Medical coating machines play a critical role in manufacturing precision medical devices—from catheter surfaces to implant coatings—where uniform, contaminant-free coatings are vital for patient safety. The pneumatic diaphragm pumps powering these machines face unique demands: they must handle repeated low-pressure starts (often below 2 bar) to ensure steady coating material flow, and operate with ultra-low noise to comply with cleanroom and workplace environment standards. For one medical device manufacturer, meeting these requirements meant replacing their existing pump solution with BSK’s high-performance alternative.
Customer Needs: Precision & Quiet Operation for Medical Coating
The manufacturer relies on medical coating machines to apply biocompatible coatings to devices. Their non-negotiable pump requirements were clear:
- Repeated low-pressure startup: Coating processes demand frequent pump restarts at pressures below 2 bar to avoid material surges that ruin coating uniformity.
- Ultra-low noise: Cleanrooms and medical manufacturing facilities require quiet equipment to maintain a controlled, distraction-free workspace—noise levels needed to stay well within industry benchmarks.
Previously, the manufacturer used a renowned brand’s diaphragm pump. However, when testing BSK’s solution, they found it not only met but exceeded their performance expectations, leading to a full switch.

BSK’s Advantage: Test-Proven Performance for Medical Use
BSK’s 1/2” PP pneumatic diaphragm pump was purpose-built to address the medical coating machine’s needs, with test results that validated its reliability:
- Low noise operation: Specialized design and materials kept noise levels far below the 75dB threshold—critical for maintaining a quiet manufacturing environment, even during long production runs.
- 1.5 bar startup pressure: The pump handled repeated starts at just 1.5 bar (well below the customer’s 2 bar maximum requirement), ensuring consistent, surge-free delivery of coating materials. This stability eliminated coating defects caused by uneven material flow, boosting product yield.
These performance metrics allowed BSK to 100% replace the manufacturer’s previous renowned brand pump, with no compromises on operational efficiency or coating quality.

Application Results: Stable, Quiet Production
Since integrating BSK pumps into their medical coating machines, the manufacturer has seen tangible improvements: repeated low-pressure starts run smoothly without material waste, and the low-noise operation keeps their cleanrooms compliant with environment standards. The pump’s consistent performance has also reduced coating defects, cutting rework costs and speeding up production timelines.
Ready to Elevate Your Medical Coating Process?
If your medical coating machines require pumps that handle repeated low-pressure starts, operate quietly, and deliver reliable material flow, BSK’s pneumatic diaphragm pumps are engineered for the task. Whether replacing an existing pump or outfitting new equipment, our 1/2” PP pump’s test-proven performance ensures precision that aligns with medical manufacturing’s strict standards.
Contact BSK today to discuss your medical coating machine’s specific needs, and learn how our pumps can support consistent, high-quality device production.
Explore BSK Pneumatic Diaphragm Pumps
Looking for the right AODD pump for your application? BSK Fluid Technology offers a complete range of pneumatic diaphragm pumps in aluminum, stainless steel, cast iron, PP, and PVDF. With 30+ years of manufacturing expertise and patented ceramic air valve technology, we deliver reliable fluid transfer solutions worldwide.
Learn more: About BSK Fluid Technology | AODD Pump Products | Pump FAQ | Contact Our Engineering Team
Frequently Asked Questions
Are BSK pumps suitable for explosive / ATEX environments?
Yes. AODD pumps are powered by compressed air with no electricity, making them inherently safe for ATEX Zone 1/2 (gas) and Zone 21/22 (dust). For ATEX compliance use a conductive grounded metallic body or PTFE diaphragms with conductive additive for plastic bodies, and route the air exhaust to a safe area.
Why choose an AODD pump instead of a centrifugal pump?
AODD pumps excel with high-viscosity fluids (up to 10,000 cP), abrasive slurries and shear-sensitive liquids. They run dry without damage, are self-priming, handle solids up to 6mm, and are safe for explosive environments with no electricity. Centrifugal pumps suit very high flow (>1000 L/min) or high pressure (>10 bar).
What industries use AODD pumps?
AODD pumps are used in chemical processing, food & beverage (dairy, wine, CIP), painting & coating, ceramics & mining (slurries, glazes), pharmaceuticals, oil & gas, water treatment, electronics, automotive, and pulp & paper. Their ability to handle abrasives, solvents and shear-sensitive fluids makes them ideal across these sectors.
What pump body materials are available?
BSK offers five body materials: Aluminum alloy (general purpose, oils), Stainless steel 316 (corrosive chemicals, food, pharma), Cast iron (low-cost industrial, wastewater), Polypropylene/PP (acids, alkalis, lightweight), and PVDF (strong acids, solvents, high-purity).
Where can I get a quote for the right AODD pump for my application?
BSK Fluid Technology engineers provide a personalized pump selection within 24 hours. Share your fluid properties, flow rate and pressure requirements via the Contact page or WhatsApp +86-134-3105-8937, and we will recommend the optimal model from our aluminum, stainless steel, cast iron, PP and PVDF AODD range.



