Overview
The ASCO U8401B101 is a Series 401 (also designated 8401) pilot-operated solenoid slide valve engineered for air and inert gas applications. This aluminum valve combines direct solenoid actuation with a sliding spool design that provides non-stick sealing performance. The U8401B101 is rated for 20–150 PSI operating pressure and features a compact sub-base mounting design suitable for industrial heating systems, process control, and pneumatic automation equipment.
Key Features
- 4-way, 2-position valve configuration for directional control
- Pilot-operated solenoid actuation with momentary or continuous energization capability
- Aluminum body with non-stick sliding spool sealing member for durable operation
- 1/4″ NPT female threaded ports (all four connections)
- Sub-base mounting for flexible installation and system integration
- Rated for air and inert gas media; suitable for pneumatic and automation applications
- Adjustable flow control option (Cv 0.2–0.8) available for directional speed regulation
Technical Specifications
- Part Number: U8401B101
- Manufacturer: ASCO (Emerson)
- Series: 401 / 8401 Slide Valve
- Valve Type: 4-Way, 2-Position, Solenoid-Operated Slide Valve
- Port Size: 1/4″ NPT Female (all ports)
- Pressure Rating: 20–150 PSI
- Media: Air, Inert Gas
- Body Material: Aluminum
- Mounting Style: Sub-Base Mount
- Actuation: Solenoid (Single coil, momentary or continuous duty)
- Flow Coefficient (Cv): Up to 0.8
- Power Consumption: 6.3 W
- Operating Condition: Used, fully inspected and tested
Typical Applications
The U8401B101 is ideal for:
- Industrial heating system control and burner management
- Pneumatic directional control in automation equipment
- Air brake and pneumatic circuit switching in industrial machinery
- Inert gas distribution and switching in process applications
- Flow regulation and direction control in modular pneumatic systems
- OEM equipment requiring compact, reliable solenoid valve actuation
Compatibility & Replacements
Compatible With
- Standard 1/4″ NPT pneumatic systems and air circuits
- Inert gas (nitrogen, argon) distribution systems
- Industrial heating and combustion control systems
- Modular ASCO sub-base manifold mounting systems
- Standard solenoid coil voltages (24 VDC, 110/120 VAC, 220/240 VAC available in different model variants)
Replaces / Drop-In Replacement For
- Verify compatibility with your system integrator before ordering. ASCO Series 401 variants with matching port configuration and pressure rating may be interchangeable depending on electrical specifications.
Works With
- ASCO sub-base and manifold mounting systems
- Standard pneumatic control circuits and PLC systems
- Manual override operators (standard on Series 401 valves)
- Integral or remote solenoid coils (24 VDC, 110/120 VAC, 220/240 VAC configurations)
- Optional flow control regulators for adjustable spool speed
