STEP 1
Determine how many spray stakes you can operate at the same time. Use the Zone Flow chart to establish how much water it would take to operate one zone of spray stakes with the spray stake flow rate you have selected. You do not need to operate the maximum amount, but do not exceed the maximum. If the amount of water required exceeds the amount you have available, you might reduce the zone size or consider using a lower flow spray stake. Suggestion: Build a table listing the flow of each zone you wish to operate.
STEP 2
Determine how long a row or ‘run’ you can make with each line of spray stakes. This is influenced by several factors and you can balance them according to your priorities. The Length of Run Considerations chart demonstrates how the influencing factors are related.
When the spacing for the spray stakes has been determined, you are ready to select the pipe size and operating pressure:
- There are four Length of Run charts, one for each flow rate.
- Select the chart based on the flow rate you will be using (see pages 9 and 10).
- Select the spacing to be used for the spray stakes. Reading across to each pipe size, find the maximum length of run (in feet) available for several inlet pressures (in psi).
- Each option also includes the number of pots for that length of run (shown in parenthesis).
Note: The Length of Run charts do not account for slope. Although the pressure compensating feature of the PC spray stake will ensure that all flows will be the same, it is still necessary to operate the spray stake with a minimum of 22 psi and a maximum of 55 psi. If you are working with slopes, it is advisable to use a qualified Netafim Dealer to assist you in your design to be certain you have a pressure balanced system.
STEP 3
Select the major system components. Once you have selected the spray stake, established the flow of each zone and sized the poly pipe, it is time to size the major system components. Several key components and the most commonly selected models are listed here. For additional options, contact Netafim USA Customer Service.
Valves
Netafim offers Valve solutions for nearly every need. The Valves chart shows the most common valves used in spray stake systems and includes electric solenoid valves for automatic systems (used with a controller) and pressure reducing valves to manage system pressure in a manually operated system with high pressures (over 60 psi).
Filters
Filter options include disc, screen, sand media and hydrocyclones (for sandy wells). Some filters are for specific water applications and some are multi-purpose. Excellent options are available for both well water and surface water sources. Recommended filtration is 120 mesh.
Water Meters
Water Meters are the simplest and best ‘window’ into what is going on in your system. The key to a long lasting, low maintenance system is through preventative maintenance. A periodic check of the water meter can tell you when it’s time for maintenance.
Automation
Growers considering automation should visit our website or call 888-NETAFIM to request brochures relating to Automation Products. With a variety of controllers to fit many needs; from 16 to 600 valves with standard multi-wire, dual strand cable, stand-alone, radio control or central control, you can start with simple or richly featured programs and immediately realize the full potential of an automated system.
Piping, Fittings and Accessories
Netafim offers a wide selection of Polyethylene (PE) Pipe, Fittings and Accessories used in a successful spray stake system. Your qualified Netafim dealer should be able to guide you through this selection process.
