1. Supply & Installation of Main Lines, Lateral Lines, and Distribution Lines
- Pipe Selection and Preparation: Select uPVC or HDPE pipes based on the design specifications. Cut, chamfer, and clean the pipes to remove debris.
Trench Excavation: Excavate trenches as per the required pipe cover depth, ensuring stable trench walls. Place a 100mm granular bedding layer to support the pipes.
Pipe Laying: Lay pipes on the prepared bed, aligning horizontally and vertically. Use solvent-welded joints for uPVC or rubber-ring joints for HDPE, ensuring complete joint depth.
Backfilling: Carefully backfill in layers, compacting to avoid voids. Place detectable warning tape 300mm above main lines for future detection
2. Supply and Installation of Tertiary Irrigation Networks
Trench Preparation: Excavate shallow trenches for tertiary lines according to design. Lay bedding material if required.
Network Assembly: Lay tertiary pipes branching from lateral lines, ensuring connections are watertight. Use push-fit or solvent-weld joints as specified.
Backfilling and Testing: Backfill in layers and compact around the pipes. Conduct leak tests before covering the final layer to ensure connection integrity.
3. Supply & Installation of Valves and Chambers
Valve Installation: Position valves (e.g., solenoid, gate valves) as per design, using specified flanges and fittings. Ensure valves are accessible for maintenance.
Chamber Installation: Install valve boxes and chambers on stable, level surfaces, adjusting for soil movement. Use cement-sand bedding to secure chambers and align with the surrounding finish grade
4. Supply & Installation of Control Systems
Controller Setup: Install irrigation controllers in accessible, weatherproof locations. Ensure power supply stability, using voltage regulators if necessary.
Connection and Calibration: Connect controllers to remote valves and sensors. Calibrate the system to meet operational requirements, configuring each zone’s settings per schedule.
5. Supply & Installation of Road Crossing Ducts
Trench Excavation for Road Crossing: Excavate trenches across roads, following permits and authority guidelines. Use PVC ducts with diameters 50mm larger than the irrigation pipe.
Duct Installation: Lay ducts across the trench, encasing them in concrete where specified. Secure the duct ends with protective caps to prevent soil entry.
Backfilling and Compaction: Backfill and compact around ducts as required. Ensure ducts remain accessible at both ends for maintenance and future access
6. Supply & Installation of Irrigation Accessories
- Drip Lines: Carefully uncoil and lay drip lines without kinks, aligning as per design. Secure with stakes at specified intervals. Inspect for coverage and leaks after installation.
- Bubblers: Install bubblers close to plant bases for focused irrigation. Position according to plant requirements and check for even distribution.
- Sprayers/Sprinklers: Install sprayers/sprinklers at designated points to ensure full coverage without overspray onto pavements. Adjust angles and spray patterns for optimal distribution.
- Subsurface Irrigation: Bury drip lines below the soil surface, ensuring they are properly spaced and positioned to target root zones. Inspect for even coverage and minimize surface evaporation.
7. Supply & Installation of Flow Meters
a. Pre-Installation Preparation
- Verify that the flow meter meets all hydraulic specifications, including pipe diameter and flow capacity. Ensure all necessary components, such as grounding rings and straps, are available for installation
b. Sensor Positioning
- Install the sensor at a location that guarantees it remains filled with liquid, even when there is no flow, as this is critical for accurate measurement.
- Ensure the sensor is positioned away from sources of electromagnetic interference (such as electrical panels) and mechanical vibrations to prevent measurement errors.
- Protect the sensor from direct sunlight by using shades or coverings if installed outdoors to prevent damage.
c. Grounding
- If the pipeline is metallic, directly ground the sensor to the pipeline.
- For non-conductive pipelines (e.g., plastic), use grounding rings to connect the sensor securely to the ground. This step is essential for both measurement stability and safety.
- Grounding also minimizes electrical noise interference, ensuring a stable flow rate reading.
d. Cable Gland Tightening
- Secure all cable glands to prevent moisture or dust ingress, which could affect the sensor’s impermeability. Ensure cables are properly aligned and protected to prevent strain or pressure buildup within the device.
e. Final Testing and Calibration
- After installation, conduct a flow test to verify that the sensor is reading accurately. Check grounding effectiveness, cable connections, and sensor stability.
- Adjust as needed to ensure the flow meter is functioning correctly and providing precise measurements.
8. Supply & Installation of Weather Station (Solar Sync)
a. Preparation and Site Selection
- Choose a suitable location for the Solar Sync weather sensor. Ensure it is exposed to direct sunlight and positioned to accurately measure local conditions without obstructions from structures, trees, or other elements.
- Gather mounting equipment, including the gutter mount bracket if attaching to a roof or gutter.
b. Mounting the Sensor
- Secure the Solar Sync sensor using the appropriate mount (e.g., gutter or wall mount) as per the manufacturer’s instructions. Position it at a stable height, ensuring it will not be affected by rain splashes or debris.
- Angle and orient the sensor to face the sun directly to optimize measurements of sunlight and temperature.
c. Wiring and Connection to Controller
- Connect the Solar Sync sensor to the compatible Hunter controller, either using wired or wireless setup, depending on the model. Follow wiring instructions provided in the manufacturer’s manual to ensure proper connectivity.
- Integrate additional Rain-Clik™ and Freeze-Clik® sensors, if needed, to enable automatic irrigation shutdown during rain or freezing conditions.
d. Calibration and Configuration
- Configure the controller settings to enable Solar Sync’s ET-based adjustments. The sensor will calculate daily evapotranspiration (ET) values and automatically adjust irrigation run times based on local weather conditions.
- Test the connection by triggering a manual irrigation cycle, verifying the sensor’s correct operation and communication with the controller.
e. Testing and Final Adjustments
- Conduct initial tests to ensure the sensor accurately adjusts irrigation based on ET values. Check that the Rain-Clik™ and Freeze-Clik® features activate properly during rain or freezing conditions.
- Make any necessary adjustments to positioning or controller settings to optimize performance for the specific site conditions.
9. Supply & installation of irrigation filters
a. Pre-Installation Inspection
- Inspect all filter surfaces and components to ensure they are free of defects and foreign material.
- Check that the interior of the basket strainer is clean and free of any debris or contaminants that could affect filtration.
b. Positioning and Installation
- Position the basket strainer in the pipeline, ensuring the blow-down connection faces downward. This allows for easy drainage and maintenance.
- For flanged-end strainers, align the flanges and begin tightening the flange bolts gradually in a cross-pattern to ensure even pressure and a secure fit.
c. Leak Testing
- After securing the filter, gradually increase line pressure to check for leaks around all joint areas.
- If any leaks are detected, stop the pressure test, tighten bolts as necessary, and retest to ensure a leak-free installation.
d. Commissioning and Initial Operation
- Once installed, conduct a final inspection to verify that the strainer is correctly positioned and secured.
- Test the system at normal operating pressure to confirm functionality, monitoring for any pressure drops or flow issues.
e. Maintenance Preparation
- Ensure the installation area is accessible for future maintenance and strainer removal. Record the installation details for reference during periodic maintenance.
10. Supply and Installation of Irrigation Pumps
a. Preparation and Site Assessment
- Verify site readiness, ensuring the foundation is secure and level. The foundation concrete must have adequate strength to support the pump’s weight and avoid shifting during operation.
- Ensure compliance with local safety regulations and explosion protection standards if installed in hazardous environments.
b. Pump Installation
- Positioning: Place the pump set on the prepared foundation, ensuring alignment as per the general arrangement drawing.
- Construction and Components: Install the pump system, which includes the pump, motor, manifolds, and pressure tank. Use stainless steel materials for parts like impellers, guide vanes, and shafts to ensure durability.
- Motor Setup: Mount the motor, ensuring it is fan-cooled, squirrel-cage type, and compliant with IEC and DIN standards. Connect the motor to a 3-phase, 380V, 50Hz power source.
c. Piping and Connections
- Connect manifolds and pipes using steel fittings, conforming to API schedule 80. Ensure all connections are coated with epoxy for corrosion protection.
- Install a disc filter at the pump head for sediment removal, with a self-cleaning feature for maintenance efficiency.
d. Pressure Gauges and Cold Water Pressure Tank
- Install stainless steel, glycerine-filled pressure gauges for accurate monitoring.
- Position the cold-water pressure tank, with an operating pressure of at least 8 kg/cm², ensuring it can handle system demands
e. Testing and Commissioning
- Conduct initial system tests, gradually increasing pressure to inspect for leaks and ensuring the pump meets performance specifications.
- Flush all lines thoroughly to remove debris, and perform operational tests to check for stable and efficient system performance.
11. Main line tie in connections
a. Preparation and Site Inspection
- Inspect the existing mainline and tie-in location, ensuring it is free of obstructions and compatible with the new connection. Verify that all necessary materials, such as fittings, isolation valves, and sealing gaskets, are available and conform to project specifications.
b. Excavation and Trenching
- Excavate the trench for the tie-in connection to the required depth, ensuring it aligns with the main line and follows safety protocols. Keep the trench clear of debris to ensure a clean work area around the connection point.
c. Isolation and Pressure Release
- Shut down the main line, release any residual pressure, and isolate the section where the connection will be made. This step prevents water backflow and ensures a safe working environment
d. Connection Setup
- Install fittings (e.g., flanges or couplings) at the tie-in point, ensuring they match the existing main line specifications. Use approved flange bolts and gaskets, gradually tightening bolts in a cross-pattern to achieve a secure and leak-proof seal.
e. Valve Installation
- Install isolation valves at the connection point to control water flow through the new segment. Position the valves according to the design for easy access during future maintenance.
f. Testing and Inspection
- Gradually restore pressure to the system and inspect the tie-in connection for any leaks. Conduct a pressure test in the new segment to ensure the connection’s integrity and confirm that all components are functioning as specified.
f. Backfilling and Restoration
- Backfill the trench in layers, compacting the soil to protect the connection and prevent shifting. Restore the surface to its original condition as specified in the project plan.