Valve function piloted non-return function Pneumatic connection, port 1 G1/4 Pneumatic connection, port 2 G1/4 Type of actuation pneumatic Pilot air port 21 G1/8 Mounting type Threaded with external (male) thread Operating pressure 0.5 ... 10 bar Pilot pressure 2 ... 10 bar Ambient temperature -10 ... 60 °C Operating medium Compressed air in accordance with ISO8573-1:2010 [7:4:4] Maritime classification see certificate Assembly position Any Standard flow rate 1 -> 2 from 6 to 0 bar 680 l/min Standard nominal flow rate 1 -> 2 from 6 to 5 bar 550 l/min Note on operating and pilot medium Lubricated operation possible (subsequently required for further operation) Corrosion resistance classification CRC 2 - Moderate corrosion stress Storage temperature -10 ... 60 °C Medium temperature -10 ... 60 °C Pilot medium Compressed air in accordance with ISO8573-1:2010 [7:4:4] Nominal tightening torque 11 Nm Tolerance for nominal tightening torque ± 10 % Product weight 41.2 g Materials note Free of copper and PTFE Conforms to RoHS Material seals NBR Material hollow bolt Wrought Aluminium alloy Anodised Material release ring POM Material non-return sleeve NBR Material swivel fitting Zinc die-casting