The Asco 8221G021 Solenoid Valve (8221G21) is a normally open solenoid valve designed for continuous water flow applications where the shutoff is only needed when energized. With a 3/8-inch NPT port and a Cv of 3.0, it is optimized for low-flow industrial and commercial fluid control. Its slow-closing mechanism prevents water hammering, ensuring system stability and reducing pressure spikes.
Technical Specifications
- Valve Type: Pilot Operated, Normally Open, 2-way
- Pipe Size: 3/8″ NPT
- Flow Factor (Cv): 3.0
- 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), 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
- Maintains Continuous Flow: Ensures unrestricted fluid movement until powered.
- Minimizes Water Hammer: Slow-closing mechanism dampens sudden pressure shifts.
- Efficient Fluid Regulation: Optimized for applications where steady, controlled flow is required.
- Rugged Construction: Corrosion-resistant brass body withstands long-term industrial use.
- Pilot Operated System: Reduces power demand while providing precise flow control.
Compatible Components and Related Parts
- Coil replacements are available for standard and hazardous environments.
- Installation kits designed for seamless NPT pipe integration.
Industry Applications
- Normally Open Valves: Ideal for industrial water control applications.
- Automated Fluid Distribution: Supports manufacturing and processing plants.
- HVAC & Cooling: Ensures continuous water circulation for efficiency.
- Municipal Irrigation: Maintains preset flow rates for optimal water use.
Compliance and Approvals
- CSA Certified
- UL Listed (General Purpose Valves)
- CE Compliant (RedHat II series)
Installation and Operational Notes
- Can be positioned in any orientation without affecting functionality.
- Requires a minimum of 5 psi to open and remains open with 3 psi differential pressure.
- Specify voltage when ordering to ensure compatibility.
We ship this product worldwide! Delivery is normally stock.
Request a Quote now or call us at 1-800-755-2883 for expert assistance.