Metalworking-fluid buyers often ask whether a defoamer will remove foam without leaving haze, oil spots or filtration trouble in the coolant system. JY-323 Metalworking Fluid Defoamer is documented by Juyou as a multi-component, water-dispersible defoamer for metal cutting fluids and polishing liquids. Before a plant switches to a new lot or replaces an incumbent defoamer, the useful procurement question is not only whether foam drops quickly, but whether coolant compatibility records are complete enough for production approval.
Confirm the system before judging foam control
The public Juyou product page describes JY-323 as nonionic, off-white translucent liquid, easy to disperse in water, and intended for foam control across a range of pH values and temperatures. It also lists metal cutting fluids, polishing liquids, industrial cleaning, textile processing, electroplating and wastewater treatment among possible uses. That breadth is useful, but it means the buyer should define the actual coolant system before accepting a sample result.
Record whether the trial fluid is a soluble oil, semi-synthetic or fully synthetic coolant, and note concentration, water hardness, tramp oil level, filtration method, biocide package and current foam complaint. A benchtop shake test is a screening step; it is not enough to approve a circulating sump.
Compatibility records to request
| Record | Why it matters |
|---|---|
| Clarity or haze after dilution | Confirms that foam control does not create visible separation in the coolant concentration being used. |
| Foam knockdown and recurrence | Separates immediate foam collapse from longer suppression during pumping, spraying and return flow. |
| Filtration and residue check | Helps identify deposits on paper filters, screens, nozzles or tank surfaces. |
| Workpiece surface observation | Looks for oil spots, staining, paint or downstream cleaning concerns after the defoamer is added. |
Trial plan for procurement teams
- Use the buyer’s actual coolant concentrate and plant water, not only a laboratory reference fluid.
- Test a low, medium and high addition level recommended by Juyou technical support, then document foam height, collapse time and recurrence after agitation.
- Run an extended circulation or side-stream check when possible, because shear stability and residue behavior can differ from a jar test.
- Hold the treated fluid and untreated control side by side so odor, haze, creaming and sediment can be reviewed after storage.
What to include in the RFQ
For a useful quotation, provide the coolant type, working concentration, operating temperature, water hardness, current foam source, target addition range, annual volume, packaging preference, destination port and the documents required for approval. Ask for the current TDS and SDS for the exact grade and lot. Do not treat an old compatibility note from another coolant family as evidence for a new system.
Frequently asked questions
Can JY-323 be approved only from a fast foam knockdown test?
No. Fast foam reduction is important, but procurement should also review clarity, filtration, residue and workpiece observations under the buyer’s actual coolant conditions.
Does this article certify JY-323 for every metalworking fluid?
No. It summarizes procurement checks based on the accessible Juyou product source. Final acceptance depends on current grade documents and a trial in the specific coolant system.
Related source and inquiry
Product identity source: JY-323 Metalworking Fluid Defoamer, publicly checked on 2026-09-18. For samples or technical confirmation, send coolant details through the Juyou inquiry form, email info@juyousilicone.com, call +86 139 1581 4735, or use Juyou WhatsApp.