The Asco 8221G023 Solenoid Valve (8221G23) is a pilot-operated, normally open valve engineered for applications where continuous fluid flow is essential until shutoff. Designed with a 1/2-inch NPT inlet and a 9/16-inch orifice delivering a Cv of 3.5, it provides reliable flow control for medium-demand systems. Its slow-closing mechanism ensures a gradual shutoff, minimizing water hammer and protecting downstream equipment.
Technical Specifications
- Valve Type: Pilot Operated, Normally Open, 2-way
- Pipe Size: 1/2″ NPT
- Flow Factor (Cv): 3.50
- Operating Pressure Differential:
- Water: 5 to 150 psi (AC)
- Maximum Fluid Temperature: 180°F (82°C)
- Body Material: Brass
- Seal Material: NBR (Nitrile Butadiene Rubber) and PTFE
- Voltage Options:
- AC (60Hz): 24, 120, 240, 480V
- AC (50Hz): 110, 220V
- DC: 6, 12, 24, 120, 240V
- Watt Rating:
- AC: 16.1 watts
- Coil Insulation Class: F
- Solenoid Enclosure:
- Standard: RedHat II (Watertight, Types 1-4X); RedHat (Type I)
- Optional:
- RedHat II (Explosionproof & Watertight, Types 3-9)
- RedHat (Explosionproof & Raintight, Types 3, 7, 9)
Key Features and Functionality
- Continuous Flow Operation: Remains open by default to allow uninterrupted fluid passage until activation is required.
- Gradual Shutoff: The slow-closing design minimizes abrupt pressure changes, reducing water hammer effects.
- Optimized for Medium Flow: Cv of 3.5 ensures precise control in systems with moderate flow demands.
- Robust Build Quality: Constructed with a brass body and stainless steel components for durability in industrial settings.
- Energy-Conscious Design: The pilot-operated mechanism delivers reliable performance with efficient power usage.
Compatible Components and Related Parts
- Available in versions for both standard and explosion-proof configurations.
- Includes brackets and adapters designed for NPT installations.
Industry Applications
- Water & Wastewater: Supports constant flow in municipal and industrial systems.
- Process Automation: Enables precise fluid control in manufacturing.
- HVAC & Cooling: Maintains stable flow in large-scale cooling circuits.
- Fire Suppression: Ensures reliable operation in emergency shutoff situations.
Compliance and Approvals
- CSA Certified
- UL Listed (General Purpose Valves)
- CE Compliant (RedHat II series)
Installation and Operational Notes
- Can be installed in any orientation without impacting performance.
- Operates effectively with a minimum of 5 psi and maintains stability at a 3 psi differential.
- Ensure the selected voltage is confirmed during the ordering process.
We ship this product worldwide! Delivery is normally stock.
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