Festo – 530043 (HGL‑3/8‑QS‑8) – Piloted Check Valve, QS‑8 × G⅜

Main Features

• Manufacturer: Festo AG

• Model/MPN: 530043 (HGL‑3/8‑QS‑8)  

• Valve Type: Piloted (unlockable) check valve — normally prevents flow from port 2→1 unless pilot pressure applied  

• Connections:

  • Port 1 (inlet): 8 mm push-in tube (QS‑8)

  • Port 2 (outlet): G⅜ threaded male

  • Pilot port 21: G¼ threaded male  

• Operating Pressure: 0.5–10 bar; pilot pressure 1–10 bar  

• Flow Rate: ~830 L/min at Δp = 1 bar; up to 1,200 L/min at Δp = 6–0 bar  

• Materials & Seals: Die-cast zinc/aluminum body; NBR seals; POM release ring; RoHS compliant  

• Temperature Range: –10 °C to +60 °C  

• Mounting: Screw-in via male G⅜ thread; torque approx. 12.5 Nm  

• Design Features:

  • Compact (55 g) and corrosion-resistant, Class 2

  • Supports optional lubricated air, IP20, suitable for pneumatic braking or locking in actuators  

• Typical Applications: Position retention in pneumatic systems, pressure-holding in cylinders, safety circuits, and actuator end-of-travel lock