Applicable Models: SZLKTE Piezoelectric Micro Dispensing Valves MJ922-P, MJ922-P-AN Series

1. Cleaning Precautions

Power Off Before Cleaning

• Be sure to turn off the power and disconnect the air supply before cleaning, and only proceed once the valve has cooled to room temperature.

• Never clean while the device is powered on or under pressure, to avoid electric shock or fluid spray hazards.

a) External Valve Body Cleaning

• Wipe the valve body surface with a lint-free cloth dampened with isopropyl alcohol or deionized water.

• Do not use corrosive, flammable, or abrasive cleaning agents.

b) Nozzle Cleaning

• For clogged nozzles, soak them in a dedicated cleaning solution (such as acetone or isopropyl alcohol) for 5–10 minutes, then blow dry with a high-pressure air gun.

• Never use metal needles or hard tools to probe the nozzle, as this may damage the internal structure.

c) Piezoelectric Ceramic Protection

• Prevent liquids or dust from entering the gaps of the piezoelectric actuator.

• If the surface of the piezoelectric ceramic becomes contaminated, gently blow it dry with compressed air.

2. Routine Maintenance

a) Regular Inspections

• Inspect nozzle wear and seal aging weekly, replacing worn parts promptly.

• Test the voltage stability of the piezoelectric actuator monthly to ensure dispensing accuracy.

b) Lubrication and Sealing

• Use only lubricants recommended by the manufacturer, applying small amounts to moving parts (such as the valve stem).

• Replace seals every 3–6 months to prevent glue solidification and leakage.

c) Fluid Compatibility

• Ensure that the dispensing material is compatible with the valve body material (such as stainless steel or ceramic) to avoid chemical corrosion.

• When changing glue types, thoroughly clean the flow path to prevent cross-contamination.

3. Maintenance and Storage

a) Long-Term Storage

• Before storage, thoroughly rinse the flow path with cleaning solution and blow dry with compressed air to remove any residual liquid.

• If necessary, disassemble the unit and place it in an anti-static bag, storing it in a dry, dust-free environment.

b) Moisture and Shock Protection

• Piezoelectric components are sensitive to humidity; maintain relative humidity below 60% during storage.

• Avoid severe impacts during handling to prevent damage to the piezoelectric ceramic.

c) Professional Calibration

• Every six months or after maintenance, have professionals calibrate the dispensing parameters (such as frequency and voltage).

• It is recommended to keep a maintenance log recording changes in valve performance.

4. Safety Warnings

• Do not disassemble the piezoelectric ceramic module without authorization. High-voltage operation may cause serious injury.

• Discarded valves must be disposed of according to electronic waste regulations to avoid environmental pollution.