Festo GR-3/8-B One-Way Flow Control Valve G3/8 1010L/min 10bar

Overview
The Festo GR-3/8-B (part number 6308) is a high-performance one-way flow control valve from the GR series, designed for precise pneumatic flow regulation in industrial automation systems. This valve reliably combines an adjustable throttling function with a robust non-return (check) mechanism, enabling unidirectional flow control for applications such as exhaust air throttling of double-acting cylinders or inlet flow control of single-acting cylinders.

The valve features two G3/8 female threaded ports for inline installation, with a knurled screw for simple, tool‑based adjustment of the flow rate. It delivers a standard nominal flow rate of 1,010 l/min in the flow control direction, and 1,150 l/min in the non-return (free‑flow) direction. With an operating pressure range of 0.1 to 10 bar and a wide temperature range of -20 °C to +75 °C, this valve is suitable for both compressed air and vacuum systems.

The valve is constructed with a die‑cast zinc housing and NBR seals, offering excellent corrosion resistance and durability for demanding industrial environments. It is ATEX certified for use in potentially explosive atmospheres (Zones 1, 2, 21, 22), RoHS compliant, and carries global safety certifications. The valve supports optional front panel mounting with through-holes for flexible installation, and its any-position mounting capability simplifies system integration.

The GR-3/8-B is ideal for a wide range of applications, including automated production lines, material handling systems, packaging machinery, and general industrial pneumatics.

Key Features

• One-Way Flow Control Function – Combines precise, adjustable throttling with a reliable non-return check valve mechanism, enabling unidirectional pneumatic speed control.

• G3/8 Female Threaded Ports – Standard port size for easy inline integration into existing pneumatic systems.

• Knurled Screw Adjustment – Intuitive, tool‑based flow rate adjustment for precise actuator speed regulation.

• High Flow Capacity – Delivers 1,010 l/min standard nominal flow in the control direction and 1,150 l/min in the non-return direction for efficient cylinder actuation.

• Wide Operating Pressure Range – Operates from 0.1 to 10 bar, suitable for both compressed air and vacuum applications.

• Broad Temperature Range – Rated for -20 °C to +75 °C, suitable for diverse industrial environments.

• Durable Construction – Die‑cast zinc housing with NBR seals provides excellent corrosion resistance and long-term durability.

• ATEX Certified – Compliant with ATEX zones 1, 2, 21, and 22 for safe operation in potentially explosive atmospheres.

• RoHS Compliant – Meets environmental standards for restricted substances.

• Original Brand New, Within Warranty Period – Genuine Festo product, brand new in sealed packaging, covered by manufacturer's warranty.

• 100% Satisfaction Guarantee – Your purchase is protected by our satisfaction guarantee; return or exchange if not completely satisfied.

Technical Specifications

Applications
Ideal for precise pneumatic flow control in automated production lines, material handling systems, packaging machinery, and general industrial pneumatics. Suitable for regulating piston speed of double-acting cylinders (exhaust air throttling) and single-acting cylinders (inlet flow control).

Package Includes

• 1 x Festo GR-3/8-B One‑Way Flow Control Valve (6308)