Overview
The Numatics 554SS43AK000030 is a Mark 55 series double solenoid directional control valve engineered for pneumatic automation and motion control systems. This is a direct-acting, 2-position/4-way (5/2) solenoid valve rated for both vacuum and positive pressure operation. The flush non-locking manual override standard feature enables field intervention when needed. The plug-in electrical connection and individual subbase mounting make this valve a drop-in replacement for many existing systems.
Key Features
- Double direct solenoid actuation—two solenoids control spool position without pilot air
- 2-position/4-way (5/2) configuration suitable for single or dual-acting cylinders
- Individual subbase mounting with side ports and separate exhaust
- Plug-in AC electrical connection with integral pilot light indicator
- Flush non-locking manual override standard for emergency field actuation
- High flow capacity (232 scfm at 80 psig) in compact envelope
Technical Specifications
- Series: Mark 55
- Valve Type: Double Direct Solenoid, 2-Position/4-Way (5/2)
- Pressure Range: 28″ Hg vacuum to 150 psig (0–10 bar)
- Port Size: 1/2″ NPTF (pressure and exhaust ports)
- Flow Rate: 232 scfm @ 80 psig upstream
- Flow Coefficient: Cv 5.0
- Coil Voltage: 110–120 VAC, 50/60 Hz
- Holding Current: 0.4 A @ 115 Vac/50 Hz
- Inrush Current: 2.8 A @ 115 Vac/50 Hz; 2.5 A @ 120 Vac/60 Hz
- Operating Temperature: –10 to +115°F (–23 to +46°C)
- Enclosure Rating: NEMA 4 / IP65
- Mounting: Individual subbase with side ports
- Dimensions: 7.3″ L × 3.38″ W × 4.26″ H
- Manual Override: Flush non-locking (standard)
- Certifications: CSA, CE
Typical Applications
- Industrial automation and general-purpose pneumatic control
- Cylinder sequencing and directional control in process machinery
- Dual-acting and single-acting cylinder control in assembly equipment
- Pneumatic press and stamping machine valve systems
- OEM machinery requiring reliable, field-replaceable solenoid valves
- Motion control systems in harsh production environments
Compatibility & Replacements
Compatible With
- Mark 55 individual bases and manifolds
- Numatics/ASCO pneumatic systems and subsystems
- Standard 1/2″ NPT pneumatic piping and hose fittings
- Industrial PLC and automation control cabinets (120 VAC supply)
- Field panel-mount applications with AC power
Replaces / Drop-In Replacement For
- Similar Numatics Mark 55 solenoid valve units with matching base interface
- Verify exact cross-reference with your original equipment documentation
Works With
- Pneumatic manifold systems and sandwich-style regulators (with optional adapters)
- Standard industrial 120 VAC control power supplies and circuits
- Plug-in AC solenoid assemblies with 3-wire or 5-wire connectors
- ASCO/Numatics speed control and pressure regulator sandwiches
