Overview
The SMC AR40-04 is a compact Size 40 modular pneumatic pressure regulator designed for industrial compressed air applications. With an adjustable pressure range of 0.05–0.7 MPa and downward knob adjustment, this unit provides smooth, reliable outlet pressure regulation for pneumatic circuits. The regulator features a relieving exhaust type mechanism and is offered here in used condition, fully tested and ready for immediate deployment.
Key Features
- Adjustable Pressure Range: 0.05–0.7 MPa (7–101.5 psi) for precise system control
- Modular Design: Compatible with other SMC AR series air preparation equipment of similar size for flexible system integration
- Downward Knob Adjustment: Smooth, intuitive pressure setting mechanism
- Relieving Exhaust Type: Automatically vents excess pressure to maintain set point stability
- Compact Size 40 Body: Space-efficient footprint suitable for panel mounting and manifold integration
- Left-to-Right Flow Design: Standard inlet-to-outlet configuration for straightforward piping
Technical Specifications
- Manufacturer: SMC Pneumatics
- Model Number: AR40-04
- Body Size: Size 40
- Port Size: 1/2 inch
- Thread Type: Rc (Tapered Pipe Thread); NPT thread versions available as alternatives
- Pressure Range: 0.05–0.7 MPa adjustable
- Regulator Type: Relieving type (pilot-operated)
- Flow Direction: Left-to-right
- Adjustment: Downward knob
- Number of Ports: 2 (inlet, outlet)
- Base Configuration: Without pressure gauge; without mounting bracket
- Material: Aluminum die-cast body with NBR seals
- Condition: Used, fully tested and functional
Typical Applications
- General pneumatic system pressure control and regulation
- Air line preparation and conditioning in manufacturing facilities
- Machine tool and assembly line pneumatic circuits
- Flow control and pressure stabilization in pilot-operated systems
- Panel-mounted and in-line regulator configurations
- Retrofit and replacement of existing AR40 series regulators
Compatibility & Replacements
Compatible With
- SMC modular air preparation components (Size 40 class)
- Standard compressed air systems (7–100 psi operating range)
- Panel-mounted pneumatic control circuits
- Rc 1/2″ and NPT 1/2″ pneumatic piping systems
- Pneumatic manifold and valve stations using Size 40 modules
- Industrial F.R.L. (Filter-Regulator-Lubricator) assemblies
Replaces / Drop-In Replacement For
- AR40-04 (exact same model)
- AR40-N04 variants without NPT designation
- Earlier SMC AR40 regulator models with similar port size and pressure range
Works With
- SMC air preparation equipment (AR series modularity)
- Standard Rc and NPT threaded connectors
- Pilot-operated proportional directional control valves
- Pneumatic flow control valves and speed controllers
- Pressure gauges and switches (Rc or NPT-threaded)
- Industrial pneumatic tubing and hose assemblies
