The oil level regulators control the level of oil of each compressor’s crankcase through a floating valve. The oil level regulators are manufactured with a flange to be assembled directly to the compressors where the oil sight glass is commonly found. The oil is feed to the regulator from the oil receiver, which in turn receives oil from the oil separator. P max: 31 bar The oil level regulators are installed between the suction line and the oil receiver, maintaining a differential pressure in the oil vessel above the crankcase’s oil pressure.