Overview
The Humphrey 250-4E1 is a compact 4-way pneumatic solenoid valve engineered for general-purpose directional control. Manufactured using a diaphragm-poppet design, this valve provides consistent, crisp shifting and tight sealing across the full pressure range, making it ideal for double-acting pneumatic cylinders up to 4 inches bore. The 250 series is known for reliable performance in moisture-laden air and harsh industrial environments where other valve designs may falter.
Key Features
- 4-way, 2-position solenoid-operated valve for directional control
- Diaphragm-poppet design for crisp shift response and seal integrity
- Operates cleanly in poor air quality and moisture-laden environments
- Available in single and dual solenoid configurations
- Compact cartridge body suitable for manifold integration
- Multiple voltage options: 24 VDC, 120 VAC, and custom specifications available
Technical Specifications
- Type: 4-way, 2-position solenoid valve
- Actuation: Pilot-operated solenoid
- Port Thread: 1/4″ NPT
- Pressure Range: 30–125 PSI continuous
- Cavity Size: Suitable for 4″ bore cylinders (typical)
- Media: Compressed air, inert gases
- Body Material: Aluminum with ductile iron ports
- Operating Temperature: Standard industrial range (verify per coil spec)
- Solenoid Coil Options: 24 VDC, 120 VAC 50/60 Hz, 240 VAC available
- Coil Power: 13.4–16.4 W typical (voltage-dependent)
- Weight: Approximately 2.65 lbs
- Connection: Manifold cavity or field piping via NPT ports
Typical Applications
- Double-acting pneumatic cylinder control in assembly equipment
- Material handling and automation systems
- Industrial machinery directional valve control
- Mobile and off-road equipment hydraulic/pneumatic circuits
- Packaging and production line automation
- Pneumatic tool and equipment operation
Compatibility & Replacements
Compatible With
- Standard pneumatic cylinder ports (SAE and ISO cavity mounting)
- Humphrey manifold systems and valve bodies
- Industrial compressed air systems (30–125 PSI)
- Single and dual solenoid manifold assemblies
- Air pilot-operated logic systems
Replaces / Drop-In Replacement For
- Previous generation Humphrey 250-series valves with matching cavity
- Verify exact cavity and port configuration before substitution; consult Humphrey cross-reference documentation
Works With
- Pneumatic control logic circuits (cascaded pilot operation)
- AC and DC solenoid coil specifications (standard industrial voltages)
- Manifold sandwich valve configurations
- Standard compressed air networks with appropriate filtration
