- Static: Static spray balls do not rotate and therefore require considerably more fluid. They are used primarily for rinsing tanks. They are inexpensive to purchase and are very robust (trouble-free).
- Free-Spinning: The cleaning fluid drives the spray head by means of specially positioned orifices. The rapidly repeated impact removes the soil and rinses it from the tank surface. This results in optimum cleaning efficiency at low pressures in small to medium-sized tanks.
- Controlled Rotation: The rotating head is driven by the fluid. A turbine wheel with an internal gear is used to control the rotation. This ensures that the speed remains in the optimum range even at higher pressures. The droplets produced are larger and strike the tank wall at higher speed. These rotating cleaning nozzles achieve an even higher impact which is especially important for large tanks.
- Gear-Controlled: The cleaning fluid drives an internal gear by means of a turbine wheel so that the spray head rotates by two axes. The solid jet nozzles mounted on the spray head produce powerful jets. These jets sweep the entire tank surface in a pre-programmed, modelspecific pattern during a spray cycle. This requires a certain minimum time. These models generate the highest impact and are therefore ideal for very large tanks and the toughest cleaning tasks.
Lechler offers various options for connecting the rotating cleaning nozzles to the supply line:
- Threaded Connection: Most nozzles have a female thread that is screwed onto a male thread on the pipe.
- Slip-On Connection: Slip-on connections without threads are often preferred in applications with high sanitary requirements. Here, the nozzle is slipped onto the outer pipe and secured through a horizontal hole by a pin or clamp.
- Tti-Clamp: Tri-Clamp fittings are frequently used in the food and beverage industry. Some rotating cleaning nozzles can be supplied with a compatible adapter.
- Welded Connection: Welded connections are particularly suitable for applications where sanitary requirements have to be taken into account. Please contact us for further information.
Lechler tank and equipment cleaning nozzles are made of extremely high-grade materials that are designed to meet requirements such as resistance to cleaning chemicals or temperature influences. The large choice of different materials — e.g. stainless steel AISI 316L, PVDF, PEEK or PTFE — allows nozzle selection customized to the individual application and operating conditions. In addition, the materials used for the tank and equipment cleaning nozzles are perfectly matched to each other and are thus characterized by very low wear.
The product pages for the individual nozzles provide information on the materials available for the different nozzle types.
In addition to the requirements for material resistance and wear, the materials must also be food grade for use in the beverage, food and pharmaceutical industries. Depending on the application area, the materials must meet different demands.
A large number of the materials used for Lechler tank and equipment cleaning nozzles comply with the requirements of the FDA or conform to (EC) 1935/2004.
Further information on conformity is provided on the product pages.
The FDA, the U.S. Food & Drug Administration, is a federal agency which overseas those two industries. Materials used in making Some of Lechler’s products comply with the requirements of FDA regulation 21 CFR for use in food applications.
The regulation (EC) No. 1935/ 2004 of the European Parliament regulates general safety requirements to all food and beverage contact materials.
Within this regulation, it is additionally stipulated that plastics must comply with (EU) 10/2011.
Lechler’s tank and equipment cleaning nozzles are designed so that they meet hygiene requirements.
This is reflected, for example, in the self-draining function, minimized dead space in the nozzles as well as an external design without unnecessary gaps and edges. At the same time, the nozzles are designed with the lowest possible surface roughness.
Lechler also offers specially certified nozzles for particular hygiene requirements. For example, the “PTFE Whirly” and 527 series are 3A-certified.
3-A® Sanitary Symbol Council Administrative Council for Spray Cleaning Devices (78-01) 3-A® SSI is an independent, not-for-profit corporation dedicated to advancing hygienic equipment design for the food, beverage, and pharmaceutical industries. The display of the 3-A symbol requires that processing equipment meets certain material, design, and fabrication standards for cleanability and inspection.
Nozzle wear depends mainly on the operating conditions. Like with all rotating parts, the bearing assembly is subjected to the highest amount of stress. The following operating conditions accelerate wear:
- Solids in the fluid and hard particles
- Use in a chemically aggressive environment
- Spraying of chemically aggressive substances
- Operating the nozzle above the recommended pressure range or temperature
Material certificates in accordance with DIN EN 10204 can be issued on request for almost all Lechler tank and equipment cleaning nozzles.
Lechler offers specially designed nozzle series for use in explosive atmospheres. The “MicroWhirly” and “Whirly” series have an ATEX approval that was issued by an external certification institute.