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NEW Nilfisk Hot Pressure WashersPressure WashersMachine Parts by BrandPumps & SparesPopular High Pressure HosesHose ReelsNozzlesPressure Washer TriggersUnloader ValvesInterpump Service KitsPressure regulating valves for setting and controlling the working pressure of Pratissoli high pressure industrial pumps. The range includes Pratissoli R1503, R1510, R1520 and R2L regulators, R3 regulators in high and low pressure versions, R3X regulators in AISI 316 stainless steel, and the Interpump Timax100 pressure regulator.