PVDF Pall Ring Product Description

The PVDF Pall Ring is a premium random packing injection-molded from polyvinylidene fluoride (PVDF), a high-performance fluoropolymer with a unique balance of chemical resistance, thermal stability, and mechanical strength. Unlike standard plastics such as PP or PVC, PVDF withstands continuous operating temperatures up to 150°C and resists a broad spectrum of aggressive chemicals including wet chlorine, chlorine dioxide, sulfuric acid, sodium hydroxide, and halogenated solvents. The classic Pall ring geometry—cylindrical with two rows of open windows and inwardly bent tongues—ensures excellent gas-liquid contact, high voidage, and low pressure drop. These properties make the PVDF Pall Ring indispensable in chlor-alkali plants, wet chlorine drying towers, strong acid scrubbing, and other demanding mass transfer processes where standard plastic packings would degrade or fail.

Product Highlights

• Outstanding High-Temperature Performance: Continuous operation up to 150°C, significantly exceeding PP (90°C), PPH (100°C), and PVC (60°C), and suitable for hot acid and hot chlorine gas services.
• Superior Chemical Resistance: Excellent resistance to wet chlorine, Cl₂, ClO₂, H₂SO₄, NaOH, and chlor-alkali environments. PVDF retains its properties in boiling water and resists oxidation, making it ideal for chlorine drying and strong acid scrubbing.
• High Mechanical Strength: PVDF exhibits compressive strength exceeding 10 MPa, providing far greater rigidity and load-bearing capacity than PP, PVC, or CPVC, preventing deformation in deep packed beds.
• Proven Pall Ring Geometry: The open window and internal tongue design delivers high mass transfer efficiency, large voidage (up to 92%), and low pressure drop.
• Excellent Aging & Fatigue Resistance: PVDF offers outstanding resistance to aging, UV degradation, and fatigue, ensuring long service life even in continuous high-temperature operation.
• Ideal for Chlor-Alkali Industry: Widely specified for chlorine drying systems, wet chlorine scrubbing, and HCl absorption towers where only PVDF or PTFE can survive the combination of high temperature and aggressive chemical attack.