Working Principle
This air-operated double diaphragm (AODD) pump utilizes compressed air directed alternately behind two symmetrical diaphragms to create reciprocal stroke action. Fluid is drawn into the liquid chamber through the lower check valve and forced out through the upper check valve. This pneumatic displacement eliminates rotating shafts and mechanical dynamic seals, preventing shear degradation and friction heat generation in pumped media.
Core Advantages
• Stall-Free Air Valve: Non-icing, lubrication-free pneumatic distribution system prevents unexpected production line shutdowns.
• Zero-Contamination Risk: Outer body constructed from electro-polished 316L stainless steel with a surface finish up to Ra <= 0.4 um.
• Shear-Sensitive Fluid Handling: Gentle displacement action preserves the physical structure of delicate emulsions, cells, and particulate suspensions.
• Clean-In-Place (CIP) / Sterilize-In-Place (SIP) Ready: Self-draining internal fluid paths prevent dead legs and bacterial harboring.
Typical Media Handled
Tomato paste, chocolate, fruit concentrates, high-viscosity syrups, dairy products, edible oils, cosmetic creams, and active pharmaceutical ingredient (API) slurries.
Typical Industries
Food & Beverage, Commercial Brewing & Winemaking, Pharmaceuticals, Biotechnology, and Personal Care Manufacturing.
Technical Specifications & Selection Guide
|
Model Code |
Port Size (Tri-Clamp) |
Max Flow Rate (L/min) |
Max Discharge Pressure (bar) |
Max Solid Size (mm) |
Wetted Materials |
Diaphragm Options |
|
SBF-25S |
1 inch |
150 |
8.4 |
3.2 |
316L Stainless Steel |
PTFE / EPDM (FDA) |
|
SBF-40S |
1.5 inch |
340 |
8.4 |
4.8 |
316L Stainless Steel |
PTFE / EPDM (FDA) |
|
SBF-50S |
2 inch |
560 |
8.4 |
6.4 |
316L Stainless Steel |
PTFE / EPDM (FDA) |
Application & Process Integration
Mounts directly onto mobile utility carts or fixed sanitary process skids using standard Tri-Clamp quick-disconnect fittings.
Maintains particle integrity in chunky sauces or delicate dairy curds by operating at lower pulse frequencies.
Withstands caustic soda (NaOH) and nitric acid (HNO3) chemical flushes at temperatures up to 100°C without elastomer degradation.
Engineering Verification, Standards & Asset Downloads
Material Traceability: Wetted components supplied with full EN 10204 3.1 material test certificates upon request.
Surface Roughness Testing: Verified via contact profilometer testing to ensure internal weld seams meet specified Ra thresholds.
Pressure Testing: Every unit undergoes dry-prime and hydrostatic testing at 1.5 times working pressure prior to crating.
Regulatory Compliance & Factory Certifications: Manufactured in our dedicated ISO 9001-certified facility under strict quality controls, with units verified by third-party inspection (SGS/TÜV options available) to ensure full compliance with CE and 3-A sanitary standards. Internal elastomers comply with FDA 21 CFR 177.2600 and EC 1935/2004 food contact regulations.
Request a Technical Quotation
To configure a pump matching your process line parameters, provide the following operational inputs:
• Fluid name, viscosity (cP), and specific gravity.
• Operating temperature range and CIP chemical exposure details.
• Required flow rate (L/min or m3/h) and total dynamic head (m).
• Preferred connection standard (Tri-Clamp, DIN, or SMS).
[ Request Engineering Datasheet & Pricing ]
Frequently Asked Questions
Q: What surface finish (Ra) options are available for the wetted parts?
A: Standard production delivers an internal mechanical polish of Ra <= 0.6 um. Electro-polished options achieving Ra <= 0.4 um are available for high-purity pharmaceutical and sterile biotech duties.
Q: How do you prevent elastomer contamination in food processing?
A: All wetted elastomers (diaphragms, valve balls, and O-rings) are molded from FDA-compliant virgin PTFE or food-grade EPDM. They contain no plasticizers or animal-derived ingredients, eliminating extractable leaching risks.
Q: Can this pump run dry without damaging internal components?
A: Yes. The pneumatic air motor design permits indefinite dry running without generating frictional heat, scoring cylinder walls, or burning out dynamic seals.
Q: Are sanitary Tri-Clamp connections standard on inlet and outlet ports?
A: Yes. 316L sanitary Tri-Clamp ferrules are standard on all process ports, allowing tool-free disassembly for routine inspection and manual cleaning.
Q: What is the maximum solid handling capacity?
A: Solid passing capability depends on pump size: 1-inch models handle up to 3.2 mm particles, while 2-inch models accommodate up to 6.4 mm compressible solids without clogging check valves.
Q: What documentation is provided with shipment?
A: Each pump ships with an Installation, Operation, and Maintenance (IOM) manual, dimensional drawing, FDA elastomer compliance declaration, and material test reports (MTRs) if requested at order placement.
Q: What is the typical maintenance downtime and availability of spare parts?
A: Thanks to the bolt-together clamp design without complex mechanical seals, routine diaphragm or check valve replacement can be completed on-site in under 30 minutes. We maintain a full inventory of FDA-compliant service kits ready for global dispatch.
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