Diaphragm Pumps
Air-operated diaphragm pumps (AODD) are a reliable solution for transferring aggressive chemicals, viscous products, abrasive liquids, or media with suspended solids — especially when safety, dry-running capability and easy flow control are required.
Key benefits
Gentle pumping action (low shear) and smooth transfer for sensitive media
Self-priming and suitable for dry running / overload-proof operation
Adjustable flow rate by simply regulating air pressure/air volume
Suitable options for hazardous areas (ATEX/Ex versions available depending on model/material)
Ruby Diaphragm Pumps (AlphaDynamic) – Oil-Free Air Valve
AlphaDynamic Ruby Air Double Diaphragm Pumps (1/4″ to 3″) handle a wide range of fluids—from low to highly viscous liquids, even with suspended particles. Suitable for industries such as Chemical, Marine, Food & Beverage, Cosmetics, Paint, Textile, Water & Sludge, and Oil & Gas.
Available in PP, PP+CF, PVDF+CF, Aluminium, and Stainless Steel 316, Ruby pumps feature an innovative oil-free air valve and offer key benefits including ATEX (Zone 1–2) options, PTFE / PTFE-A diaphragm technology, dry-running, self-priming, no air lubrication, adjustable flow & head, submersible operation (on request), easy manifold reversal, and long service life.
Operating temperatures (by material): -5°C to +60°C (PP/PP+CF), -10°C to +120°C (PVDF+CF), -10°C to +130°C (Aluminium/SS316).
Ruby 112 (compact AODD) – quick overview
For compact installations, Ruby 112 offers strong performance in a small footprint, with multiple material options to match chemical compatibility needs.
Key points (Ruby 112)
Max flow rate: 32 L/min
Max discharge pressure: 8 bar (operating pressure 2–8 bar)
Max solid size: 3.0 mm
Connections: 1/2” BSP (liquid), 3/8” (air)
Construction materials: PP, PP+CF, PVDF+CF (depending on configuration)
RubyPharma – Sanitary diaphragm pumps for Food, Beverage, Cosmetics & Pharma
RubyPharma pumps are designed for hygienic applications, focusing on cleanability, surface finish and fast dismantling.
Highlights
Mechanically polished AISI 316L, surface finish Ra 0.8 μm
Standard Tri-Clamp connections
Designed for CIP/SIP cleaning and sterilization
“Quick Emptying System” for complete drainage and easier sanitation
Certified for potentially explosive atmospheres (ATEX II 2/2 G/D)
FLUX Air-Operated Diaphragm Pumps
FLUX RFM (solid construction)
RFM pumps are suited for many industries (chemicals, paints/coatings, solvents, adhesives, water & sewage), especially when higher discharge pressure is required.
RFM advantages (overview)
Robust solid construction
4 model sizes, up to 375 L/min max delivery rate (depending on size)
Pump housing in PP or PTFE
Conductive versions RFML for hazardous areas; FDA-compliant versions available (depending on configuration)
FLUX FDM (injection-moulded / cast version)
FDM pumps cover a wide range of applications with many sizes and material combinations.
FDM advantages (overview)
7+ sizes with flow rates from 20 L/min to 1040 L/min (depending on size)
Available in PP, PVDF, acetal, aluminium, stainless steel, grey cast iron
Dry-running / overload-proof, self-priming, infinitely variable via air volume
Note: Designed for operation with oily (lubricated) compressed air via maintenance unit
Download
Download the brochures/datasheets for full technical specifications and selection guidance:
FAQ
Are air-operated diaphragm pumps (AODD) self-priming?
Yes. AODD pumps are typically self-priming and are widely used for suction lift duties, making them suitable for drum/IBC transfer, sump duties and intermittent pumping.
Do you offer ATEX / Ex diaphragm pumps?
Yes. ATEX/Ex versions are available depending on the manufacturer range, model and materials (e.g., conductive versions for hazardous areas). Share your zone and medium details and we’ll propose the correct compliant configuration.
Do you supply hygienic / sanitary diaphragm pumps for food and cosmetics?
Yes. RubyPharma pumps are designed for hygienic applications and typically feature AISI 316L stainless steel, a high-quality surface finish, and Tri-Clamp connections for easy dismantling and cleaning. They are suitable for processes requiring CIP/SIP (application-dependent).
Which materials are available for chemical compatibility?
Material selection depends on the exact liquid and conditions. Options may include PP, PVDF (and reinforced variants) for chemical resistance, and stainless steel for hygienic/industrial duties. Send the liquid name + concentration (or SDS) and we’ll confirm compatibility.
What information do you need to recommend the right diaphragm pump?
To size and specify correctly, send:
Liquid name + concentration / SDS
Viscosity, temperature, and any solids size/percentage
Required flow rate and discharge head/pressure
Duty cycle and suction conditions (lift, hose length)
Area classification (ATEX/Ex if applicable)
Connection type (BSP/NPT, Tri-Clamp, etc.)
Need help selecting the right diaphragm pump?
Tell us your fluid, viscosity, temperature, solids content, required flow/pressure, and whether the area is ATEX/Ex — and TRCI will propose the right pump configuration and materials.