The Asco EF8025B223 Solenoid Valve is a high-capacity explosionproof valve engineered for safe steam shutoff in large-volume systems. Its Latched Closed, No Voltage Release design maintains a sealed flow path while powered and trips open only when the coil is de-energized. Built with a brass body and PTFE-based sealing system, it ensures performance under sustained high-temperature steam exposure.
For Standard Enclosure: Asco 8025B223 Solenoid Valve
Technical Specifications
- Valve Type: Manual Reset, Special Service Pilot, Latched Closed
- Pipe Size: 1 1/2″ NPT
- Flow Factor (Cv): 22.5
- Operating Pressure Differential:
- Steam: 5 to 125 psi
- Maximum Fluid Temperature:
- AC: 353°F (178°C)
- DC: 353°F (178°C)
- Body Material: Brass
- Seal Material: PTFE Disc with EPDM, FPM, and PTFE Seals
- Voltage Options:
- AC (60Hz): 24, 120, 240, 480V
- DC: 6, 12, 24, 120, 240V
- Watt Rating:
- AC: 20 watts
- DC: 36.2 watts
- Coil Insulation Class: F (AC), H (DC)
- Solenoid Enclosure:
- Explosionproof and Watertight, Types 3, 7(C and D), and 9
Key Features and Functionality
- Explosionproof Rated for Steam: Designed for classified environments with elevated thermal demands.
- Fails Open with Power Loss: Automatically opens when an electrical signal is cut.
- Reset-Gated Restart Logic: A manual reset is required to resume steam flow.
- Cv 22.5 for Large Systems: Optimized for high-volume steam throughput.
- Flexible Mounting Configuration: Supports universal installation positioning.
Compatible Components and Related Parts
- ASCO RedHat II Coil Series
- ASCO Manual Reset Lever Kits
- ASCO Seal Kit for 8025 Series
- ASCO Explosionproof Solenoid Enclosure
Industry Applications
- Main Steam Header Isolation: Maintains tight shutoff until trip event.
- Facility-Wide Heat Distribution: Controls bulk flow with safety-focused logic.
- Sterile Processing Environments: Integrates into fault-driven release systems.
- Thermal Relief Pathways: These open only during intentional signal interruption.
- Industrial Boiler Rooms: Protects personnel and assets through controlled venting.
Compliance and Approvals
- UL Listed
- CSA Certified
- CE Compliant
- Explosionproof and Watertight, Types 3, 3S, 4, 4X, 6, 6P, 7, and 9
- Explosionproof and Raintight, Types 3, 7, and 9
Installation and Operational Notes
- Mount in any orientation based on line design.
- A manual reset must follow each de-energized trip.
- Explosionproof fittings and conduit required for hazardous zones.
- Confirm correct voltage and insulation class before energizing.
- Rated for saturated steam only; not intended for other media types.
Series Catalog
Asco 8015/8025 Manual Reset Valves
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