The Asco 8025B222 Solenoid Valve is a manually reset, pilot-operated valve for steam applications requiring strict shutdown control. It features a Latched Closed, No Voltage Release design, remaining closed while energized and opening only when de-energized. With a brass body and steam-rated sealing system, it ensures reliable performance in high-temperature systems.
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:
- 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 Design: Remains shut during energized conditions.
- Trip-to-Open Behavior: The valve opens only on power loss.
- Steam-Compatible Sealing: Rated for high heat and vapor exposure.
- Medium Line Coverage: This is suitable for mid-scale thermal networks.
- Manual Reset Lockout: Restart requires deliberate operator action.
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 Line Isolation: Opens during signal failure for controlled venting.
- Sterilization Equipment Controls: Prevents automatic restart post power cut.
- Laundry Processing Systems: Allows flow only when de-energized.
- Boiler Header Protection: Trips open under safe shutdown protocol.
- Reset-Gated Loops: Requires manual action to restore flow.
Compliance and Approvals
- CSA Certified
- Meets shock and vibration per ISA S71.03C2
Installation and Operational Notes
- Install in any orientation as needed.
- Reset is required following any trip condition.
- Designed specifically for saturated steam service.
- Check media temperature and pressure before commissioning.
- Use sealed conduits where explosionproof enclosures are applied.
Series Catalog
Asco 8015/8025 Manual Reset Valves
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