The Asco 8221G005 Solenoid Valve (8221G5) is a pilot-operated, normally closed solenoid valve that controls water flow while preventing pressure surges. It is used in industrial, commercial, and municipal water systems where water hammer mitigation is required. With a slow-closing snubber, brass body, and NBR seals, it ensures durability and reliable operation in demanding environments.
Technical Specifications
- Valve Type: Pilot Operated, Normally Closed, 2-way
- Pipe Size: ¾” NPT
- Flow Factor (Cv): 5.5
- Operating Pressure Differential:
- Water: 5 to 150 psi (AC) / 5 to 125 psi (DC)
- Maximum Fluid Temperature:
- AC: 180°F (82°C)
- DC: 150°F (65°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: 6.1 watts
- DC: 11.6 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
- Slow Closing Mechanism: The integrated snubber slows down valve disc closing speed.
- Pilot Operated: Ensures reliable control over fluid flow with minimal power consumption.
- Normally Closed Operation: The valve remains closed when de-energized and opens upon energization.
- Durable Brass Construction: Provides corrosion resistance and long service life.
- UL and CSA Certified: Meets general-purpose valve certifications.
Compatible Components and Related Parts
- Replacement coils are available for general-purpose and explosion-proof applications.
- Mounting accessories compatible with NPT pipe sizes for secure installation.
Industry Applications
- Water Hammer Prevention: Slow-closing valve design for system protection.
- Industrial Fluid Control: Reliable operation in manufacturing plants.
- HVAC & Plumbing: Ensures automated and stable flow control.
- Municipal Water Systems: Supports treatment and distribution processes.
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 affecting performance.
- Requires at least 5 psi to open and stays open with 3 psi differential pressure.
- Must specify voltage at the time of ordering. Other voltages are available upon request.
We ship this product worldwide! Delivery is normally stock.
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