Festo GRLA-1/4-QS-8-RS-B One-Way Flow Control Valve 650l/min G1/4

Overview
The Festo GRLA-1/4-QS-8-RS-B (part number 162968) is a high-performance one-way flow control valve from the GRLA series, designed for precise exhaust air regulation in pneumatic systems. This valve effectively combines a check valve function for free flow in one direction with an adjustable throttle for controlled flow in the opposite direction, making it ideal for regulating the piston speed of pneumatic cylinders, particularly for double-acting cylinders. Its exhaust air flow control function ensures smooth and consistent actuator movement, critical for machine reliability.

The valve features a QS-8 push-in connector for 8 mm OD tubing on the supply side and a male G1/4 thread on the outlet, allowing for quick and secure installation. A knurled screw provides manual, tool‑based flow adjustment, allowing for precise metering of airflow. The unit can be swiveled 360° after mounting, allowing for flexible installation in tight spaces.

Constructed from durable materials, including a wrought aluminum alloy threaded plug, a PBT-reinforced swivel fitting, and NBR/TPE-U(PU) seals, the valve offers a corrosion resistance class of 2 for moderate industrial stress. With a high flow rate of 650 l/min in the control direction and up to 1,260 l/min in the free-flow direction, it ensures efficient cylinder actuation. The valve operates at a pressure range of 0.2 to 10 bar and a temperature range of -10°C to +60°C. It is RoHS compliant and suitable for a wide range of industrial automation applications, including assembly lines, packaging machinery, and robot systems.

Key Features

• One-Way Flow Control Valve – Provides free flow in one direction and adjustable, metered flow in the opposite direction, ideal for precise piston speed regulation.

• Exhaust Air Flow Control Function – Regulates the exhaust air from a cylinder, ensuring smooth and stable actuator movement.

• QS-8 Push-In Connector – Tool‑free connection for 8 mm OD tubing, reducing installation and maintenance time.

• G1/4 Male Thread – Standard port size for easy integration into existing pneumatic systems.

• High Flow Rate – 650 l/min standard nominal flow rate in the control direction, with up to 1,260 l/min in the free‑flow direction at 6 bar, ensuring high system efficiency.

• Wide Operating Pressure Range – Reliable operation between 0.2 and 10 bar, suitable for vacuum and compressed air applications.

• Robust Metal Construction – Wrought aluminum alloy and PBT-reinforced components provide excellent durability and corrosion resistance (CRC 2).

• 360° Rotatable – The push‑in connector can be swiveled 360° after mounting, allowing for flexible alignment in any installation position.

• 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 speed control of pneumatic actuators, such as regulating the piston speed of double‑acting cylinders, in pick‑and‑place systems, automated assembly lines, packaging machinery, material handling equipment, and robotic systems.

Package Includes

• 1 x Festo GRLA-1/4-QS-8-RS-B One‑Way Flow Control Valve (162968)

• Note: Fittings and tubing are sold separately.