What are the common problems during operation and their solutions?
Laboratory emulsifiers may encounter minor issues during use—here are common problems, causes, and practical solutions:
a. Emulsification is Uneven (Grainy Texture, Oil-Water Separation)
Causes: Insufficient shear force (low speed), probe not fully submerged, uneven addition of dispersed phase, or inappropriate emulsification time.
Solutions: Increase the homogenization speed (within the device’s limit); ensure the probe is 2-3cm below the liquid surface; add the dispersed phase slowly and uniformly; extend emulsification time by 5-10 minutes; pre-dissolve solid ingredients completely.
b. Excessive Foaming/Bubbles in the Emulsion
Causes: Air suction (probe not submerged), high-speed stirring under atmospheric pressure, or volatile ingredients.
Solutions: Submerge the probe fully; reduce stirring speed initially when adding ingredients; use a vacuum emulsifier to remove bubbles; avoid mixing at high speed for extended periods.
c. Overheating of Materials or Device
Causes: Long emulsification time at high speed, lack of cooling (for heat-sensitive materials), or blocked ventilation of the motor.
Solutions: Reduce emulsification time or alternate between high and low speeds; use an emulsifier with a cooling jacket; pause operation to allow the motor to cool; ensure the device’s ventilation ports are unblocked.
d. Unusual Noises (Grinding, Squeaking)
Causes: Loose parts (rotor-stator, probe), worn bearings, or foreign objects in the emulsification vessel.
Solutions: Turn off the device immediately; check and tighten all parts; inspect for foreign objects (remove if found); replace worn bearings; contact technical support if noises persist.
e. Leakage (Vacuum Models)
Causes: Damaged seals, loose vessel lid, or insufficient vacuum level.
Solutions: Replace damaged O-rings/gaskets; tighten the vessel lid; check the vacuum pump for leaks; increase the vacuum level gradually (avoid sudden high pressure).
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