uniform cross distribution of double flat spray nozzles

Uniform cross distribution of double flat spray nozzles may be affected

by the design of the sprayer

4th European workshop on Standardized Procedure for the inspection of Sprayers in

Europe – Spise 4

R. Heinkel, E. Herbst

Uniform cross distribution of double flat spray

nozzles may be affected by the design of the sprayer

Outline

� Introduction

� Problematic areas

� Approval

� Measurements and results

� Scanner patternator� Scanner patternator

� Conclusion

Introduction

Directive

According to EU Directive 2009/128/EC pesticide equipment must

function reliably and be used properly for its intended purpose

ensuring that pesticides can be accurately dosed and distributed.

Problem

Double flat fan air induction nozzles are popular and in the meantime

well accepted by farmers. Their main characteristic is based on a

second spray level with mainly symmetric set up.

DF IDKT

TwinSpray

Cap

Introduction

EN 13790 Inspection of sprayers in use – Part 1

4.8.6

Regardless of the distance of the boom above the ground, no liquid

shall be sprayed on the sprayer itself.

Kind of mounting of the boom on a tower compared to a parallelogram

Problematic areas

With low and mid boom height

it‘s ok!

Sprayer frame of mounted sprayer

Holder AS-4, 10 m boom equipped with IDKT 120-04C

Problematic areas

Problematic areas

Sprayer frame of mounted sprayer

Holder AS-4, 10 m boom equipped with IDKT 120-04C

Tyres of trailed sprayer

Schmotzer sprayer, boom equipped with IDKT 120-04C

Problematic areas

Problematic areas

Standard EN 13790 Part 1

4.8.6

Regardless of the distance of the boom above the ground, no liquid

shall be sprayed on to the sprayer itself. This does not apply if

needed by function and if dripping is minimised

Source: JKI

Approval

EN 13790 Inspection of sprayers in use – Part 1

4.9.1

All nozzles shall be identical (type, size, material and origin) all along

the boom, except where they are intended for a special function for

example the end nozzles for border spraying.

JKI approval (20th of March 2012)

� same pressure setting

� same drift reduction (Germany)

Boom Boom middle section

G 1932 IDKT 120-03 POM 6 x IDKN 120-03 POM

G 1933 IDKT 120-04 POM 6 x IDKN 120-04 POM

G 1934 IDKT 120-05 POM 6 x IDK 120-05 POM

Approval

Advantages

Mixed mounting in the middle section:

� no negative effect on cross distribution

� easy to do

� cheap

Cross distribution (cv) of new nozzles

IDKT 120-04 C IDKN 120-04

Cross distribution

IDKT and IDKN nozzles in the middle section

New nozzles (Lechler patternator)

CV %

2,0 bar 4,0 bar

Spray height IDKT IDKN IDKT IDKN

500 mm 2,1 2,7 1,7 3,0

Holder ES-4, 12m boom (nozzles in use)Boom: IDKT 120-04C, 3,0 bar

Cross distribution


cv 8,86%

Cross distribution


IDKN 120-04 in the middle segment of the boom

Holder ES-4, 12m boom (nozzles in use)Lateral boom: IDKT 120-04C, 3,0 bar

Middle segment of the boom: 4 x IDKN 120-04, 3,0 bar

Cross distribution


� Improved cross

distribtuion

� cv 2,6% better

cv 6,26%

Measurement of cross distribution with Scanner

Actual situation

� Most scanner patternators in use are 1,50 m in depth

� At 0,5m spray height opening in-between the spray jets is around

0,6 m

� Exact reverse to bring boom into parallel position along the track is

necessary necessary

Measurement of cross distribution with Scanner

New scanner patternator with 2,00 m in depth

� Upgrade on current Herbst model of 1,50 m patternator

� Modification takes 2 min

� Handling with big booms is much easier

� Spray of both jets is catched easily

Summary

� According to EU Directive 2009/128/EC and EN 13790 no liquid shall

be sprayed on the sprayer itself.

� Double flat fan nozzles may splash on sprayer frame

� Mixed mounting of IDKT and IDK / IDKN is favourable when technical

modifications on the sprayer are not possible or causes high expenses

Uniform cross distribution of double flat spray

nozzles may be affected by the design of the sprayer

modifications on the sprayer are not possible or causes high expenses

• easy to do

• cheap

• no negative effect on cross distribution

� Herbst scanner patternator with 2m depth is available for refitting in

order to catch complete spray jets of double flat fan nozzles

� Standards in revision, such as ISO 16119 and 16122, are amended

with respect to enable mixed mounting of nozzles in special situations

Uniform cross distribution of double flat spray nozzles may be affected

by the design of the sprayer

Thank you very much for

your attention

4th European workshop on StandardizedProcedure for the inspection of Sprayers in

Europe – Spise 4

R. Heinkel, E. Herbst

uniform cross distribution of double flat spray nozzles

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