Lechler India Private Limited

Features

• Finest drop particles
• Narrow free cross-sections
• Maximum spray angle: 90°

Wherever a fine, uniform hollow cone is needed, e.g. for cooling and cleaning of gas, absorption processes, dust control, product dampening, oil spraying and air humidifying, axial-flow hollow cone nozzles have proved very efficient. The spiral grooves in the swirl inserts ensure an efficient whirling of the liquid. As a result, the contact surface of the atomized liquid is significantly increased within a remarkably narrow droplet spectrum. This creates extraordinarily favourable conditions for mass transfer.

Lechler full cone nozzles have an extraordinarily uniform liquid distribution over the whole circular impact area. The high precision of distribution is achieved by orienting the liquid inlet to the centre of the swirl chamber of the nozzle.

The optimized x-style swirl insert ensures a high operation safety due to this large free cross-sections. Axial-flow full cone nozzles are available with different spray angles and in many flow rates. Therefore, matching to specific service conditions is possible without any difficulties.

Advantages

• Extremely uniform liquid distribution
• Wide flow rate range
• Large number of available spray angles

As a rule, any flat fan or solid stream nozzle can be operated with air instead of liquid. However, you'll obtain the best results using the nozzle designs we specially engineered for applications of compressed air or saturated steam. For further details, please refer to the next pages.

In addition to air, various nozzle types are also suited for injecting saturated steam. Typical applications of Lechler air nozzles are, for instance, efficient blowing off and blowing out, cooling, drying or cleaning.

Whisperblast® multi-channel air nozzles
Where uncontrolled compressed air is applied, very often annoying, high-frequency hiss noises arise, which may cause serious harm to hearing. These "noises" are produced by turbulences generated at the air outlet. Their intensity depends on the shape of the nozzle orifice and on the air pressure. This means: the better and stronger the air jet is supposed to be, the higher the health-injuring noise level and the higher the air consumption and its cost.

The solution: Lechler multi-channel air nozzles
Featuring a significantly reduced soand level, high blowing power and low air consumption. The performance of multi-channel air nozzles is based on partitioning the air inflow into single air jets. 16 air channels, arranged to ensure optimum flow conditions, provide for a particularly uniform, straight and powerful overall air jet.

In comparison to single-hole air nozzles the advantages are as follows:

• Reduction of the noise level of up to 12 dB
• Low service air pressure with the same blowing power
• Lower air consumption
• Better blowing effect over a long reach
• Lower operating costs

Features

• Coarser droplets than axial-flow hollow cone nozzles
• Large free cross-sections
• Wide spray agles up to: 130°
• Self-cleaning, non-clogging

Eccentric-flow hollow cone nozzles provide a very uniform hollow cone spray thanks to a particular flow geometry. Liquid is put into rotation by an eccentricity arranged liquid inlet. Thereby a very uniform liquid distribution is achieved with spray angles up to 130°. Eccentric-flow hollow cone nozzles are of a self-cleaning design, offering a high operational safety, even at rather poor water conditions. Typical applications for eccentric-flow hollow cone nozzles are: air-humidification in air conditioning systems or gas cleaning in chemical and environmental engineering installations.

Lechler flat fan nozzles stand for uniform liquid and distribution. Particularly high energy jets are generated with spray angles up to 60°. Nozzles with small flow rates are especially suited for humidifying and spraying in general. The flow geometry of the nozzle allows to produce accurate, compact jets, available with different distribution patterns.

Basically, Lechler flat fan nozzles are designed for parabolic liquid distribution. Unaffected by transient pressures, they are suited for universal application. Their performance data are exactly defined. Operational values, such as flow rates, spray width, jet thickness and liquid distribution are readily available for a great variety of feed pressures. There are also special-design nozzles with rectangular or trapezoidal distribution of liquid. Simple and cost-saving fixing attachments, as for instance dove-tail guides and eyelet clamps, considerably facilitate assembling and aligning of the nozzles.

For all cleaning operations, in steelmaking and in many other fields of surface treatment, in short, wherever powerful, uniform water jets are required, Lechler flat fan nozzles constitute a decisive basis for achieving reliable process results.

Pneumatic atomizing nozzles are available in various designs to comply with specific spray and flow requirements:

• Self-aspiration (siphon principle)
• Supply of liquid from a vessel located at a higher level (gravity principle)
• Supply of liquid under pressure (pressure principle)
• Mixing of fluids inside or outside the nozzle
• Full cone or flat fan spray pattern

For many applications, adjustability of liquid flow and, thereby, of the droplet size, is possible with the aid of manually operated accessory components. A pneumatically controlled piston allows to perform automatic or intermittent operations. A number of special customized designs complete the nozzle range.

Criteria for selecting pneumatic atomizing nozzles
Spray pattern
Pneumatic flat fan atomizing nozzles should be chosen for humidifying and cooling of goods, for web dampening and for a number of painting tasks; in short, wherever a braod linear impact is required.

Mode of liquid supply
Whenever liquid can be supplied under pressure, it is recommended to use nozzles functioning by the liquid pressure principle. Use of pneumatic atomizing nozzles operating to the siphon or the gravity principle is recommended when liquid is to be sprayed in small quantities, e.g. for spraying of disinfectants.

Mixing of fluids
The supply of air or gas provides an additional breaking up of the liquid flow into finest drop particles. This supply and mixing can either take place inside or outside the nozzle.

Inside mixing should be preferred, when water, or low viscosity liquids or liquids without solid matter are to be atomized.

Outside mixing is particularly suited for atomizing viscous liquids which are prone to impurities and therefore tend to cause clogging of the nozzle. Low liquid pressures are used with this type of nozzle due to its design.

Thanks to optimum flow geometries, Lechler solid stream nozzles produce compact, transparent solid stream jets of defined lengths. The almost turbulence-free liquid inflow achieves excellent efficiency, even without jet stabilizer inserts. For all cleaning processes, cutting operations and applications requiring perfect, punctiform jet impacts, i. e. whenever the point is to generate concentrated jet power, the precision of Lechler solid stream nozzles enhances productivity and performance of your plant.

Tangential-flow full cone nozzles are, for instance, particularly suited for closed-circuit spraying of liquids with a high quota of solid matter, or for fire fighting applications. The atomizing fluid is tangentially supplied to a swirl chamber, where it is put into rotation.

Tangential-flow full cone nozzles are free of swirl inserts. Hence, they are not at all prone to clogging. The full cone spray is obtained with the aid of specially arranged grooves, milled into the nozzle bottom, which cause an adequate part of the rotating liquid flow to diverge to the center of the swirl chamber. Thereby an extremely uniform area distribution of the sprayed liquid is achieved.

Advantages

• Reliable in service
• Non-clogging
• Stable spray angles, unaffected by transient pressures

Whatever you have to clean, from small containers up to big tanks, Lechler offers for nearly every application a large choice of tank cleaning nozzles. Lechler tank cleaning nozzles work without expensive and defectprone remote drive systems. They are self-rotating and driven by the cleaning fluid. Most types are available in stainless steel as well as in numerous other materials, e.g. PVDF. The ingenious design of the orifices insures a powerful cleaning and low water consumption at the same time.

Advantage

Reduced cleaning time and lower costs. With Lechler tank cleaning nozzles – either as fixed installation for CIP applications or in transportable plant – you solve your cleaning problems economically and lasting.