Ultrapure Water System Solenoid Valve Malfunctions and Solutions

Solenoid valves in ultrapure water systems can malfunction due to factors such as water quality, operating pressure, and operating frequency. As a manufacturing and service-oriented enterprise, it's essential to understand how to troubleshoot product malfunctions, analyze their causes, and resolve them. This requires us to have a grasp of solenoid valve malfunction patterns and optimal handling methods. The following is a summary of common faults and their troubleshooting methods:

Fault 1: Solenoid valve does not work when energized. Troubleshooting:

1. Check for poor contact in the power cord – try rewiring and reconnecting the connectors;

2. Check if the power supply voltage is within the operating range – adjust to the normal range;

3. Check if the coil is detached from the solder – detached coils need to be re-soldered;

4. Check if the coil is short-circuited – replace the coil immediately if short-circuited;

5. Check if the operating pressure differential is inappropriate – adjust the pressure differential or replace with a suitable solenoid valve;

6. Check if the water temperature is too high – replace with a suitable solenoid valve;

7. Check if there are impurities in the water causing the main valve core and moving iron core of the solenoid valve to jam – first clean them, replace any damaged seals, and install a filter before the solenoid valve;

8. Due to excessive usage frequency or reaching the lifespan limit of the solenoid valve – the product needs to be replaced.

Fault 2: Solenoid Valve Cannot Close - Troubleshooting

1. Damaged seals on the main valve core or moving iron core – Replace the seals;

2. Water temperature or viscosity too high – Replace with a compatible solenoid valve;

3. Impurities have entered the main valve core or moving iron core – Clean;

4. Spring deformed or expired – Replace the product;

5. Clogged throttling orifice or balance orifice – Clean promptly;

6. Operating frequency too high or expired – Replace the product.

Other Faults and Troubleshooting:

1. Internal leakage: Check for damaged seals and improper spring assembly;

2. External leakage: Loose connections or damaged seals – Reconnect or replace seals;

3. Noise when powered on: Loose fasteners on the valve body – Tighten; Voltage fluctuations outside the allowable range – Adjust the voltage; Impurities or unevenness on the iron core contact surface – Clean or replace promptly.

Solenoid valve malfunctions primarily stem from unclear descriptions of operating conditions, discrepancies between the working pressure differential and the actual pressure, or temperature inconsistencies. Therefore, accurate selection and troubleshooting are crucial for the proper use of solenoid valves. Only by clearly understanding the working principles and characteristics of different solenoid valves can one better select the appropriate one; only by mastering the causes of solenoid valve malfunctions and their solutions can one better serve production and customers. Solenoid valves are of paramount importance in pure water/ultrapure water systems and deserve our utmost attention.