Reinforced RPP Pall Ring (Heavy-Duty) Product Description

The Reinforced RPP Pall Ring (Heavy-Duty) is an advanced random packing engineered to overcome the mechanical and thermal limitations of standard polypropylene packings. It is injection-molded from glass fiber reinforced polypropylene (RPP), a composite material that retains PP‘s excellent chemical resistance while dramatically improving tensile strength, stiffness, and heat resistance. The “Heavy-Duty” designation indicates additional structural enhancement—either through increased wall thickness or the incorporation of reinforced end flanges (Ralu ring style)—further boosting compressive strength and resistance to deformation under deep bed loads. These combined upgrades allow the packing to operate reliably in high-temperature services up to 132°C continuous (short-term 160°C) and in towers with bed heights that would crush standard PP packings.

Product Highlights

• Double the Tensile Strength of Standard PP: Glass fiber reinforcement increases tensile strength from approximately 29 MPa (pure PP) to over 55 MPa, providing exceptional resistance to deformation, creep, and mechanical damage.
• Elevated Temperature Rating: Continuous operation up to 132°C with short-term tolerance to 160°C, far exceeding standard PP (≤90°C) and PPH (≤100°C), and suitable for hot acid scrubbing and high-temperature absorption.
• Thickened Wall & Reinforced Flange Design: The heavy-duty version features increased wall thickness and optionally reinforced end flanges (Ralu ring style), delivering higher compressive strength and preventing collapse in tall packed beds.
• Excellent Chemical Resistance: Retains PP’s inherent resistance to most inorganic and organic acids, alkalis, and salt solutions, ensuring long service life in corrosive chemical environments.
• Proven Pall Ring Geometry: Open windows and internal tongues deliver high mass transfer efficiency, large voidage (up to 92%), and low pressure drop—comparable to metal packings but at a fraction of the weight.
• Lightweight Yet Robust: Despite the reinforcement, RPP remains significantly lighter than metal or ceramic packings, reducing tower structural load and simplifying installation while providing the strength needed for demanding services.