
A leading ready-to-eat food manufacturer recently solved its boiled egg conveying by adopting BSK’s FDA-certified food-grade pneumatic diaphragm pumps, achieving significant improvements in product integrity and production efficiency. The collaboration highlights how BSK’s specialized fluid handling solutions address the unique challenges of delicate food material transportation in compliance with strict food safety standards.
The Challenge: Protecting Delicate Boiled Eggs in High-Volume Production
The manufacturer’s production line involves conveying shelled boiled eggs (both whole and halved) from the cooking station to packaging, a process that previously faced two critical issues. First, conventional pumps caused frequent egg breakage—their rigid conveying mechanism and uneven pressure led to a 15% product loss rate, increasing raw material costs. Second, hygiene compliance was difficult to maintain: the old equipment had hard-to-clean crevices that trapped egg residue, requiring lengthy disassembly for sanitization and risking cross-contamination.
As demand for their pre-packaged boiled egg products surged, the manufacturer urgently needed a solution that could preserve egg integrity, meet FDA food safety requirements, and keep up with 24-hour production schedules.

The Solution: BSK FDA-Certified Food Pump’s Targeted Design
After evaluating multiple options, the manufacturer selected BSK’s FD&FS-series food-grade pneumatic diaphragm pumps, engineered specifically for delicate, high-hygiene food applications.
Gentle Conveying to Preserve Product Integrity
BSK’s pump uses a flexible diaphragm-driven mechanism that delivers smooth, adjustable pressure—eliminating the impact and shear forces that caused egg breakage. The widened, smooth-flow channel (polished to a Ra≤0.8μm finish) minimizes friction against the delicate egg surface, while the pneumatic drive system adapts to both whole and halved eggs without needing adjustments. This design ensures eggs retain their shape and texture throughout conveying .
FDA-Compliant Hygiene for Seamless Sanitization
Constructed with 316L stainless steel (certified food-grade by FDA) and EPDM seals, the pump meets the strictest food contact material standards . Its seamless, dead-space-free structure eliminates hidden crevices, while compatibility with Clean-in-Place (CIP) systems allows thorough sanitization without disassembly. This cuts cleaning time by 60% compared to the manufacturer’s previous equipment, ensuring compliance with HACCP guidelines .

Reliable Performance for Continuous Production
The pump’s modular air motor design reduces wear parts and operates without electrical components, avoiding downtime from mechanical failures common in electric pumps . Its corrosion-resistant materials also withstand the acidic residues from egg whites, ensuring stable operation even during 24-hour production runs.
The Outcome: 98% Product Integrity and Streamlined Operations
Since integrating BSK pumps into the production line three months ago, the manufacturer has seen transformative results:
Boiled egg breakage rate dropped to less than 2%, reducing raw material waste by over 85%.
Sanitization time per shift decreased from 90 minutes to 35 minutes, boosting overall line efficiency by 22%.
Routine hygiene inspections show zero residue buildup, maintaining consistent FDA and EU compliance.
“The BSK pump’s gentle conveying and easy-to-clean design solved our two biggest headaches,” said the manufacturer’s production manager. “We no longer sacrifice product quality for speed, and the compliance peace of mind is invaluable for our brand.”

BSK’s Edge in Food-Grade Conveying
This case underscores BSK’s expertise in tailoring fluid handling solutions to food industry needs. By combining FDA-certified materials, application-specific design (like low-shear conveying for delicate foods), and hygiene-optimized construction, BSK’s food pumps deliver both performance and compliance.
For food manufacturers dealing with delicate, high-value materials—from boiled eggs and dairy products to ready meals—BSK’s FDA-certified pumps offer a reliable path to reducing waste, improving efficiency, and upholding food safety standards.
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
What is an air-operated double diaphragm (AODD) pump?
An AODD pump is a positive displacement pump powered by compressed air. Two flexible diaphragms connected by a common shaft are driven back and forth by an air valve. When one diaphragm pushes fluid out, the other draws fluid in, creating continuous flow. AODD pumps are self-priming, can run dry, need no electricity, and handle a wide range of viscosities and solids.
How do I select the right AODD pump size (flow rate)?
BSK AODD pumps range from 3/8" (20-30 L/min) to 3" (900-1000 L/min). Select a pump that delivers 20-30% more flow than your minimum requirement so you can throttle for longer diaphragm life. Port sizes: 3/8" for lab/dosing, 1" for general industrial, 2" for large transfer, 3" for bulk/mining applications.
What air pressure does an AODD pump need?
BSK AODD pumps operate between 2-7 bar (30-100 PSI). The patented ceramic air valve allows an ultra-low 0.6 bar start pressure (competitors need 1.5-2 bar). The optimal operating range is 3-6 bar for the best balance of flow, energy use, and diaphragm life.
How do I choose the right diaphragm material?
PTFE (Teflon) for strong acids, alkalis and solvents; Santoprene for general purpose, food-grade and mild chemicals (longer life); Viton (FKM) for oils, fuels and high temperature; Nitrile (Buna-N) for petroleum and wastewater. BSK also offers PTFE-backed Santoprene composite diaphragms combining chemical resistance with long flex life.
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.



