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    Technical Reference Table of Contents

    Technical Reference

    Spray Performance considerations

    Basic Nozzle Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A2

    Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A4

    Specific Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A4

    Spray Angle and Coverage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A5

    Spray Drop Size (Atomization) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A6

    Drop Size Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A6

    Impact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7

    Operating Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A7

    Nozzle Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8

    Nozzle Wear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A8

    Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A9

    Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A9

    Surface Tension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A9

    Summary of Spray Performance Considerations . . . . . . . . . . . . . . . A9

    Estimating Pressure Drops Through Fluidline Accessories . . . . . A10

    Weights, Measurements, formulas

    Volumetric Unit Equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A12

    Liquid Pressure Equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A12

    Linear Unit Equivalents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A12

    Miscellaneous Equivalents and Formulas . . . . . . . . . . . . . . . . . . . . A12

    Phone 1-800-95-spray, FAX 1-888-95-spray Visit Our Web Site: www.spray.com, Email: [email protected]

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    Spray Performance Considerations

    Basic Nozzle Characteristics Spray nozzles are precision components designed to yield very specific performance under specific conditions. To help you determine the best nozzle type for your application, the following reference chart summarizes the performance that each nozzle type is designed to deliver. Contact your local Spraying Systems Co. sales engineer for more detailed technical bulletins or a no-obligation consultation.

    Full Cone Spray pattern:

    General Spray Characteristics

    Utilizes an internal vane to provide a uniform, round, full spray pattern with medium-to-large sized drops.

    Comments

    Provides full spray pattern coverage with medium-to-large flow rates. Some vaneless models and oval spray models are also available.

    Spray angles: 15° to 125°

    Comments

    Larger capacities can be used to flush or clean tube and pipe interiors and small tanks.

    Spray pattern:

    Spray angles: 100° to 180°

    General Spray Characteristics

    Utilizes a deflector cap to form an “umbrella” shaped hollow cone pattern.

    Hollow Cone (Deflected-Type)

    Comments

    The extensive range of capacities and drop sizes makes the hollow cone nozzle useful for a variety of applications where a combination of small drop size and capacity is required.

    Spray angles: 40° to 165°

    Spray pattern:

    General Spray Characteristics

    Available in a wide range of capacities and drop sizes. Provides a good interface between air and drop surfaces.

    Hollow Cone (Whirlchamber-Type)

    Comments

    Provides high flow rate in a compact nozzle size. The one- piece design features maximum throughput for a given pipe size.

    Hollow Cone (Spiral-Type)

    General Spray Characteristics

    Provides a hollow cone pattern with drops that are slightly coarser than those in other hollow cone sprays.

    Spray pattern:

    Spray angles: 50° to 180°

    Comments

    Spray coverage is not as uniform as that from conventional internal vane-type nozzles. Provides high flow rates in a compact nozzle size.

    Full Cone (Spiral-Type)

    General Spray Characteristics

    Provides relatively coarse drops in a full cone pattern with minimal flow obstruction. Spray angles:

    50° to 170°

    Spray pattern:

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    Spray Performance Considerations

    comments

    Used to produce finely atomized sprays when compressed air is not desirable.

    Spray pattern:

    General Spray characteristics

    A hydraulic, finely atomized, low capacity spray in a hollow cone pattern. Spray angles:

    35° to 165°

    Atomizing (Hydraulic, Fine Mist)

    comments

    The thin rectangular pattern of this nozzle provides uniform coverage. In manifold set-ups, the nozzles are carefully positioned for edge-to-edge pattern contact. Designed primarily for high-impact applications.

    Spray pattern:Flat (Even)

    General Spray characteristics

    Provides even distribution throughout the entire flat spray pattern. Produces medium-sized drops. Ideal where high and uniform spray impact is required.

    Spray angles: 25° to 65°

    comments

    Large free passage design through the round orifice reduces clogging. Narrow spray angles provide higher impact, while the wide-angle versions produce a lower impact.

    Spray pattern:

    Spray angles: 15° to 150°

    General Spray characteristics

    Produces a relatively even flat spray pattern of medium-sized drops. The spray pattern is formed by liquid flowing over the deflector surface from a round orifice.

    Flat Spray (Deflected-Type)

    comments

    Designed to be used on a spray manifold or header for uniform, overall coverage across the impact area.

    Spray pattern:Flat Spray (Tapered)

    General Spray characteristics

    A tapered-edge flat spray pattern nozzle is usually installed on a header to provide uniform coverage over the entire swath as a result of overlapping distributions.

    Spray angles: 15° to 110°

    Spray pattern:

    comments

    Ideal wherever a very high spray impact is required.

    Spray angles: 0°

    General Spray characteristics

    Solid stream nozzles provide the highest impact per unit area.

    Solid Stream

    Cone and flat spray patterns

    comments

    The most widely used nozzle group for producing finely atomized sprays in a wide range of capacities.

    Spray pattern:Air Atomizing and Air Assisted

    General Spray characteristics

    Atomization produced by a combination of air and liquid pressures. Air assisted nozzles feature internal impingement atomization to assist fine drop formation.

    Phone 1-800-95-spray, FAX 1-888-95-spray Visit Our Web Site: www.spray.com, Email: [email protected]

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    Q 1 =

    (P 1 )n

    Q 2

    (P 2 )n

    Capacity Factors for Specific Nozzle Types

    Nozzle Type Exponent “n”

    Hollow Cone Nozzles (All) Full Cone Nozzles (Vaneless) Full Cone Nozzles (15° and 30° Series) Flat Spray Nozzles (All) Solid Stream Nozzles (All) Spiral Nozzles (All)

    .50

    Full Cone Nozzles (Standard) Full Cone Nozzles (Square Spray) Full Cone Nozzles (Oval Spray) Full Cone Nozzles (Large Capacity)

    .46

    Full Cone Nozzles (Wide Spray) Full Cone Nozzles (Wide Square Spray) .44

    All capacity tabulations in this catalog are based on water. Since the specific gravity of a liquid affects its flow rate, tabulated catalog capacities must be multiplied by the conversion factor that applies to the specific gravity of the liquid being sprayed as explained in the Specific Gravity section below.

    Capacity Nozzle Capacity Varies with Spraying Pressure. In general, the relationship between flow rate and pressure is as follows:

    Q: Flow rate (in gpm or l/min) P: Liquid pressure (in psi or bar) n: Exponent applying to the specific nozzle type

    Spray Performance Considerations

    KEY: Conversion factor multiplied by the capacity of the nozzle when spraying water gives the capacity of the nozzle when spraying a liquid with a s