Actual drop size (measured in microns) will vary based on flow rate and pressure. The _**“relative”**_ drop size range represents the variation in drop size across typical operating pressures for a particular nozzle.
> _If drop size is critical to your application, contact us for specific information. For basic information on drop size terminology, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Relative Drop Size Range

Actual drop size (measured in microns) will vary based on flow rate and pressure. The _**“relative”**_ drop size range represents the variation in drop size across typical operating pressures for a particular nozzle.

The drop size ranges provided can be characterized as follows:
- 10 to 500 microns: very small drops
(comparable to fog)
- 100 to 500 microns: small drops
(comparable to light rain)
- 500 to 1000 microns: medium drops
(comparable to moderate rain)
- 1000 to 5000 microns: large drops
(comparable to heavy rain)

> _If drop size is critical to your application, contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

> _For basic information on drop size terminology, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Relative Drop Size Group

The volume of liquid passing through a nozzle (also called the nozzle’s capacity) is typically measured in gallons per minute or liters per minute. Flow rate is affected by liquid pressure and other factors, including the specific gravity and viscosity of the liquid being sprayed.
> _For more information on liquid flow rate or nozzle capacity, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Liquid Flow Rate

Mesh size relates to the particle size that will be filtered by a strainer. Because the purpose of a liquid strainer is to prevent nozzle plugging it’s important to choose a mesh size that will screen out particulates larger than the nozzle’s orifice will allow to pass.
> _For help selecting the right strainer mesh size for your application, contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Strainer Screen Mesh Size

Estimated Ready to Ship

The range of operating pressures published in our catalog. 
> _The catalog offers flow data only for selected operating pressures. Certain nozzles may be able to operate outside the pressure range shown in the catalog. Consult your local Spraying Systems Co. representative to ensure safe operation._

Liquid Pressure Range

The range of flow (typically measured in gallons per minute or liters per minute) published in our catalog for a given nozzle. 
> _The catalog offers flow rates only for selected operating pressures so greater flow may be possible at pressures not shown in the catalog._

Liquid Flow Rate Range

GunJet spray guns are available for a wide range of operating pressures. The maximum operating pressure for any Low Pressure GunJet spray gun is 250 psi (17 bar). The maximum operating pressure for any Medium Pressure GunJet spray gun is 1000 psi (69 bar). The maximum operating pressure for any High Pressure GunJet spray gun is 4000 psi (275 bar). Be sure to check the specifications for each GunJet spray gun carefully and follow all safety guidelines.

Pressure Group

The operating pressure as published in our catalog.

> _For more information on how liquid pressure affects spray performance, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Liquid Pressure

The spray angles produced by nozzles vary from 0° for solid stream nozzles up to 180° for select hollow cone nozzles. For ease of product searching, our catalog groups spray angles into “narrow” (typically < 50°), “standard” (50°-100°) and “wide” (> 100°).
> _**Important Note:** Spray angle range for each of the basic spray patterns (flat spray, full cone, hollow cone) varies, so Spray Angle Catalog Group is most useful when searching for nozzles within a single spray pattern._

Spray Angle Catalog Code

Spray nozzles are manufactured from a wide variety of materials that have been determined to meet the usual requirements of the applications most commonly associated with that type of nozzle. Standard materials include brass, steel, various stainless steels, hardened stainless steels, many plastics and various carbides. Spray nozzles can also be supplied in other materials upon special request. Materials of construction affect nozzle wear life and resistance to corrosion and abrasion.
> _For more information on nozzle materials, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Materials

Many hydraulic spray nozzles include a numeric capacity size in the part number. Capacity size is often related to the flow rate of the nozzle at the rated spray pressure for that nozzle. For example, the capacity size for a 1/4HH10 FullJet® nozzle is “10”, which reflects a 1.0 gpm flow rate at 10 psi.

Capacity Size

Our products are grouped into these primary product types:
- Nozzle - Body _(a nozzle body without a spray tip)_
- Tip _(a spray tip without a nozzle body)_
- Assembly _(a complete nozzle assembly including both a nozzle body and a spray tip)_

Product Type

Specific gravity is the ratio of the density of a fluid compared to the density of water. It must be considered to properly calculate flow rate. 

 **Alternatively**, if you don't know the specific gravity you may select the **Liquid Type** from a list of commonly-sprayed liquids and temperatures.

### Liquid Type

 The type of liquid sprayed and its temperature affects the specific gravity of the liquid and in turn affects the flow rate. The default liquid is water, with a specific gravity of 1. 

> _For more information on how specific gravity and other characteristics such as temperature, viscosity and surface tension affect spray performance, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Specific Gravity

The angle of the spray pattern as it emerges from the nozzle orifice, measured in degrees. Narrower spray angles provide less coverage of the sprayed surface. Wider spray angles provide greater coverage of the sprayed surface. Solid stream nozzles have a 0° spray angle.
> _For more information on spray performance characteristics including spray angle and spray coverage, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Spray Angle

Different nozzle types are _**“rated”**_ at various pressures, depending on the function of the nozzle and the pressure at which a spray pattern is fully formed. The angle of the spray pattern as it emerges from the nozzle, when spraying at the rated pressure orifice, can serve as a reference point for comparing different nozzles.

Spray Angle at Rated Pressure

Spray Angle Range

Most nozzles are available with NPT or BSPT connections. Other threaded connections are available on select nozzles and additional connection types, such as flange and quick-connect, are also common. Some nozzles are also available with sanitary connections.

Inlet Connection Type

Model

We offer the _**“brand”**_ filter as a convenience because many Spraying Systems Co. nozzle brand names are recognized by customers around the world, such as VeeJet® flat spray nozzles and FullJet® full cone nozzles. Most of our nozzle brands are registered trademarks in the United States and in other countries around the world.

Brand

A nozzle’s spray pattern is the shape the liquid forms after it emerges from the orifice. Nozzles are precision engineered to produce specific spray patterns such as full cone, flat spray, hollow cone and solid stream patterns. Different spray patterns are useful for different types of spray operations.
> _For more information about typical applications for various spray patterns, download our [technical reference document](https://spray.widen.net/download/spray/oeafrrites/cat75HYD_us_Tech-Reference_A.pdf) or contact your [local Spraying Systems Co. sales rep](https://www.spray.com/contact/find-a-representative)._

Spray Pattern

UniJet® High Pressure Nozzle, Hardened Stainless Steel

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QuickMist® Quick Connect Air Atomizing Nozzles

Electrically-Actuated / Hydraulic Atomizing

Throttling and Pressure Relief/Regulating Valves

SprayFinder®

Operating Conditions

Model

Strainer Screen Mesh Size

Capacity Size

UniJet® Solid Stream Nozzles