PP Raschig Ring Product Description

The PP Raschig Ring is the first generation of random tower packing, invented by Friedrich Raschig in 1914. Its design is a simple hollow cylinder with a height equal to its outer diameter. Manufactured from polypropylene (PP), this packing offers excellent resistance to most inorganic acids, organic acids, and organic solvents, while its smooth cylindrical surface and open structure prevent solids build-up and fouling. The PP Raschig Ring provides a large surface area within the tower volume for gas-liquid interaction, with high voidage and low pressure drop. Although more advanced packings like Pall rings offer higher efficiency, the PP Raschig Ring remains widely used where low cost, chemical resistance, and reliable performance are the primary requirements.

Product Highlights

• Lowest Cost Among Plastic Packings: The simple hollow cylinder design requires minimal raw material and manufacturing complexity, making it the most economical plastic random packing available.
• Excellent Corrosion Resistance: PP material resists most inorganic acids, organic acids, and organic solvents (except HF), ensuring long service life in moderately aggressive chemical environments.
• Anti-Clogging & Anti-Fouling: With no internal structures or narrow openings, solids and slurries pass through easily, making it ideal for fouling services and systems with suspended particles.
• High Voidage & Low Pressure Drop: Void fraction of 90–96% ensures free gas and liquid passage, minimizing energy consumption and allowing higher throughput.
• Moderate Temperature Service: Suitable for continuous operation up to 100°C, covering most scrubbing, absorption, and drying tower applications.
• Lightweight & Easy Installation: Weighing far less than ceramic or metal packings, PP Raschig rings reduce tower structural load and simplify loading and replacement.