Overview
The ASCO EFHT8344G074 is a robust pilot-operated, 4-way solenoid valve from ASCO’s Red Hat II series. Designed for precise fluid control in industrial applications, this valve combines dual voltage compatibility (120/60V AC and 110/50V AC), explosion-proof construction, and proven reliability. The model EFHT8344G074 comes factory sealed and new in box, suitable for air, inert gas, water, and light oil applications up to 300 SSU viscosity.
Key Features
- 4-Way, Single Solenoid Configuration: Provides directional control for double-acting cylinders and pneumatic systems
- Pilot-Operated Piston/Poppet Design: Ensures consistent flow control and minimal pressure drop across operating range
- Brass Body with NBR Seals: Durable construction resists wear, corrosion, and provides reliable service life
- Explosion-Proof Enclosure (EF): NEMA 4X rated housing protects against hazardous environments, water, dust, and corrosion
- Manual Override Operator: Allows manual valve actuation during setup, maintenance, or power loss
- Mountable in Any Position: Flexible installation orientation without performance degradation
Technical Specifications
- Valve Function: 4-Way, 2-Position, Normally Closed
- Port Connection: 1/2″ NPT
- Orifice Size: 3/8″
- Cv (Flow Factor): 1.4
- Operating Pressure Differential: Minimum 10 PSI
- Maximum Pressure: 150 PSI Air / 125 PSI Water
- Voltage Rating: 120V AC (60 Hz), 110V AC (50 Hz)
- Body Material: Brass
- Seal Material: Nitrile Rubber (NBR)
- Enclosure Type: Explosion-Proof (EF) with Watertight Design
- Media: Air, inert gases, water, light oils (up to 300 SSU)
- Rebuild Kit: Part No. 302711
Typical Applications
The ASCO EFHT8344G074 is widely used in industrial settings requiring precise directional control:
- Pneumatic and hydraulic cylinder actuation in manufacturing equipment
- Biofuels production and processing systems
- Heating and HVAC equipment control
- Life science and laboratory instrumentation
- Oil and gas refining operations
- Analytical and diagnostic instrument automation
- Industrial automation and machine tool control
Compatibility & Replacements
Compatible With
- Standard pneumatic circuits operating at 80–150 PSI
- Hydraulic systems up to 125 PSI water/oil service
- Double-acting pneumatic and hydraulic cylinders
- Industrial control systems requiring manual override capability
- Hazardous location environments classified under NEMA 4X standards
Replaces / Drop-In Replacement For
- ASCO EF8344G074 (equivalent model without Red Hat II designation)
- ASCO EF8344G074MO (manual operator variant)
- Earlier generation ASCO 8344 series solenoid valves with equivalent port configurations
Works With
- ASCO 1/2″ NPT solenoid valve manifolds and sub-plates
- Parker, Bosch Rexroth, and Eaton directional valve adapter systems
- Standard pneumatic and hydraulic tubing (1/2″ NPT fittings)
- Industrial PLC control systems with 120V AC solenoid outputs
- ASCO valve coil replacement kits and sealing components
