The Asco EF8025B222 Solenoid Valve is a steam-duty, explosionproof valve engineered for safety-first flow interruption in heated systems. The Latched Closed, No Voltage Release configuration keeps steam flow blocked while powered, opening only when power is removed. The brass body and PTFE-based seal stack provide reliable operation in high-pressure, high-temperature steam environments.
For Standard Enclosure: Asco 8025B222 Solenoid Valve
Technical Specifications
- Valve Type: Manual Reset, Special Service Pilot, Latched Closed
- Pipe Size: 1 1/4″
- Flow Factor (Cv): 15
- 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 Steam Compliance: Rated for hazardous, high-temperature zones.
- Controlled Power-Off Activation: Opens flow only after voltage is dropped.
- Manual Reset for Secure Restart: This ensures deliberate operator intervention.
- Thermally Resilient Design: Handles 353°F steam with material stability.
- Unrestricted Installation Orientation: Adapts easily to vertical or horizontal piping.
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
- Steam Flow Isolation Systems: Shuts down safely until power loss triggers reopening.
- Process Vessel Heating: Opens only under intentional de-energization.
- Sanitary Steam Utilities: Maintains safe control in heat-sterile facilities.
- Safety Shutdown Networks: Integrates with E-stop or power-fail logic.
- Industrial Autoclave Controls: Triggers steam venting when electrical signal drops.
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
- Install in any orientation per system design.
- Requires manual reset following every trip.
- Must use certified conduit in classified zones.
- Confirm the coil voltage and insulation type before energizing.
- Steam service only; not rated for other fluids.
Series Catalog
Asco 8015/8025 Manual Reset Valves
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