FESTO Pneumatic Valves Check valve 611027 - FESTO 193144, The Festo check valve 193144, GRLA-1/8-QS-6-D, operates at pressures from 0.2 up to 10 bar. This durable component is ideal for controlling air flow in pneumatic systems. Typical applications include use in automation and manufacturing environments. FESTO 193144 Check valve 0.2-10 bar GRLA-1/8-QS-6-D 1pc