Top 10 Global Cooling Tower Filler Manufacturers You Should Know
Introduce to Cooling Tower Filler
Cooling tower filler (also called filling material or heat-transfer media) is one of the most important internal components of a cooling tower. Its primary purpose is to increase the contact surface and contact time between air and water so that heat can be transferred more efficiently and evaporation can occur more effectively.
Advantage of Cooling Tower Filler
Cooling tower filler is one of the most important components in a cooling tower. Its job is to increase the surface area and contact time between air and water, improving heat transfer. Here are the key advantages:
1. Improves Heat Transfer Efficiency
The filler spreads water into thin films or droplets, increasing the surface area and enhancing air–water contact.
2. Reduces Water Temperature More Effectively
Because the water is distributed more uniformly and exposed to more airflow, the cooling tower can reach lower cold-water temperatures.
3. Lowers Energy Consumption
Better heat transfer means fans and pumps don’t need to work as hard.
→ Reduces operating costs.
4. Allows Smaller Tower Size
High-performance fill media enables a more compact cooling tower footprint, which is useful in limited-space installations.
5. Improves Water Distribution
Filler helps break up water flow, preventing channels and dry spots that reduce efficiency.
Why filler is necessary
Warm water entering a cooling tower needs to release heat to the atmosphere. The fill breaks the water into thin films or small droplets, greatly expanding the surface area. This improved air–water interaction helps the tower achieve maximum cooling performance.
How to dissipate heat from filler
The heat dissipation method of cooling tower filler is mainly achieved by increasing the contact between water and air, promoting evaporation and heat transfer. It can be divided into three core principles:
1. Evaporative heat dissipation (most importantly)
When hot water is divided into thin films or water droplets on the surface of the filler, air flows through between the fillers,
Part of the water will evaporate, absorbing a large amount of latent heat (latent heat of evaporation)
This accounts for 70% -80% of the cooling effect of the cooling tower.
2. Convection heat dissipation (hot air takes away heat)
The part of water that has not evaporated is carried away with heat through air convection.
Airflow enters from the bottom or sides, and is in reverse or transverse contact with the water flow, forming forced convection.
3. Heat conduction (small amount)
When water comes into direct contact with air, heat is also transferred through molecular heat conduction, but the proportion is minimal.
Top 10 Global Cooling Tower Filler Manufacturers
1.Power Tower Cooling Technology (Shaoxing) Co.,Ltd（China)
PT is an excellent domestic manufacturer of cooling tower parts. Since its establishment in 2009, PT has always adhered to the concept of "long-lasting quality and endless innovation". PT produces various cooling tower fillers, such as S-wave fillers, cross-flow tower fillers, counter flow tower fillers，round fillers. Various brand fillers: Liangchi, Lanxun, Spindle, Ebara, Kingsun, etc. Materials include PP, PVC, UPVC.
The company has over 40 product inventions practical technology patents, and has iS09001, 1S014000, and other certifications.
Website：www.coolingtowerpart.com
2.SPX Cooling Technologies — Marley(USA)
SPX Cooling (Marley brand under its umbrella) is one of the leading manufacturers of cooling towers and accessories worldwide, including high-performance film fill/pack fill, drift extractor. Marley's MBX, DF series and other fillers are widely used in the industrial and HVAC markets, with product lines covering bottom supported, suspended, cross flow and counter flow fillers, as well as supporting drip and flow directing components. The advantages are product standardization, third-party tested thermal performance, and strong after-sales and accessory support (easy to replace/upgrade)
3.EVAPCO(USA)
EVAPCO is a major manufacturer of industrial evaporative cooling equipment and accessories, offering a variety of EVAPAK, Titan Pak, Wide Pak, Cross Pak and other filler solutions (PVC and high-temperature PP/HPVC), and providing wide spacing or metal/stainless steel packing for dirty water or high-temperature conditions. The filler of EVAPCO is commonly used in its overall cooling tower and process cooling system, emphasizing temperature resistance, flame retardancy, and chemical resistance.
4.Baltimore Aircoil Company (BAC)（Netherlands）
BAC has developed into a globally renowned supplier of cooling towers and cooling components since 1906, with its packing series such as BACount ®、 BACross ®、 BACPak ™ The replacement packing kit is used for replacement and upgrade, covering standard PVC, HPVC (high temperature), and modular hanging/block schemes. BAC holds a significant market share in power generation, industrial, and large-scale air conditioning projects, and has a sound spare parts/replacement filler plan.
5.Hewitech/HEWI (Germany）
Hewitech (sometimes written as HEWI) is a manufacturer specializing in plastic cooling/wastewater plastic components (PP, PVC, fluoropolymers), specializing in extrusion, injection molding, and systematic solutions for high-performance film fill, splash fill, and drift extractor. Its products are widely used in thermal power, petrochemical, and heavy industries, emphasizing material engineering and customized working conditions (temperature resistance, chemical resistance, high antibacterial/anti biofilm solutions).
6.Delta Cooling Towers
Delta is known for its large cooling towers and spare parts assembled in factories and installed on site, offering accessory options including high-temperature packing/packing replacement parts, splash and film solutions, and providing composite materials or PP high-temperature packing for special working conditions (high temperature, antimicrobial). Delta is widely used in projects in the Americas and overseas, particularly in customization and industrial engineering support.
7.REHAU (Germany)
REHAU is a large polymer materials and engineering plastics company that provides components such as drift extractors and splash fills for cooling towers. Its material formula and extrusion technology enable the product to have good thermal resistance (REHAU points out that some components can withstand up to~70 ° C) and long-term durability, and it has extensive cooperation with machine manufacturers in the Asia Pacific and European markets.
8.Hamon / John Cockerill Hamon
Hamon (now part of John Cockerill Hamon) has long focused on cooling solutions for large-scale processes/power plants, with its own developed high-performance film fill/staged silicon wave, low fouling fill, and heavy-duty packing materials. John Cockerill has a fill pack production line in France, which can provide customized heat exchange packing and complete spare parts for large natural suction or forced draft towers. Suitable for large-scale and industrial projects.
9.Delta Cooling Towers（USA）
Delta provides a complete set of factory assembly and on-site installation of cooling towers, and can supply various standard or high-temperature (PP) fillers/wet decking/high-tech fillers. The company is commonly seen in engineering projects in North America and overseas, with advantages in engineering support, fast on-site services, and the ability to provide filling options for antimicrobial formulations (friendly to Legionella control and maintenance). Suitable for projects that require on-site service and quick replacement.
10.Tower Components, Inc.（USA）
Tower Components focuses on cooling tower replacement parts (including film fill, splash fill, dropper, etc.) and after-sales market. The product line includes multiple specifications of film fill (such as Opti Pac, etc.) and follows CTI/industry standards. The advantage is to provide inventory and technical support for retrofit, repair, or emergency replacement, commonly used for localized services and fast delivery. Suitable for maintenance contractors and end users who require rapid replacement of fillers.
