Netafim TECHLINE AS Design Manual
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Netafim TECHLINE AS Design Manual

Netafim TECHLINE AS Design Manual

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TECHLINE AS™
DESIGN GUIDE
A complete guide for the design of on-surface and sub-surface drip
irrigation systems using Techline AS™.

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Summary of Contents for Netafim TECHLINE AS

  • Page 1 TECHLINE AS™ DESIGN GUIDE A complete guide for the design of on-surface and sub-surface drip irrigation systems using Techline AS™.

  • Page 2: Table Of Contents

    “GRID” Layouts “LITE” Layouts What Do These Layouts Have In Common Standard “GRID” Layout Standard “LITE” Layout How To Calculate Equal Techline AS™ Row Spacing Length of Techline AS™ Rows Centre Feed “GRID” Layouts Other “GRID” Considerations Mainline Sizing Submain Sizing Zone Water Requirements Techline AS™...
  • Page 3 Formula 1.2 Application Rate Formula 1.3 Number Of Drippers In A Zone Formula 1.4 Flow Per Zone Formula 1.5 Estimated Total Zone Flow CALCULATING TECHLINE AS™ RUN TIMES TECHLINE AS™ INSTALLATION GUIDE Specifications System Maintenance Techline AS™ System Inspection Checklist Techline AS™...

  • Page 4: Introduction

    T E C H L I N E A S ™ D E S I G N G U I D E INTRODUCTION: This manual has been prepared to assist with the correct use of Techline AS™ for irrigation projects that are either On-Surface Drip Irrigation (OSDI) for garden areas or Sub-surface Drip Irrigation (SDI) for turf areas.

  • Page 5: What Is Techline As

     Large centrally mounted drip inlet filter – prevents sediment entering the drip inlet  Mechanical root barrier – coupled with a Netafim Techfilter offers the best protection against root intrusion in sub-surface drip systems.  UV resistant dripperline – designed for trouble free operation.

  • Page 6: Applications

    Pressure compensating range: 40kPa to 250kPa.  Anti-siphon Mechanism: prevents “suck-back”.  Maximum Operating Pressure: 250kPa.  Recommended Filtration: 120 mesh (130 micron)  Dripperline inside diameter (I.D.): 12.9mm  Dripperline outside diameter (O.D.): 15.3mm TECHNICAL DATA: NETAFIM @BCL@C40BDC65.doc 21/12/2009...

  • Page 7: Design Criteria

    T E C H L I N E A S ™ D E S I G N G U I D E DESIGN CRITERIA:  Designing with Techline AS™ follows the same basic rules as designing with sprays and rotors. ...

  • Page 8: Which Techline As™ Product Should You Use

    2. The corresponding application rates and time to apply are listed under the “Lateral Spacing” line. (With rows of 1.6L/H Techline AS™ every 0.4m apart, the application rate is 10mm per hour and so it will take 60 minutes to apply 10mm of water. If the rows are 0.5m apart, the application rate is 8.0mm per hour and will take 75...

  • Page 9: Types Of Layouts

     This is the preferred method for installing Techline AS™ sub-surface.  This method uses supply and collecting manifolds with rows of Techline AS™ connected at each end.  The Supply Manifold delivers water to each row of Techline AS™.

  • Page 10: Standard "Grid" Layout

    (Zone Water Requirement calculations are on page 10).  Start rows of Techline AS™ 50mm – 100mm away from the edge of hard scapes, and move across the area with equal row spacing that does not exceed the recommendations of Table 1.

  • Page 11: Length Of Techline As™Rows

    The chart also determines what the operating pressure of the zone needs to be. Example – If you have a 130m lateral of 1.6L/H @ 0.4m Techline AS™, it will need 200 kPa to operate properly. If it is from 130m – 143m long, it will need 250kPa. Note: We will discuss how to regulate pressure on page.18.

  • Page 12: Other Grid Considerations

    Table 2.  A range of start connectors are available to connect Techline AS™ to PVC, HDPE and LDPE Poly Pipe. Straight start connectors are suitable for areas where the laterals are running off perpendicular to manifolds. In odd shaped areas elbow start connectors are available so that even/parallel lateral spacing can be achieved.

  • Page 13: Mainline Sizing

    Multiply 1.5m (15kPa) loss by 0.43 to determine that the submain loss is 0.645m (6.45kPa). ZONE WATER REQUIREMENTS:  Once Techline AS™ is laid out, we need to identify the total zone flow. This will help to determine mainline, submain as well as feed and collection manifold sizing, valve, filter and pressure regulator selection.
  • Page 14 T E C H L I N E A S ™ D E S I G N G U I D E  Method 3: Multiply System Application rate by Total Area. NETAFIM @BCL@C40BDC65.doc 21/12/2009...

  • Page 15: Fittings

    T E C H L I N E A S ™ D E S I G N G U I D E FITTINGS: When laying out Techline AS™ you will need to use fittings to connect Techline AS™ to the feed and collecting manifolds. Start connectors are available in straight and elbow configurations.

  • Page 16: Line Flushing Valves

    Manual Flushing Valve should be located at the midpoint of a LITE layout.  Allow 1 second per metre of dripperline & poly pipe in the zone for as a general guide for an adequate flush time. NETAFIM @BCL@C40BDC65.doc 21/12/2009...
  • Page 17 All Air/Vacuum Relief Valves should be installed in a valve box with a gravel sump. This will ensure that the only clean air will enter the drip system. Note: Larger Air Release valves are available for large projects. NETAFIM @BCL@C40BDC65.doc 21/12/2009...

  • Page 18: Filters

    Then select the correct pressure rating based on the following: 1. If you used the “Maximum Length of a Single Techline AS™” chart, (Table 2) match the PRV to the same pressure rating you used for your maximum lateral length calculation, 2.

  • Page 19: Pressure & Flow Checks

    Pressure Reduction Range: 11m, 14m, 18m, 20m, 25m & 30m PRESSURE & FLOW CHECKS:  One of the best means of ensuring a Techline AS™ zone is operating properly is to test the pressure at regular intervals.  By taking and recording the pressure while the zone is running, you can ensure that the zone is working as installed.

  • Page 20: Slopes And Mounds

    T E C H L I N E A S ™ D E S I G N G U I D E SLOPES AND MOUNDS: Techline AS™ has a self regulating dripper with an anti-siphon device built into it which will ensure that it will perform reliably on sites with slopes or mounds. When the drip systems shuts down however remaining water inside Techline AS™...

  • Page 21: Techline As™ In Turf (Sdi)

     Always use the GRID layout for SDI systems.  Techline AS™ can be laid on top of a level surface and have topsoil applied to it at a uniform depth.  Techline AS™ can also be inserted into the ground with a plough. Again ensure that it is installed at a uniform depth.

  • Page 22: Techfilter (Spu)

    Install the Techfilter in a valve box enclosure that allows easy access to enable cartridge replacement.  An ARI RP500 Back-flow device must be installed on all systems which are connected to potable (mains/scheme) water supplies. Check with your local water authority regarding appropriate back-flow selection and installation. NETAFIM @BCL@C40BDC65.doc 21/12/2009...
  • Page 23 TECHLINE AS PURPLE (BIOLINE AS™) FOR WATER RE-USE: Techline AS™ Purple conforms to Australian and New Zealand Standards and is suitable for use with recycled or treated waste water. The use of treated waste water in public areas is subjected to strict health department guidelines where concern has been raised due to the possible contact between surface water and air borne pathogens with human contact.

  • Page 24: Techline As™ Design Formulas

    Dripper Flow Rate = Litres per Hour Flow of One Dripper Dripper Spacing = Spacing in Metres of Drippers Inside Tubing Dripperline Row Spacing = Metres Between Techline AS™ Laterals (Rows) Example: Drip Discharge Rate of 1.6L/H, Drip Spacing of 0.4m and Dripperline Row Spacing of 0.5m.

  • Page 25: Formula 1.4 Flow Per Zone

    Total Zone Flow = Total Litres per Hour in the Irrigated Zone Example: Application Rate of 8.0mm/Hr in an irrigated area of 200m 8.0mm/Hr x 200m = 1,600L/H (÷ 60 to convert to L/M) = 26.7L/M Total Zone Flow for this area is 26.7L/M. NETAFIM @BCL@C40BDC65.doc 21/12/2009...
  • Page 26 Requirement (PWR) by seven (days). WWR = PWR x 7 Step 4: Determine the Total Water Requirement (TWR) by multiplying the Weekly Water Requirement (WWR) by the Area (m ) that is being irrigated. TWR = WWR x Area (m NETAFIM @BCL@C40BDC65.doc 21/12/2009...
  • Page 27 Step 7: Determine Total Zone Flow by multiplying the Application Rate (AR) by the Area (m that is being irrigated. TZF = AR x Area (m Step 8: Determine the Duration of Irrigation (D) by dividing the Gross Water Requirement (GWR) by the Total Zone Flow (TZF). D = GWR ÷ TZF NETAFIM @BCL@C40BDC65.doc 21/12/2009...
  • Page 28 Step 3: Weekly Water Requirement (WWR = PWR x 7) WWR = 3.52 x 7 WWR = 24.6mm per week Step 4: Total Water Requirement (TWR = WWR x Area m TWR = 24.6mm x 200m TWR = 4,920 Litres per week NETAFIM @BCL@C40BDC65.doc 21/12/2009...
  • Page 29 Always perform visual checks to ensure your plants are getting enough water. Netafim Watering Calculator: A Netafim Water Calculator can be downloaded from the Landscape section http://www.netafim.com.au/index.php?sectionid=3 )of the Netafim Australia website.

  • Page 30: Techline As™ Installation Guide

    T E C H L I N E A S ™ D E S I G N G U I D E TECHLINE AS™ INSTALLATION GUIDE: Specifications: The information in this guide should be used when installing drip irrigation system in conjunction with specific design details that are usually supplied on a Drip Irrigation Design/Plan.
  • Page 31 Commence testing and record flow rate. This data will serve as a record for future reference. 5 Easy Step Easy Guide: A Netafim 5 Easy Step Easy Guide can be downloaded from the Landscape section http://www.netafim.com.au/index.php?sectionid=355 ) of the Netafim Australia website.

  • Page 32: 6.0 System Maintenance

    Each dripperline shall be flushed out thoroughly three times to ensure that the lines are free of any dirt or debris and that the dripperlines are filled with water. Commence testing and record flow rate. NETAFIM @BCL@C40BDC65.doc 21/12/2009...

  • Page 33: Techline As™ System Inspection Checklist

    T E C H L I N E A S ™ D E S I G N G U I D E TECHLINE AS™ SYSTEM INSPECTION CHECK LIST: Project Name:………………………………………………………………… Date:………………… 0.3m 0.4m 0.5m Dripper Spacing 0.3m 0.4m 0.5m Other Dripperline Spacing 1.6 LPH...

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