KEM-GROUP USA Plastic Random Packing Outlook

Increases in production and the demands for more environmentally friendly processes has highlighted the importance of mass transfer equipment and products such as plastic random packing. While all components and internals of an air scrubber or air stripper are important, the plastic random packing plays an extremely critical roll in the overall efficiency of a system. We have seen a significant increase in the attention given to the specific design of a particular tower packing style and more focus on its size, surface area and configuration as it relates to performance. More attention has also been given to the plastic random packing’s material of construction. Customers are increasingly performing product life span analysis and long term operating cost evaluations in an effort to get the most out of their system’s performance. This is why Kem-Group USA offers a diverse line of plastic random packing products in a variety of configurations and materials. Tower packing styles include the traditional Saddle style packing.

The versatile Pall Ring, the KemFlake and the high performance Tri-Pack style random packing. While all Kempac styles offer excellent performance and are of the highest quality, the Tripack continues to be the industry’s leading choice. The Tri-Pack offers a unique design of specially positioned ribs, struts and drip rods which provide the ideal balance of surface area and open space. It spherical shape allows each individual element to roll into the proper position eliminating void areas with in the packed bed. The Tri-Pack is also available in numerous resins to meet the most demanding applications. Whether you are designing a new system or upgrading an existing unit Kem-Group has a plastic tower packing to meet your requirements.

The tightening of environmental regulations and the push to reduce or eliminate emissions will increase the demand for tower packing for many years to come. Our long term strategy at Kem-Group is to focus on manufacturing a diverse and complete line of plastic random packing and at the same time expand our research and development of tower packing to ensure that we continue to offer the most cost effective and efficient plastic random packing on the market.

We have given special attention to expanding the materials in which our tower packings may be manufactured in. While our current available materials such as Polypropylene, Polyethylene, CPVC, PVDF, Tefzel, Teflon and Halar cover a very wide range of applications and operational conditions, we continue to test alternative materials which may expand the capabilities of our plastic random packings. Expanding the available materials of construction will also help reduce the strain of an ever changing supply chain. New applications and an expanding market will create challenges but also provide more opportunities for our mass transfer products.

Continually investing in research and development will keep Kem-Group and Kempac products on the forefront of the plastic random packing industry. For more information on products manufactured by Kem-Group please visit our website at or give us a call. We would be happy to discuss your application for plastic random packing.

Kempac Random Packing Update October 2022

As a leading manufacturer and supplier of plastic random packing Kem Group USA is continuously evaluating our supply chain management, manufacturing processes, customer service and research development efforts to ensure that we can meet or exceed our customer’s expectations and needs. The random packing industry has faced numerous challenges over the last few yours such as COVID which have created shortages in raw material availability and increased cost. Kem Group USA has worked closely with suppliers and customers to minimize any negative affect to our efforts to plastic random packing. In addition to our continuous efforts to control the cost of our finished products we offer an extremely diverse random packing product line which gives our customers a variety of options from both an application and design position. Our Tower packing product line includes the high performance Tri-Pack who’s design results in efficient mass transfer and lower operational cost. The Tri-Pack is manufactured in 1”, 2” and 3.5” sizes and is available in a variety of resins. Kem Group’s Kempac Pall Ring tower packing is a traditional ring style packing who’s design provides excellent surface area for gas and liquid contact. The Pall Ring also maintains even liquid distribution throughout the packed bed. The Kempac Pall Ring style packing is available in 1”, 2” and 3.5” sizes and in a variety of resins. We also offer the conventional Saddle packing style which promotes high mass transfer rates through effective liquid surface renewal. Kem Group’s newest random packing product is the KemFlake. The KemFlake is a high performance packing which give customers flexibility in system design at an economical level. In the future Kem Group intends to develop more cost effective and highly efficient plastic random packing styles giving our customers even more options. Our research and development division is constantly evaluating our random packing designs and developing new potential designs and styles to bring to market. In order to address some of the issues regarding resin availability we are evaluating new materials in which our tower packing may be manufactured in giving our customer more available options. In today’s market the availability of standard resins such as polypropylene, PVC, CPVC and PVDF can be unpredictable from both an availability and cost stand point. Having access and the ability to manufacture our random packing in additional resins will alloy us to continue to provide our customer with even more cost effective solutions. Kem Group is constantly evaluating our distribution centers in both Houston, Texas and Richmond Hill to ensure efficient and cost affective shipping options for our customers throughout the United States and beyond. Increased inventory space, facility upgrades and continuous personnel training are just a few of the ways Kem Group USA is improving our distribution process and capabilities. Maintaining our reputation for manufacturing the highest quality plastic random packing on the market is of up most importance to our company and one we thrive to maintain. For more information on plastic random packing products manufactured by Kem Group USA please visit our website at or feel free to call us.

Selecting Random Packing

If random packing is required for your application, Kem Group USA can help you determine the most efficient and economical plastic random packing. As a leading manufacturer of plastic random packing Kem Group USA offers random packing in a variety of sizes, configurations and materials. Kem Group offers the Tri-Pack, Pall Ring, Saddles and KemFlake random packing in a multiple sizes and resins.

The following should be considered what selecting the plastic random packing best suited for your application:

Uniform Distribution
Random Packing should facilitate even distribution of liquid and or gases through out the packed bed and be free of void spaces and channels. Some random packing products such as the Tri-Pack are specifically designed to avoid settling and nesting so that uniformed distribution through a packed bed can be achieved.

The Surface Area of the Random Packing
Too much surface area can impede proper gas and liquid contact and results in higher pressure drop resulting in increases in operating cost. Products such as the Tri-Pack offer the ideal surface area to open area ratio which results in excellent mass transfer efficiency.

Material Selection
Kem Group USA Plastic random Packing is available in a variety of resins such as polypropylene, glass-filled polypropylene, polyethylene, PVC, CPVC, PVFF, Trfzel, Teflon, Halar and more. The material selection of a plastic random packing is determined by a handful of factors including temperature, chemical composition and cost. The initial cost of a high performance resin may be significantly more than a general purpose polypropylene but will be more temperature resistant and will have longer product life.

The Packing Wetting Rate
The lower the wetting rate, the lesser the stability level of the packing. Dewetting happens when the falling liquid interrupts the liquid on the surface. As a result, when the packing surface dewets, the efficiency is reduced.

The Strength of the Random Packing and Minimized Friction
Mechanical damages form an essential part of the industrial part. Accordingly, the random packing you choose must provide resistance to mechanical damages caused on account of weight. Besides, minimized friction, with the help of an open shape with aerodynamic features, increases capacity. So, ensure that you check the friction levels before choosing a random packing.

Void created by random packing
Higher the void of the random packing, lower the resistance to vapor up flow, lower the pressure drop, and the higher the capacity. A higher capacity is the result of the particle size of the packing. The packing’s suitable size must strike a balance between capacity and packing efficiency.

Selecting the most efficient plastic random packing based on your specific application and process data can be a significant savings in both money and time. Strong consideration should be given to the above points as you evaluate different plastic random packing products. Kem Group gives you multiple options such as the Tri-Pack, Pall Ring and Saddle all available in three different sizes and multiple resins. For more information on plastic random packing products manufactured by Kem Group USA please visit our website at


If you are involved in the manufacturing or wastewater treatment industry and work as a plant manager, a process engineer, or a purchasing or Environmental Health and Safety (EHS) professional, then you may be looking for a solution to remove harmful pollutants and odors from your process exhaust streams before they are released into the atmosphere and contaminate the outside air. Industrial scrubbers are a technology that can fulfill these needs.

In order to remove gas pollutants and odors from exhaust streams, industrial scrubbers serve as pollution filtration systems that use solids (in “dry scrubbers”) or water or other liquids (in “wet scrubbers”). A few advantages of industrial scrubbers include low-risk processing of incendiary gases, its ability to handle high-temperature, high-humidity gas streams without temperature limit or condensation problems, no secondary dust sources, and its ability to neutralize corrosive gases and absorb gas and solid particulate matter with the use of a single device. Furthermore, small spaces can accommodate industrial scrubbers which ensures lower capital costs and site placement flexibility. The Kem-Group is proud to manufacture the most critical component of an industrial scrubber the random packing. Kem-Group manufactures plastic random packing in a variety of styles and thermoplastics. Some of the styles of plastic random packing manufactured by Kem-Group include Tri-Pack, Pall Ring, Saddle and Kemflake. These random packing styles are available in resins such as Polypropylene, CPVC, PVC, PVDF, Tefzel and more.

Dry Vs. Wet Scrubbers
Industrial scrubbers can be classified as “wet” or “dry.” Although dry scrubbers typically are unable to remove pollutants to the same extent as wet scrubbers, they are ideal for use in facilities without the necessary infrastructure to handle released wastewater.

Without use of liquids, dry scrubbers remove contaminants from exhaust gases. Alternatively, they make use of a dry reaction material (a “sorbent”), such as alkaline slurry, and are generally used to remove acid from gases by passing the gas through the sorbent “dust” to enhance binding.
Unlike dry scrubbers, wet scrubbers pass contaminated gas through a liquid that is intended to remove pollutants. More than 99 percent of airborne particulate matter may be removed using wet scrubbers, which are a flexible and affordable pollution control device.

How Wet Scrubbers Work
The most frequently used solvent for removing inorganic pollutants is water. In the most fundamental configuration, contaminated gas is sent through water that is enclosed in a metal or composite container. The water then absorbs the contaminants, and clean gas exits the scrubber.
Other liquids, in addition to water, can be used as absorbing solutions capable of removing various contaminants. The chemical composition of the absorbing solutions can be altered to change the overall charge. Since the charge of pollutants varies, wet scrubbers are filled with the liquid that will bind the most effectively to remove the contaminate from the gas. The most common scrubbing liquid used for acid-gas control (e.g., HCl, SO2, or both) is caustic solution (sodium hydroxide, NaOH), though sodium carbonate (Na2CO3) and calcium hydroxide (slaked lime, Ca [OH]2) can also be used.

Wet Scrubbing of Particulate Matter
By trapping them in liquid droplets, wet scrubbers may remove particle debris. Following the collection of the droplets, the polluting gases are dissolved or absorbed by the liquid. A mist eliminator must be used to separate any droplets from the outlet gas stream that are present in the scrubber’s incoming gas. Additionally, the produced scrubbing liquid needs to be cleaned before it can be released into the environment or used again in the plant.

The amount of power applied to a wet scrubber determines how well it can capture particulate matter. To achieve high removal efficiency, a mist eliminator that is correctly constructed and kept is also crucial.

Wet scrubbers are typically the only single air pollution management technology that can eliminate both pollutants when the gas stream contains gases and particle matter.

Packed-Bed Wet Scrubbers
Absorbers are wet scrubbers used to remove gaseous pollutants. High removal efficiencies in absorbers require good gas-to-liquid contact. A bed of plastic random packing is utilized to provide the gas-to liquid contact. To remove gaseous pollutants, various wet-scrubber designs are used, with one of the most popular sub-categories of wet scrubber known as Packed-Bed, Packed-Tower, or “acid gas” (when they are used to control inorganic gases).

Even though they can also accumulate solid particles, packed bed scrubbers are often used for the treatment of gas. In the chemical, aluminum, coke and ferroalloy, food and agricultural, and chromium electroplating sectors, as well as in acid plants, fertilizer plants, steel mills, and asphalt plants, packed-bed scrubbers are often employed.

Applicable Pollutants for Packed-Bed Wet Scrubbers
Packed-Bed wet scrubbers are used to control inorganic fumes, vapors, and gases, Volatile Organic Compounds (VOC) as well as Particulate Matter (PM) and Hazardous Air Pollutants (HAP) in particulate form (PMHAP)

How Packed-Bed Scrubbers Operate
Through inertial or diffusional impaction, interaction with a sorbent or reagent slurry, or absorption into liquid solvent, packed-bed scrubbers effectively eliminate air contaminants.

Packed-bed scrubbers have a chamber with layers of random packing media such as the Tri-Pack packing style to create a large surface area for liquid-particle contact. The effectiveness of the low gas-phase pressure drop and gas-liquid contact is influenced by the packing’s shape, weight, surface area, and price. A plate towards the bottom of the scrubber serves as support for the packing.

Waste gas is forced into the scrubber’s chamber and flows vertically or horizontally through the packing, while scrubbing liquid is used above the packing. This permits the liquid to flow down through the bed to coat the plastic random packing thus creating a layer of film. The gas stream flows up the chamber (“counter-current” to the liquid) in vertical designs (packed towers). Some packed beds, on the other hand, are designed horizontally to allow gas flow across the packing (“cross-current”).

The waste produced falls to the bottom of the chamber as the cleaned gas is then channeled through a mist eliminator incorporated into the structure’s top.

Advantages of Packed-Bed Wet Scrubbers
The advantages of Packed-Bed wet scrubbers include relatively low pressure drop, its use of Fiberglass-reinforced plastic (FRP) construction, its capability of achieving relatively high mass-transfer efficiencies, its relatively low capital cost and small space requirements, its ability to collect Particulate Matter (PM) as well as gases and the opportunity to change the height and/or type of scrubber packing media.

For more information on Kem-Group’s plastic random packing styles such as the Tri-Pack, Pall Ring, Saddle or Kemflake please visit our website at .


At Kemflo we value our customer’s opinions and commits regarding our plastic random packing and our service. We pride ourselves on providing the highest quality plastic random packing in the industry and superior service. Our goal is to provide customers with high quality, high performance random packing at an economical price. Here is some of what our customers are saying about us.

Scrubber packing is an essential part of our process so when it needs to be replaced we need a dependable source that we can count on. Whether we are in an emergency situation or performing maintenance, KemFlo always provides fast and reliable service.

Joe T.
Process Engineer
Deer Park, Texas


We switched to KemFlo’s Tri-Pack tower packing after years of dealing with under performing scrubber units. We found that the previous tower packing was not providing sufficient surface area. After installing the Tri-Pack plastic random packing we saw an immediate improvement in efficiency and an increase in the performance life of the tower packing.

Sara J.
Chemical Engineer
Little Rock, Arkansas


Our facility experienced a major failure which resulted in the loss of tower internals and plastic tower packing. With production down we were loosing money. Our process requires the use of PVDF plastic random packing which is not an off the shelf product. KemFlo was able to expedite the tower packing and get it to the job site quickly limiting down time.

Gary L.
Baton Rouge, Louisiana


KemFlo has been one of our best and most reliable vendors for a number of years. As a manufacturer of industrial scrubbers we utilize plastic random packing for our new units as well as after market customer support. It’s important for our company to respond to our customer requirements quickly and accurately so we expect a high level of service from our vendors. KemFlo has always provided us with a very high level of service such as responding to request for quotations quickly, working closely with logistical companies to ensure prompt deliveries, jump through hoops to ensure deliveries are met and more. We have developed a strong working relationship with KemFlo.

Nathan H.
Cleveland, OH


I have worked with the team at KemFlo for over ten years and have always received excellent service. KemFlo goes the extra mile to ensure we receive our plastic random packing when we need it.

Laura E.
Tampa, FL


uring an emergency shut-down we required several hundred cubic feet of the 2” Tri-Pack in PVDF material. We had a every tight window in which to receive and install the tower packing so that we could bring the system back into service. KemFlo was able to produce the Tri-Packs in PVDF and ship the packing via hot shot with time to spare.

David H.
Maintenance Manager
Houston, Texas


KemFlo manufactures plastic random packing in a variety of styles and sizes including the Tri-Pack, Pall Ring, Saddles and Kemflake. All Plastic tower packing styles are available in a variety of materials including polypropylene, polypropylene with glass, CPVC, PVDF and more. Special packaging is available upon request. Please feel free to contact us or visit our website at for more information regarding the products we manufacture.