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The Danfoss KVL22 is a crankcase pressure regulator designed for use in refrigeration and air conditioning systems. It controls the suction pressure at the compressor crankcase to protect the compressor from excessively high suction pressures during startup or after a defrost cycle. HVAC and refrigeration technicians rely on crankcase pressure regulators to prevent compressor damage caused by liquid floodback and overloading. The KVL22 is installed in the suction line between the evaporator and the compressor inlet. It acts as a back-pressure valve, holding the crankcase pressure below a set maximum and allowing the compressor to come up to speed safely before full system pressure is applied. This valve is especially critical in low-temperature refrigeration systems, supermarket display cases, cold storage units, and commercial air conditioning applications where compressor protection is essential. The KVL22 features 22mm solder ODF connections on both the inlet and outlet, making it straightforward to braze into standard copper suction line assemblies. The valve carries a Kv flow coefficient of 3.2 cubic meters per hour, supporting adequate flow capacity for the system sizes this valve is rated for. It is built to handle a maximum working pressure of 18 bar, meeting the demands of most commercial refrigeration circuits. The compact design keeps installation clean and accessible in tight mechanical spaces. Replacement of a worn or failed crankcase pressure regulator with the Danfoss KVL22 restores reliable compressor protection and extends equipment service life. This valve is a direct fit for systems originally equipped with Danfoss KVL series regulators.
The Danfoss KVL22 crankcase pressure regulator provides dependable compressor protection in commercial refrigeration and air conditioning systems. Its 22mm solder ODF connections and robust 18 bar pressure rating make it a reliable choice for professional refrigeration service and installation work.
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