Overview
The Arrow R376 125 EU regulator is a mid-flow pneumatic air pressure control valve designed for industrial automation, manufacturing, and compressed air systems. Built by Arrow Pneumatics, this 3/4″ NPT regulator delivers consistent pressure regulation across a 5–125 psi operating range, with a maximum supply pressure rating of 250 psig. The durable aluminum body with black E-coat finish and glass-filled nylon bonnet ensures corrosion resistance and long service life in demanding shop-floor and mobile equipment environments.
Key Features
- Mid-flow capacity: 220 scfm maximum air flow for medium-to-high demand applications
- Port size: 3/4″ NPT inlet and outlet connections
- Pressure range: Adjustable from 5 to 125 psi; maximum supply pressure 250 psig
- Precision control: Standard adjustable knob for fine pressure tuning
- Durable construction: Aluminum body with black E-coat, glass-filled nylon bonnet, Buna-N seals
- Temperature stable: Operates reliably from 40 °F to 120 °F
- Gauge port: 1/4″ gauge port for optional pressure gauge installation (gauge not included)
Technical Specifications
- Pressure regulation range: 5–125 psig
- Maximum supply pressure: 250 psig
- Maximum air flow: 220 scfm
- Port size: 3/4″ NPT (inlet and outlet)
- Gauge port: 1/4″ NPT (full flow)
- Body material: Aluminum, black E-coated
- Bonnet: Glass-filled nylon
- Seals: Buna-N elastomer (standard)
- Seat: Brass
- Operating temperature range: 40 °F to 120 °F
- Dimensions (approx): 3.44″ L × 5.88″ H
- Weight: 1.3 lbs
- Knob type: Adjustable pressure relief knob
- Pressure gauge included: No (gauge port available)
Typical Applications
The Arrow R376 125 EU regulator is widely used in:
- Air compressor main line regulation for industrial production lines
- Secondary pressure regulation in multi-stage pneumatic control systems
- Pneumatic tool and equipment air supply conditioning
- Industrial automation and robotic actuator pressure control
- Mobile equipment and portable compressor setups
- Manufacturing and machine tool air preparation
Compatibility & Replacements
Compatible With
- All 3/4″ NPT pneumatic ports and standard piping systems
- Industrial compressed air compressors (stationary and portable)
- Pneumatic actuators, cylinders, and air motors
- Air-driven tools and equipment requiring 5–125 psi regulation
- FRL (Filter, Regulator, Lubricator) modular systems with 3/4″ NPT interfaces
- Standard pneumatic system designs using SAE and metric pressure gauges
Replaces / Drop-In Replacement For
- Arrow R376 (original model designation)
- Arrow part number 1586 (legacy part number)
- Other mid-flow 3/4″ NPT regulators in the 5–125 psi range with equivalent flow ratings
Works With
- Standard pneumatic gauge pairs (0–160 psi or 0–250 psi) via 1/4″ gauge port
- Pneumatic pressure transducers and electronic pressure switches (optional, gauge-port mounted)
- SAE ported manifold blocks and aluminum extrusion subplates
- ISO 1219 pneumatic control circuit designs
- Compatible with all compressed air media (filtered, non-lubricated or standard oil-mist lubricated air)
