Silicone dust caps for dust-tight powder transfer
Achieve dust-tight containment and efficient powder transfer with flexible silicone caps, designed to fit seamlessly into your existing process equipment for enhanced safety and control during charging and discharging.

Ensures Dust-Tight Powder Transfer and Containment
The Uni-Cap and Uni-Cap+ from Hanningfield are silicone dust caps designed for effective dust-tight powder transfer and containment, integral to maintaining cleanliness and efficiency in production lines across the pharmaceutical, food and beverage, nuclear, chemical, cannabis, and nutraceutical industries. These systems use a flexible silicone rubber seal, allowing for the controlled charging and discharging of powders, reducing contamination and ensuring safety. Applications include sealing contacts for powdered pharmaceutical drugs, nutritional supplements, protein powders, and more. The Uni-Cap models offer compatibility with various stainless steel mounting rings, while the Uni-Cap+ ensures visibility with its transparent design. Both models meet stringent hygienic standards, are compliant with FDA regulations, and are available with customization options to meet specific operational needs. Easily retrofitted to existing equipment, these caps support both manual and batch operations, providing robust solutions for powder containment challenges.
Benefits
- Enhances production safety with dust-tight sealing, preventing powder leaks and contamination.
- Facilitates easy retrofitting and integration into existing systems, reducing installation costs.
- Offers transparent design for real-time monitoring of process conditions and powder flow.
- Ensures regulatory compliance with FDA-approved silicone material, suitable for strict hygiene standards.
- Provides flexible sizing options and customization, optimizing fit for varied process equipment.
- Applications
- Nuclear,Nutraceuticals,Chemical,Food and beverage,Cannabis,Pharmaceuticals
- End products
- Protein powders,Nutritional supplements,Instant soup mixes,Beverage powders,Chemical reagents,Cannabis oil capsules,Nuclear fuel pellets,Powdered pharmaceutical drugs
- Steps before
- Grinding,Powder Transfer,Material Charging
- Steps after
- Dust Containment,Tablet Pressing,Process Sealing
- Input ingredients
- powders,tablets,granules
- Output ingredients
- contained powders,dust-tight output
- Market info
- Hanningfield Process Systems is known for manufacturing high-quality, customized process handling, and containment equipment for industries such as pharmaceutical, food, and chemical, specializing in milling, sieving, and powder handling solutions.
- Diameter
- 60mm/2.5in - 460mm/18.1in
- Wall Thickness
- 8mm - 12mm
- Material Hardness
- 60 shore - 70,A shore
- Max. Spigot Size
- 50mm - 410mm
- FDA Compliance
- FDA CFR 177.2600
- USP Class VI
- Yes
- TSE/BSE Free
- Yes
- ADI Free
- Yes
- Phthalates Free
- Yes
- Material
- Translucent Silicone
- Material Options
- EPDM,Colour Options
- Dust-tight transfer
- Yes
- Visibility
- Fully transparent
- Hygienic standards
- Compliant
- Retrofitting capability
- Yes
- Compatible with Tri-Clover connections
- Yes
- Seal consistency
- Dust-tight
- Traceability
- Manufacture Batch ID embossing
- Max. spigot size
- Up to 410mm
- Abrasion resistance
- Yes
- Biological compatibility
- FDA compliant
- Cleanability
- CIP / SIP compatible
- Corrosive resistance (e.g. acids)
- Yes
- Density/particle size
- 0.5–2.5 g/cm³ / 50–1000 µm
- FDA materials
- FDA CFR 177.2600
- Diameter
- 60mm to 460mm
- Wall Thickness
- 8mm to 12mm
- Material Hardness
- 60 to 70 shore
- Height
- 32mm to 40mm
- Max. Spigot Size
- 50mm to 410mm
- Mounting Ring Outside Diameter
- 60mm to 400mm
- Mounting Ring Height
- 50mm
- Mounting Ring Wall Thickness
- 2mm
- Standard Hole Sizes
- 80mm to 210mm
- Material
- Translucent Silicone
- Material options
- Translucent silicone,EPDM
- Color options
- Blue,other customizable colors
- Size options
- 2.5″,5″,8″,10″,12″,16″
- Tooling options
- Custom tooling for unlisted sizes
- Embossing options
- Manufacture Batch ID for traceability
- Mounting options
- Tri Clover connections,IBC manways