Metaval’s Evasser Balls are designed to fluidize dry bulk powders and granular materials in storage vessels. They promote efficient flow by continuously introducing low-pressure air into the stored material, restoring its fluidity and preventing clogging or bridging. These aerators are ideal for silos, bins, hoppers, and other bulk storage systems where material flow is critical.
12" (305 mm)
2–5 psi (0.14 to 0.35 bar)
Up to 80 psi (5.5 bar)
Up to 80 psi (5.5 bar)
~3 psi (0.2 bar) / 3 scfm (0.085 m³/min)
Up to 900°F (480°C) with sintered insert
2–5 psi (0.14 to 0.35 bar)
12" (305 mm)
• Cement, Fly Ash, Soda Ash, Gypsum, Bentonite
• Flour, Lime, Carbon Black, Powders & Granules
• Silos, Bins, Hoppers, Dry Bulk Transport
• Food & Beverage, Construction, Chemical Industries
• ISO 9001:2015
• ISO 14001:2015
• ISO 45001:2018
• ASME B31.3 for pressure design
• FDA compliance for food-grade boot (optional)
• PED 2014/68/EU (as applicable for pressure vessels)
• Body: Cast Iron or 316 Stainless Steel
• Mounting Plate (optional): Mild Steel or 316 SS
• Boot: Standard Black Neoprene (175°F/80°C)
– Optional White FDA EPDM (175°F/80°C)
• Sintered Metal Insert (optional):
– Bronze 90 micron (standard)
– Bronze 40 micron (for fine materials)
• Gasket: Cork (mild steel plate), White Nitrile (SS plate)
• Air Inlet: 1/2” NPT Coupling
• No moving parts – low maintenance
• Easy installation – external mounting options available
• Bi-directional aeration for wall sweeping effect
• Eliminates noise and vibration from traditional vibrators
• FDA-compliant materials available for food-grade use
• Compact, versatile design compatible with most bins
Best installed in four rows at each quadrant of sloping bin bottoms
• Typical spacing: 18 inches apart, with lower units near outlets
• Placement for granular materials depends on bin geometry
• Consult Metaval experts for material-specific configurations
• Option 1 – Cast Iron, Black Boot
• Option 1A – Cast Iron, Sintered 90 Micron Insert
• Option 1C – Cast Iron, Sintered 40 Micron Insert
• Option 1SS – SS316, FDA White Boot
• Option 3 – Cast Iron, Black Boot + Steel Mounting Plate
• Option 3A – Cast Iron, Sintered Insert + Steel Mounting Plate
• Option 3SS – SS316, White Boot + SS Mounting Plate
• Pressure Testing
• Material Traceability & PMI
• ISO 9001:2015, 14001:2015, 45001:2018
• PED 2014/68/EU (on request)
• FDA Food Grade Certification (for white EPDM boots)
• Other testing on request: UT, DPT, X-ray, Hardness, Impact
Please specify:
• Material Type
• Mounting Plate Requirement
• Boot Type (Standard or FDA)
• Insert Type (Standard or Fine Filter)
• Application Pressure & Temperature Conditions
From forging and casting to machining, assembly, and testing — every step is managed under one roof to ensure consistent quality, faster lead times, and zero compromise.
Get in touch with our team for additional information on product pricing, technical data, project support and more.
