Spray drift comprises small, wind borne droplets of pesticide carried away from the intended target area and into the environment. Research has shown that spray drift accounts for up to 20% of pesticides being released into the environment and these pesticides are contained in droplets less than 100µm in diameter.

Features of Enviroguard®  110°/80° Nozzles

• Helps reduce environmental impact by reducing the percentage volume of driftable droplets, minimising off-target spray contamination.
• Precision moulded in polyacetal, a highly stable polymeric material with wear characteristics unrivalled by traditional materials
• High level of quality control throught the manufacturing process ensures consistent compliance with specification
• Colour coded (in accordance with ISO/DIS 10625) for quick indentification of flow rate
• Compatible with most standard nozzle caps
• BCPC (British Crop Protection Council) coded to assist with correct nozzle selection
• Unique key supplied for removal of primary orifice to assist cleaning

see larger image

Description
The design comprises a conventional flat fan discharge orifice with the addition of a primary orifice inserted in front to provide an intermediate pressure drop. This results in the formation of coarser spray droplets at standard spray pressures, thus reducing the percentrage of drift prone droplets below 103µm, therefore reducing the percentage of pesticide available for transmission to non target areas. Rated at 3 bar presure, and in two spray angles of 80° and 110°, these nozzles produce a narrow elliptical spray pattern. Individually they produce a triangular (normal) shaped distribution but boom mounted at 0.5m spacing provides 50% overlap to give an overall even distribution. A key is provided to enable the primary orifice to be removed for cleaning.

Applications
The Enviroguard® nozzles are used for broadcast application of pre and post emergent herbicides.

Installation
To ensure uniform target coverage the boom height must be correctly adjusted in relation to the target and for the nozzle spacing used on the boom. The figures shown below will provide a 50% overlap ensuring an overall even distribution. Note that the height is measured from the nozzle to the target whether it be soil or vegetation.  Always take into account the height of the vegetation. Ideally the nozzles should be offset by approximately 5°. Check for evenness of spray distribution at target level under the boom. This is best achieved by spraying out water onto dry concrete and watching it dry out. If it tends to dry in stripes, then this indicates that the boom is possibly too low. Adjust boom height slightly above rather than below the figures states, since under field conditions, boom bounce can dramatically alter the nozzle height. However, it is wise to avoid excessive boom heights since this will increase potential spray drift.

Application Rates
For application rates of the Enviroguard® nozzle in metric, imperial and USA, please go to Enviroguard Application Rates - Imperial - Metric - USA

Filtration
For the different types of filters available for the nozzles, please click go to Filters

General Information
For information about the selection, maintenance, filtration for nozzles and safety, please go to Nozzle Information