prolonged energization or high-temperature operation can cause the coil insulation material to age and become brittle, resulting in short circuits or open circuits.

Decreased Magnetic Force: Heat or aging of the coil reduces magnetic flux density, leading to insufficient driving force and preventing the valve core from completing its displacement within the specified time.

Coil Burnout: Voltage fluctuations or overloads can cause the coil to overheat, eventually burning out and causing the valve to lose its electromagnetic control function.

3. Aging and Failure of Seals (Elastomers)

Elastomer Hardening: Rubber or polyurethane seals harden, crack, and lose elasticity after prolonged use, resulting in a poor seal.

Chemical Corrosion: Acids, alkalis, or solvents in the medium corrode the sealing material, causing expansion or swelling and creating leakage channels.

Wear and Tearing: Frequent reciprocating motion of the valve core causes wear on the seals; failure to replace them promptly can lead to leakage or noise.

4. Mechanical Jamming and Structural Deformation

Valve Core Jamming: Corrosion products or residual magnetism can adhere between the valve core and seat, causing the valve core to "freeze" and prevent normal movement when energized.

Spring Failure: Springs lose elasticity due to fatigue or corrosion, causing the valve to fail to close or open reliably after power is cut off.

Structural Collapse: Decreased material strength leads to deformation of the valve body or internal supports, resulting in leakage or overall failure.

5. Impact on the Overall Operation of the Irrigation System

System Pressure Fluctuations: Valve leakage or incomplete closure causes unstable downstream pressure, affecting the uniform water output from the sprinklers.

Increased energy consumption: Decreased coil efficiency requires higher voltage or longer energizing time, leading to increased energy consumption.

Increased maintenance costs: Frequent replacement of corroded parts or repairs increase operating costs.