The Asco 8025B221 Solenoid Valve is configured for steam shutoff in process lines that require a power-sensitive trip-to-open action. Its Latched Closed, No Voltage Release design holds the valve shut while energized and opens only when the coil is de-energized. Built for safety-critical installations, it features steam-rated materials and a manual reset for clear isolation and controlled system restart.
Technical Specifications
- Valve Type: Manual Reset, Special Service Pilot, Latched Closed
- Pipe Size: 1″ NPT
- Flow Factor (Cv): 13.5
- 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:
- Standard: RedHat metal solenoid enclosure, Type 1 General Purpose Junction Box
- Optional: Explosionproof and Watertight, Types 3, 7(C and D), and 9
Key Features and Functionality
- Latched Closed Position: Holds line shut while coil is energized.
- Trip-to-Open Response: Opens automatically when signal is lost.
- Steam-Certified Construction: Tolerates pressure and vapor cycling.
- Mid-Capacity Line Control: Built for moderate steam systems.
- Reset-to-Resume Function: Manual input is required after an electrical trip.
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
- Boiler Line Safety: Opens when energized coil is deactivated.
- Sterile Steam Loops: Trips open on power loss for safe depressurization.
- Steam Header Management: Allows flow only during fault conditions.
- Laundry Plant Distribution: The valve opens under trip conditions only.
- Reset-Critical Circuits: Flow resumes only through manual restart.
Compliance and Approvals
- CSA Certified
- Meets shock and vibration per ISA S71.03C2
Installation and Operational Notes
- The valve can be installed in any position.
- It must be reset manually after tripping.
- Use with clean, dry steam systems.
- Confirm application temperature and pressure range.
- Explosionproof installation requires conduit seal compliance.
Series Catalog
Asco 8015/8025 Manual Reset Valves
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