Description
OS 21 Vertical Offset Film Fill is a high-efficiency cooling tower fill designed to deliver excellent thermal performance while minimizing the risk of fouling. Engineered with a vertical offset channel structure, this fill media ensures uniform water distribution, low pressure drop, and enhanced heat and mass transfer, even under conditions involving moderately contaminated water. It is ideal for use in industrial cooling towers, agricultural water systems, and wastewater treatment applications.
Constructed from high-quality polypropylene (PP) or polyvinyl chloride (PVC), the OS 21 fill can be manufactured in custom densities up to 80 kg/m³ to match specific structural and performance requirements. The product features over 97% free volume and an effective surface area of 148 m²/m³, enabling efficient air-water interaction while maintaining a low fouling rate. The solvent-free welding process ensures environmental compatibility and structural integrity, with options for factory preassembly or on-site installation.
The OS 21 fill is flame retardant and meets international fire safety standards including ASTM E84, UL 94, and DIN 4102-B2. Its modular design, mechanical strength, and optimized flow geometry make it a reliable choice for both new installations and system retrofits.
Key Features:
- High flexibility according to installation situation: Available in variable dimensions and multiple strength classes to suit project-specific needs.
- Optimised heat and mass transfer: Large effective surface area ensures high thermal efficiency and performance.
- High mechanical stability and load-bearing capacity: Reinforced connection points and wall structures enable safe access and handling.
- High durability: Made from aging-resistant, performance-grade materials for long-term use.
- Complies with the highest fire protection regulations: Proprietary material formulation with effective flame-retardant additives ensures full regulatory compliance.
| Specification | Value |
|---|---|
| Standard Dimensions | 2400 x 310 x 300 / 600 mm (Length x Width x Height) – Custom available |
| Channel Opening | 2 x 21 mm (Single wave height 21 mm) |
| Effective Surface Area | 148 m²/m³ |
| Channel Structure | Vertical offset |
| Material | Polypropylene (PP), Polyvinylchloride (PVC) |
| Operating Temperature | PP < 75°C (continuous), max 80°C (short-term, measured at discharge) |
| Free Volume | > 97% |
| Flammability Rating | ASTM E84, UL 94, DIN 4102-B2 |
| Density Range | Up to 80 kg/m³ (customizable) |
| Processing Method | Solvent-free welding (in-plant or on-site assembly) |
| Application Fields | Cooling towers, agriculture, wastewater treatment, material exchange |
For assistance in selecting the right fill type for your system or application, please contact our technical team.
