Festo GRLA-1/8-QS-6-D 193144 One-Way Flow Control Valve G1/8 to 6mm

Festo GRLA-1/8-QS-6-D is a one-way flow control valve with non-return function for precise regulation of piston speed in pneumatic systems. It permits stepless flow adjustment in one direction while allowing free flow in the reverse direction. The valve features a G1/8 male thread on port 2 and a QS-6 push‑in fitting on port 1 for 6 mm OD tubing. The slotted head screw allows simple adjustment with a screwdriver. After installation, the compact metal body can be swivelled 360° to accept tubing from any direction. Made from anodised wrought aluminium alloy with NBR seals. Designed for cylinder speed control in factory automation, packaging machinery, and material handling equipment.

Applications:

• Pneumatic cylinder speed control (meter‑out)

• Flow regulation in factory automation and assembly lines

• Packaging and material handling equipment

• OEM pneumatic system integration

Core Specifications:

• Pneumatic connection, port 1: QS-6 (push‑in fitting for 6 mm OD tubing)

• Pneumatic connection, port 2: G1/8 male thread (BSPP) ✅

• Valve function: Exhaust air one‑way flow control with non-return function

• Adjusting element: Slotted head screw

• Standard nominal flow rate (flow control direction): 185 l/min

• Standard nominal flow rate (non‑return direction): 160–240 l/min

• Operating pressure range: 0.2 … 10 bar

• Ambient / media temperature: –10 °C … +60 °C

• Operating medium: Compressed air per ISO 8573‑1:2010 [7:4:4] (lubricated operation possible, but if applied, continued lubrication required)

• Body material: Wrought aluminium alloy (anodised)

• Seal material: NBR (nitrile rubber)

• Product weight: approx. 22 g

Advanced Specifications:

• Standard flow rate (6 → 0 bar, flow control direction): 370 l/min

• Standard flow rate (6 → 0 bar, non‑return direction): 330–390 l/min

• Nominal torque: 3 Nm (±10 %)

• LABS (PWIS) conformity: VDMA24364‑B1/B2‑L

• Cleanroom suitability: Class 4 according to ISO 14644‑1

• RoHS compliant

System Integration:

• The QS‑6 push‑in fitting accepts 6 mm OD tubing (e.g., PUN, PAN, PEN series).

• Use in the exhaust air path (meter‑out) for stable cylinder motion.

• Mounting position any. Tighten G1/8 thread with nominal torque 3 Nm.

• For detailed wiring and configuration, refer to the product hardware manual.

Standards & Compliance:
Refer to manufacturer official documentation for detailed certification and compliance information.

Related Products:

• GRLA-1/8-QS-6-RS-D – Same function, rotary knob adjustment

• GRLA-1/4-QS-6-D – Larger G1/4 thread port, higher flow

• GRLA-M5-QS-6-D – M5 thread port for compact applications

• QS-6 push‑in fittings and 6 mm tubing for system extension