Overview
Grow Irrigation Systems comprise of the Grow Irrigation post assembly’s (Sprinklers, Valves and Valve Controllers).
Post assembly components are permanently fixed to deer posts or galvanised pipe at a height of 1.8m to 2.3m above ground to avoid stock damage.
Each post assembly is programmed to run in set cycle times, applying the desired application and ensuring the right amount of water is applied in the right place at the right time.
We will work with you to design a system to suit your individual irrigation requirements, whether working with existing infrastructure or designing a new system we will find the right fit for your property.
Grow systems can be installed by you to help manage cost or alternatively installed by our experienced contractor. With either option Grow staff will be available onsite to help manage the project and commission the system on completion of installation.
System costs do vary due to many site and system specific factors, but generally fall between $6,000 – $9,000 per hectare.
Big Gun (High Pressure & Flow)
Advantages
- Wide post spacing’s (up to 70m)
- Individual sprinkler control to allow variable application rates for differing soil types.
- High application rates allowing total use of water supply/allocation.
- High DU and CU.
- Low labour input.
Design example (Big Gun)
The below examples show a 4.5ha border dyke conversion to Static Set Irrigation.
The system is supplied via 100mm PVC PN6
Each sprinkler is individually controlled by an 80mm solenoid valve and D C controller, mounted directly to the top of an 80mm galvanized pipe.
Post spacing = 70m
Throw Radius = 60m (23 l/s @ 5bar)
Sprinklers p/ha = 1.3
Large Impact Sprinklers (Medium Pressure & Flow)
Grow medium to high pressure systems require a minimum sprinkler operating pressure of 4 bar (58psi).
ADVANTAGES
- Wide post spacing’s
- Individual sprinkler control to allow variable application rates for differing soil types.
- High application rates allowing total use of water supply/allocation.
- High DU and CU.
- Low labour input.
- Perfect for hill country
DESIGN EXAMPLE (MEDIUM TO HIGH PRESSURE)
The below example shows a 4.5ha border dyke conversion to Static Set Irrigation.
The system is loop lined with 63mm MDPE and supplied via 100mm PVC.
Each sprinkler is individually controlled by a 40mm solenoid valve and controller, both mounted to the post.
Below the solenoid valve is an optional frost free ball valve to control pressure and flow to the sprinkler and allow easy shut off for maintenance.
The boundary areas have been filled in with optional small adjustable arc sprinklers to increase uniformity.
Post spacing = 38m (50% offset)
Sprinklers p/ha = 6.2 (11 including arc’s)
Minimum flow required = 3.5l/s (one sprinkler)
Small Impact Sprinklers ( Low Pressure & Flow)
Grow low pressure systems require a minimum sprinkler operating pressure of 3 bar.
Unlike our High pressure system each lateral line (5 or more sprinklers) is controlled via 2 underground valves located at each end of the lateral line.
Advantages
- High DU and CU
- Lower supply volume required per sprinkler head.
- Likely to be compatible with existing infrastructure i.e. Pivot corners – K-line – or conversion from other spray methods.
- Each sprinkler is fitted with a reduction valve to ensure even pressure and application.
- Low labour input.
- Perfect for hill country
Design example (Low pressure)
The below example shows a 4.5ha border dyke conversion to Static Set Irrigation.
The system is looped lined with 63mm MDPE and supplied via 80mm PVC.
5 sprinklers operate per irrigation cycle and are controlled via two underground valves located at each end of the lateral sub sections.
Each sprinkler is fitted with a pressure regulator to equalise operating pressure to 3.45 bar over the entire system, this ensures equal flows, pressure and uniformity over the irrigated area.
Post spacing = 25m (50% offset)
Sprinkler p/ha = 15
Minimum flow required = 1 l/s (3.45 bar) (per sprinkler)
