Hollow cone spray nozzles
The hollow cone spray nozzle is used when the volume flow needs to be concentrated to the outer part of the spray cone or when there is a need for relatively smaller droplets in a processes compared to a full cone nozzle.
There are various types of hollow cone nozzles - axial and tangential nozzles, as well as spiral nozzles.
CW
- 0.355 - 8.07 l/min
- 80° - 120°
- Interchangeable spray tip
- Integrated filter optional
- Axial hollow cone nozzle
DTH
- Used in flue gas desulphurisation applications
- Silicon Nitrade Bonded Silicon Carbide (SNBSC)
- Tangential (double) hollow cone nozzle
EZTF
- 1.87 - 221 l/min
- 60° - 180°
- Snap release spray nozzle system
- Fine atomisation
- Wide range of different spray angles
- Spiral hollow cone nozzle
EZWT
- 0.134 - 23.9 l/min
- 70° - 110°
- Snap release spray nozzle system
- Tangential hollow cone nozzle
NCJ
- 19.3 - 9820 l/min
- 15° - 30°
- High impact, high velocity spray
- Axial hollow cone nozzle
SF Hollow Cone
- 2.42 - 72.1 l/min
- 50° - 90°
- Snap release spray nozzle system
Spillback
- 70° - 90°
- 0.9 - 410 l/min
- Uniform droplet size over the entire flow range
- Axial hollow cone nozzle
TD/TDK
- 0.564 - 139 l/min
- 50° - 85°
- Used for Spray Drying
- Axial hollow cone nozzle
TDL
- 0.18 - 7.76 l/min
- 70°
- Used for Spray Drying
- Low flow rates
- Axial hollow cone nozzle
TF Hollow Cone
- 1.87 - 14000 l/min
- 50° - 180°
- Fine atomisation
- Wide selection of spray angles and flow rates
- Spiral hollow cone nozzle
TH
- 15.6 - 3390 l/min
- 54° - 95°
- Large free passage
- Tangential hollow cone nozzle
THW
- 15.6 - 3390 l/min
- 100° - 120°
- Large free passage
- Tangential hollow cone nozzle
WT
- 0.134 - 143 l/min
- 70° - 125°
- Large free passage
- Tangential hollow cone nozzle
WTX
- 0.134 - 143 l/min
- 70° - 125°
- Large free passage
- Very durable
- Tangential hollow cone nozzle
Various types of hollow cone nozzles
Hollow cone nozzles create relatively smaller droplets compared to full cone nozzles, which can be useful in for example gas cooling processes. There are three types of hollow-cone nozzles - axial, tangential and spiral nozzles.
Spiral hollow cone nozzle
- The spray pattern is created by the liquid shearing along the spiral, forming a concentric cone.
- The spray is concentrated to the perimeter of the spray cone, which consists of relatively large droplets, whilst a fine mist is created within the cone.
Axial hollow cone nozzle
- Spray exits on the same axis it enters
- Internal disc or vane causes the liquid to spin, and the centrifugal force exerted upon the geometry of the exit creates the spray pattern.
- Spray is concentrated on outer edges of the cone.
- Relatively small droplets compared to axial full cone nozzles.
- Large free passage
Tangential hollow cone nozzle
- Spray exits 90° from the entry axis
- Internal geometry creates the spray pattern by the liquid swirling around the body cavity before exiting the orifice.
- Spray is concentrated on outer edges of the cone.
- Relatively small droplets compared to tangential full cone nozzles.
- Large free passage
Choose the right spray nozzle for an optimised spray process
Each type of spray nozzle has a specific flow rate, spray pattern and droplet size. To optimise the spray process, it is important to understand how different parameters affect the choice of spray nozzle and solution.
- What is the function of the spray nozzle and the spray process?Read the full answer
The first step when choosing the right spray nozzle is to define the function and application of the spray process, such as cooling a gas, washing a tank or flushing a conveyor belt. Type of spray nozzle, thus also spray pattern and droplet size, are important to consider in order to optimise the spray process.
- Which droplet size is most suitable for the spray process?Read the full answer
Droplet size is often critical in optimising a spray process. Many processes, such as gas cooling and gas scrubbing, depend on exposing the maximum total liquid surface area. The liquid then needs to be distributed in a large number of small droplets to create as much total surface area as possible. Other spray processes ...
- What surface should the spray cover? How should the nozzle be positioned?Read the full answer
The position of the nozzle over the target (D) and the area to be covered by the spray (B) are important to know in order to choose the right spray angle (A). The spray angle is measured near the nozzle orifice and the droplets are immediately affected by external forces such as gravity, air and gas flow.
- Desired flow rate? Available pressure?Read the full answer
Desired volume flow depends on the specific spray process. Most spray processes have general rules of thumb for flow ranges, but in many cases on-site testing is needed to achieve the right results.
- What type of liquid is used in the spray process?Read the full answer
A liquid's specific gravity, viscosity and the presence of particles affect the spray characteristics of the nozzle.
- Are there external factors affecting the nozzle spray?Read the full answer
Sometimes the spray is affected by external forces such as process gas flows, air flows or wind.
- Which material is most suitable for the spray process?Read the full answer
Listed below are a number of factors that should be considered when selecting materials for a specific nozzle. An incorrect choice of material is likely to affect the performance and life of the nozzle. We are happy to help and advise on which material is most suitable in your ...
- What are the benefits of an optimised spray process?Read the full answer
There are many factors to consider when selecting a nozzle for a specific spray process. An optimised spray process can make a big difference, contributing to: improved product and process quality increased production and reduced time for unplanned stops reduced maintenance costs lower operating costs by reducing the use of ...
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FAQ Spray nozzles & systems
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