Pilot Operated Pneumatic Regulator SMC AR625-10 Rc1" 0.05-0.83 MPa Air Pressure Valve

The SMC AR425 to AR935 series represents a line of internally pilot-operated, relieving-type air pressure regulators. These devices are specifically engineered for heavy-duty industrial compressed-air systems where maintaining a stable outlet pressure along with a high flow capacity is crucial. Unlike direct-acting regulators, these pilot-operated models utilize the supply air itself to control the main valve. This design approach ensures superior pressure regulation accuracy, smoother flow characteristics, and reduces fluctuations in the outlet pressure when changes occur in the inlet pressure.

This product range includes 12 popular part numbers across four different sub-series: AR625, AR635, AR825, and AR835. These regulators come with port sizes varying from Rc 3/4" up to Rc 1-1/2". There are two available pressure ranges to suit various applications: a 0.05 to 0.83 MPa range (known as the 25 type) and a lower 0.02 to 0.2 MPa range (35 low-pressure type). Models labeled with a "G" come equipped with a panel pressure gauge, and an optional mounting bracket, B25P, can be added for installation convenience.

The versatility and reliability of these air pressure regulators make them widely applicable in numerous industrial settings. Common uses include compressor stations, central compressed-air pipelines, automated production lines, pneumatic manipulators, and OEM machine packages. Their robust construction and precise control capabilities make them an essential component for ensuring efficient and stable operation in demanding compressed-air environments.

This regulator features a pilot-operated design that ensures a much more stable outlet pressure compared to direct-acting regulators. It remains unaffected by fluctuations in the inlet pressure, providing consistent performance even in varying conditions.

Equipped with an internal relieving mechanism, the regulator automatically vents any excess outlet pressure to the atmosphere. This function helps maintain a constant downstream line pressure, enhancing safety and reliability.

The body of the regulator is constructed from die-cast aluminum, which includes a protected bonnet and chamber. This design not only makes the regulator lightweight but also offers excellent heat dissipation, making it ideal for use in demanding factory floor environments.

Two adjustable pressure ranges are available to suit different applications: 0.05 to 0.83 MPa (model 25) and 0.02 to 0.2 MPa (model 35, a low-pressure precision type). This flexibility allows for precise control over the operating pressure according to specific needs.

The regulator supports multiple port sizes including 3/4", 1", 1-1/4", and 1-1/2". Additionally, thread options such as Rc (PTF), NPT (F), and G threads can be provided upon request to accommodate different piping requirements.

For enhanced usability, an optional pressure gauge (denoted by the G suffix, from the G46 series) and a mounting bracket (model B25P) are available. These accessories provide clear local pressure readings and facilitate easy retrofit installations.

To prevent accidental adjustments and maintain set pressures, a locking screw is included on the adjusting handle. This feature ensures that the regulator remains securely calibrated after its settings have been finalized.