“FOR AUX.BOILER BURNER, WATER HYDROPHORE MAKER: JANGSUYUANWANG INSTRUMENT” “PRESSURE SWITCH FOR BOILER MGO PUMP & PRESSURE SWITCH FOR WATER TYPE: YWK-50-C;RANGE: 0-1.0 MPA SWITCH DIFFERENCE <0.07 >0.25 AC 380;3A: DC 250V;25A;SH09T00122″