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This section provides an overview for slit nozzles as well as their applications and principles. Also, please take a look at the list of 13 slit nozzle manufacturers and their company rankings. Here are the top-ranked slit nozzle companies as of April, 2025: 1.Milwaukee Tool., 2.KEMPER GmbH, 3.hewitech GmbH & Co.KG.
Table of Contents
Graduated with a master's degree in mechacanical engineering from the Department of Mechanical Engineering, University of Tokyo.
As a student, he was engaged in research on thermophysical properties and materials, such as thermal interface materials and heat insulating materials.
After that, he mainly engaged in the development of coating equipment and CAE work at a chemical manufacturing company. Currently, he is engaged in research and development related to CFD, molecular dynamics, chemical equilibrium, and gas-liquid equilibrium at a food manufacturing company.
Figure 1. What is a slit nozzle?
A slit nozzle is a fluid nozzle with a straight slit.
It is capable of jetting a uniform velocity distribution over the entire slit width. They are used for both gases and liquids.
For gases, they are often used as air blowers or air curtains. For liquids, they can be used for cleaning and cooling with water, as well as coating and surface treatment with chemicals.
As an option, a heater for hot air can be attached to the nozzle's inlet side for hot air curtains and uniform surface heat treatment.
Slit nozzles have various applications depending on whether the fluid inside is compressed air or water/coating liquid.
Other areas of application include electrical and electronics, vehicles and transportation, and iron and steel.
Figure 2. Principle of slit nozzle
Slit nozzles have a large pressure drop in the direction of blowout due to the narrow slit-like holes, so the manifold increases uniformity in the width direction, which results in uniform discharge in the width direction. Instead, especially with pressurized air nozzles, the large pressure loss results in high energy consumption and a large drop in discharge pressure.
When used as a liquid nozzle, this problem can be solved by using a metering pump with sufficient supply pressure. However, in the case of liquid, it is necessary to design the Slit nozzle so that it will not be deformed by the high pressure.
Slit nozzles are designed to ensure uniform flow and velocity distribution of the fluid passing through them.
Both types are available in a wide range of lineups and can be selected according to the size of the target component and its application. There is also a type in which the slit width is not fixed but can be adjusted according to the workpiece and air volume. The fixed type is easier to maintain, but the adjustable type can also be selected depending on the application.
A wide variety of materials are available, including stainless steel, PVC, aluminum, titanium, and PPS resin. Some are designed to be used exclusively with blower air, while others can generate a liquid film if the material is chemically resistant.
Uniform thin film atomization is possible, which helps reduce the cost of chemicals and deionized water. The spray direction can be up, down, or sideways, and if the product size is small, it can also be used in narrow gaps.
Figure 3. Selection of slit nozzle
Slit nozzles are used for a variety of air, gas, water, and chemicals. They are also used for a wide variety of applications, including drying, cooling, cleaning, air curtains, and application. Slit nozzles can be used for multiple applications, but the performance required is different, for example, air pressure rather than uniformity for cleaning applications, and uniformity for application, so it is best to select the slit nozzle that is most optimally designed for that application.
Slit nozzles sold by various companies are designed to some extent in consideration of the intended use, so it is important to confirm the design. For slit nozzles that use pressurized air or gas as the working fluid, specifications such as impact pressure and noise level are listed.
For slit nozzles, the width and length of the slit and the material are the most important basic specifications. Once these are determined, other important points include maintainability, whether the slit width and length need to be adjustable, and ease of installation.
In addition, the shape of the tip of the slit nozzle used for coating may affect whether air entrainment or living phenomenon occurs, so it is recommended to test the most suitable one for the viscosity of the coating liquid.
*Including some distributors, etc.
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Consumers Pipe & Supply Co, established in 1965 and based in Fontana, United States of America, is a supplier of pipes, valves, and fittings. The company delivers PVC pipes, forged steel valves, needle valves, cast iron fittings, and carbon steel weld fittings. It also presents manual gear actuators, relief valves, pressure gauges, wedge & sleeve anchors, as well as polypropylene piping systems. It is associated with the American Supply Association, Affiliated Distributors, and Supply Force.
Hewitech GmbH & Co. KG, established in 1993 and headquartered in Ochtrup, North Rhine-Westphalia, Germany, is a manufacturer of plastic installations for cooling towers and wastewater systems. Apart from cooling towers and wastewater systems, the company also produces PP, PVC, and fluoropolymer plastic performance components. These products are also used in humidification systems, special applications in mass transfer for the purpose of gas purification, and bio-trickling filters for a reduction in odor emissions. The company's services include the free use of its design software, support in the design and selection of cooling tower fills, and the re-design of custom-made plastic fills.
Kemper Gmbh, founded in 1977 and headquartered in Vreden, Germany, is a manufacturer of welding fume extraction and occupational health and safety products. The company stocks products like central extraction systems, mobile filter units, and general ventilation systems. It also provides several services, including filter change, maintenance, and air quality measuring. The company is CrefoZert and AOE C certified and has subsidiaries in several countries, including India, Spain, and the Netherlands. It established its first international production site in the Czech Republic in 2000, and this facility generates approximately 450,000 kWh of electricity through solar panels.
Metabo is a company founded in the year 1920 and is based in Nurtingen, Germany as a manufacturer and supplier of professional power tools and cordless accessories. Their product portfolio includes cordless tools, drillers, screwdrivers, semi-stationary tools, bench grinders, and battery packs. They are incorporated with a cordless alliance system. The tools are used for various applications which include cutting, drilling, chiseling, sawing, vacuuming, and extraction. The products are used in multiple industries which include metal trades, construction trades, and renovation.
Kramp Groep, established in 1951 and located in Gelderland, Netherlands, is a manufacturer that specializes in spare parts and accessories for the agricultural industry. The company offers a range of products, including spare parts for agriculture, forest and grass care, earthmoving, and road construction. It also offers batteries and accessories. Its product increases nerve-muscle communication, lifts energy levels, and reloads with electrolytes as well as up to 84 trace minerals. It serves a diverse range of industries, including agriculture, landscaping, forestry, civil engineering, and mechanical engineering.
Milwaukee Tool, established in 1924 and headquartered in Brookfield, Wisconsin, USA, is a manufacturer of heavy-duty power tools, hand tools, and accessories The company offers a wide array of accessories, such as bits, blades, and sockets, to complement their cordless and corded power tools, including hammer drills, saws, and wrenches. Milwaukee Tool's products are utilized by construction workers, mechanics, electricians, and contractors for various tasks, including drilling, sawing, fastening, vehicle repairs, electrical installations, and construction projects.
STEINEL, established in 1959 and headquartered in Germany, is a manufacturer of lighting management, sensor technology, and professional tools. The company specializes in solutions for workspace management and building intelligence. Its products, designed and manufactured in Europe, cater to professional and DIY markets worldwide. From pioneering high-frequency technology to developing sensor-based lighting solutions, its offerings span various sectors, including home, office, and industry. The company’s smart space sensor utilizes infrared matrix technology, AI algorithms, and accurately detects and locates human activity, optimizing energy efficiency in diverse environments.
H.IKEUCHI & Co.,Ltd., founded in 1954 and headquartered in Osaka, Japan, is a manufacturer and supplier specializing in spray nozzles, humidifiers, and related equipment. The company’s product portfolio includes humidifiers, air nozzles, hydraulic spray nozzles, pneumatic spray nozzles, and industrial-use pneumatic humidification systems. These products are utilized by various sectors, including livestock farming, greenhouse agriculture, food processing, textiles, and shipping and maritime. The company is ISO 9001:2015 certified and has offices in the USA, China, Taiwan, Indonesia, and the Netherlands to support its global network.
Pro-Tek inc. was founded in 1982 and is a supplier of paint and body shop equipment products based in Longueuil, Quebec, Canada. The company offers various products such as paint thickness testers, air control units, air dry guns, jetair waterborne drying systems, and HLVP pressure spray. The products are waterborne compatible with stainless steel sets and fluid passages. The products are supplied to the body shop and paint market industries. The company offers warranty for the products for up to 1 year after the purchase.
Ranking as of April 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Milwaukee Tool. |
15.0%
|
| 2 | KEMPER GmbH |
13.1%
|
| 3 | hewitech GmbH & Co.KG |
9.3%
|
| 4 | Consumers Pipe & Supply Co. |
9.3%
|
| 5 | Metabo |
8.4%
|
| 6 | H.IKEUCHI & Co.,Ltd. |
8.4%
|
| 7 | Kramp Groep |
7.5%
|
| 8 | t-s-i.de Misch- und Dosiertechnik GmbH |
7.5%
|
| 9 | STEINEL |
7.5%
|
| 10 | Pro-Tek inc. |
4.7%
|
Derivation Method
The ranking is calculated based on the click share within the slit nozzle page as of April 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Germany
|
4 | 50.0% |
|
United States of America
|
1 | 12.5% |
|
Japan
|
1 | 12.5% |
|
Ukraine
|
1 | 12.5% |
|
Canada
|
1 | 12.5% |
89 products found
89 products
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■Features ・Energy saving by using a blower. ・Excellent chemical resistance and heat resistance due to the use of PPS resin. ■Applications ・Drai...
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The long cover header/slit nozzle can produce a curtain-like pattern by arranging multiple nozzles to cover the width, or by spraying from an orifi...
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Purpose ■Leaf type inner diameter measuring head This is a contact type measuring head that uses a plate spring with carbide balls. Suitable for me...
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