Description
2" Irrigation Water Solenoid Valve – PN22520A
The PN22520A is a 2" normally closed irrigation solenoid valve designed for high-flow automatic water control in agricultural irrigation, sprinkler, landscaping and commercial watering systems.
Featuring a large 50mm flow orifice delivering 668 L/min water flow at 1 Bar pressure drop, the PN22520A provides substantial flow capacity while using a lightweight, corrosion-resistant glass-reinforced UV-resistant PA66 body with stainless steel internal components.
The valve incorporates an anti-water hammer design, manual override and external bleed screw with removable metering pin, providing reliable automatic operation together with convenient commissioning and maintenance.
Valve Function & Operation
Function: 2/2 way normally closed
Operation: Servo / pressure assisted
The PN22520A remains closed when electrical power is removed and opens when the solenoid coil is energised.
The pressure-assisted diaphragm design requires a minimum differential pressure across the valve:
Minimum differential: 0.65 Bar
Working pressure: 0.65 to 10 Bar / approximately 150 PSI
This pressure-assisted design allows the solenoid operator to control the valve's large 50mm main flow passage efficiently.
Port & Flow Performance
Port: 2" BSP
Optional: 2" NPT
Orifice: 50mm
Water flow: 668 L/min at 1 Bar pressure drop
That's approximately 40 m³/hour at 1 Bar pressure drop, making the PN22520A particularly suitable for larger irrigation zones and high-flow agricultural water distribution.
Anti-Water Hammer Design
The PN22520A incorporates an anti-water hammer design to help reduce hydraulic shock during valve operation.
This is particularly important on a 2" valve capable of flowing 668 L/min, where sudden interruption of water flow can generate significant pressure surges.
Controlled operation helps reduce stress on:
Irrigation pipework
Pumps
Sprinkler systems
Fittings and manifolds
Downstream irrigation equipment
Manual Override
The integrated manual override allows the valve to be operated locally without an electrical control signal.
This provides convenient manual control during system commissioning, maintenance, controller testing or electrical failure.
External Bleed & Easy Cleaning
An external bleed screw with removable metering pin provides convenient access to the pilot circuit.
The metering pin can be removed for cleaning without complete disassembly of the valve, helping simplify maintenance where sediment or small contaminants may be present in irrigation water.
Construction & Materials
Body: Glass-reinforced PA66
Body properties:
UV resistant
Corrosion resistant
Internals: Stainless steel
Seals: NBR
The combination of reinforced engineering plastic and stainless steel internals provides a strong but lightweight construction suited to outdoor irrigation and water-control installations.
Media & Temperature
Media: Water
Maximum media temperature: +60°C / 140°F
The PN22520A is primarily designed for irrigation and water-control applications, rather than as a general-purpose chemical process solenoid valve.
IP66 Solenoid Coil
Protection: IP66
Connection: 30cm flying leads
Duty: 100% continuous
12.5W DC / 12.5VA AC
Voltage Options
Available voltages:
12V DC
24V DC
24V AC
110V AC
230V AC 50/60Hz
The combination of AC and DC options allows the PN22520A to be integrated with low-voltage irrigation controllers or conventional mains-powered control systems.
Typical Applications
Agricultural irrigation
High-flow sprinkler systems
Large irrigation zones
Landscape irrigation
Greenhouse watering
Sports ground irrigation
Underground water systems
Commercial watering systems
Irrigation pump systems
Automated water distribution
High-Flow 2" Irrigation Control
The main selling point of the PN22520A compared with the smaller PN225 models is its 50mm orifice and 668 L/min water flow capacity.
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