Parker R45-03C Miniature Air Regulator 35 Cfm 150 Psi

Product Description

The PARKER R45-03C is a miniature compressed air regulator designed to control and maintain downstream air pressure in pneumatic systems. Part of the R45 series, it accepts supply pressures up to 150 psi and regulates output across a range of 0 to 125 psi, making it suitable for precision pressure control in compact installations. The unit flows up to 35 CFM and features an integral relief function that vents excess downstream pressure when the regulator is adjusted downward. The plastic body keeps weight low at 0.38 pounds. A licensed pneumatic technician or industrial mechanic is the typical installer.

The R45-03C is used in compressed air distribution systems where space is limited and a full-size regulator would be impractical. It connects via 3/8 inch NPT ports, fitting standard compressed air branch lines and point-of-use applications such as tool drops, pneumatic control circuits, and light industrial automation. A 1/4 inch gauge port thread allows a pressure gauge to be added downstream if monitoring is required, though no gauge is included with this unit. The regulator is rated for use in fluid service with compressed air only.

Key Features

• Miniature R45 series form factor for space-constrained panel or inline installations
• 0 to 125 psi output pressure range with up to 150 psi supply pressure
• 35 CFM maximum air flow capacity
• Built-in relief function vents excess downstream pressure during setpoint reduction
• 3/8 inch NPT end connections for standard compressed air plumbing
• 1/4 inch gauge port thread for optional downstream pressure monitoring

Compatibility

Designed for use with compressed air systems only. Connects to standard 3/8 inch NPT compressed air lines in residential, commercial, or light industrial pneumatic installations.

Installation Notes

Installation should be performed by a qualified pneumatic technician or pipefitter familiar with compressed air system safety practices. Depressurize and lock out the upstream air supply before making any connections. Apply thread sealant appropriate for pneumatic service to all NPT connections. Do not exceed the 150 psi maximum supply pressure rating, and ensure the operating temperature remains at or above 40 degrees F.