0.5 BAR ROSC 0.5BAR HYDR. RET VALVE, SIZE 20, BASIC NAME VALVE MODIFIER NAME HYDRAULIC CHECK VALVE THREADED TYPE SPRINGLESS RETURN ASSEMBLY ON PIPE LINE DRAIN CONNECTION WITHOUT DRAIN CONNECTION BSP CONNECTION DIAMETER 1“ PACKING NITRILE RUBBER SEAL MAXIMUM WORKING PRESSURE 315 BAR OPENING PRESSURE 0,5 BAR NOMINAL SIZE 20