Polypropylene Balls (PP) for Floats, Valves and Dosing Systems
REDHILL supplies polypropylene balls for floats, check valves and dosing devices. PP combines very low density with low water absorption and resistance to many water-based fluids. As a result, it suits lightweight moving parts in wet environments.
Key Technical Specifications
The values below describe selected unfilled grades. However, the formulation, additives and test conditions affect the final properties.
- Material Options: Polypropylene homopolymer and copolymer grades.
- Structure: Semi-crystalline thermoplastic.
- Hardness: Approximately 65–75 Shore D.
- Density: Approximately 0.90–0.91 g/cm³.
- Typical Upper Service Temperature: Around 80–100°C, subject to grade and load.
- Moisture Absorption: Very low.
- Electrical and Magnetic Properties: Unfilled grades provide electrical insulation and show no magnetic response.
- Food-Contact Options: Selected grades, with the required documentation confirmed on request.
Benefits of Polypropylene Balls
Solid, unfilled PP balls float in water. Therefore, they offer an option for float and level-control devices.
PP absorbs very little moisture. In addition, it resists many aqueous salt solutions, acids and alkalis.
However, homopolymer PP can become brittle in cold conditions. Some impact copolymer grades offer better toughness at low temperatures. Therefore, select the grade to match the minimum working temperature.
Applications of Polypropylene Balls
- Floats and Level Devices: Buoyant elements for water systems.
- Valves and Dosing Systems: Check balls for compatible fluids.
- Water Treatment and Laboratory Equipment: Low-mass fluid handling components.
- Food and Pharmaceutical Equipment: Selected grades for the specified contact and cleaning conditions.
Also, check chemical compatibility at the actual concentration and temperature. For prolonged sunlight exposure, specify a UV-stabilized grade.
Available Sizes and Precision Requirements
- Precision Requirements: Diameter tolerance, roundness and surface finish to an agreed specification.
- Sizes: Standard imperial and metric diameters; custom sizes on request.
Finally, send us your diameter, tolerance, color and quantity. In addition, include the fluid, load, temperature range and any food-contact requirements. We can then confirm material options and lead time.