mpo55Last updated: 30042025 05:21:23. DIFF.PRESS.CTRL-MP55-170 Product Code Product group: 604 Product number: 547588Danfoss MP 55 Differential Pressure Switch is used in refrerating systems with R717 and also systems with HCFC and non-flammable HFC refrerants. MP 55 Pressure Switch has a fixed