【Lechler】(Case Study) Quality Control through Humidification (What is a Two-Fluid Spray Nozzle?)

ティックコーポレーション本社

Moisture management for product quality control seems simple but is a challenging application. Particularly with materials like paper, if it becomes too humid, the paper can become soggy, and if it dries out too much, it can crack. The company Lehiller has been continuously improving this seemingly simple issue in collaboration with a certain pulp manufacturer in Europe. Lehiller offers two types of air-assisted spray nozzles: internal mixing and external mixing. A two-fluid nozzle is a special nozzle that can produce finer particles than a single-fluid nozzle by colliding liquid and air. The internal mixing nozzle is designed to break down low-viscosity liquids with few impurities and air inside the nozzle for spraying. The external mixing nozzle, on the other hand, collides liquid and air outside the nozzle tip for spraying, making it particularly suitable for high-viscosity liquids. Additionally, by changing the shape of the nozzle tip, it is possible to create various spray patterns, such as flat spray or full cone (front spray).

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Lechler two-fluid internal/external mixing spray nozzle
We offer a variety of designs for dual-fluid spray nozzles!

Siphon Type Utilizes the suction force generated by the amount of air passing through the nozzle to draw liquid from the tank to the nozzle. By changing the height of the suction, it is possible to alter the flow of the liquid and the size of the particle diameter. This supply method is typically used to finely atomize very small amounts of liquid. Gravity Type Uses gravity to send liquid flow from a high tank to the nozzle. Uniform performance is achieved by maintaining a constant distance between the height of the liquid and the nozzle. Changes in this distance result in variations in flow rate and particle diameter. Pressure (Pressurized) Type Supplies liquid flow to the nozzle based on pressure. The solenoid valve regulates the pressure to achieve various performances. The particle diameter and flow rate are larger compared to the other two liquid supply methods and are dependent on the liquid in relation to air consumption. Two-Fluid Internal Mixing involves the collision and mixing of air and liquid within the nozzle. It is ideal for use with low-viscosity liquids and liquids with few impurities. Two-Fluid External Mixing atomizes the liquid into a mist through the collision of air and liquid after passing through the nozzle orifice. It is optimal for atomizing high-viscosity liquids.
Lechler fine mist cooling spray nozzle
The Lehira company's fine mist cooling spray nozzle is effective with ultra-fine mist spraying.

High-pressure fog nozzle for fine mist (ultra-fine mist) spraying, manufactured by Lehira for mist cooling systems 【Nozzle Basic Information】 Model Number: 2MN Series Spray Angle: 55° / 70° / 85° / 90° / 95° Material: SUS303 Orifice Diameter: 0.15mm / 0.2mm / 0.3mm / 0.4mm / 0.5mm Maximum Pressure: 10MPa (100bar) Connection: 10-24UNC Material: SUS303 【Easy Connection! Basic Information on Easy Pipe】 T-Joint for φ8, Sus304 Easy Pipe for φ8 (available in three lengths: 250mm, 500mm, 1000mm) with knurled finish, Sus304 10-24FD Support, Sus303 End Cap, Brass Plated Pump Power Supply AC100V 50/60Hz Pressure 7MPa Water Intake 1–4 L/min or 2–8 L/min options available