mpo55Mizuno MP-55 Yoro Craft Irons – In Japan Mizuno offers the MP-55 instead of the MP-25 why? I don’t know but I do know after hitting the MP-55’s that they are indeed specialDanfoss MP 55 Differential Pressure switches delay of relay 90 sec. 060B017291 Adjustment Cut out for falling pressure. Ambient temperature -40 - 60 °C. Ambient temperature -40 - 140 °F. Ammonia application No. Approval CCC, CE,