JOAP - Pressureswitches

Operating Principles SPDT SPST for CO2 NSDHA - NSDLA - NSDHM NSDCA Operating principle Stainless steel diaphragm expands and contracts itself under the effect of pressure. Increasing pressure contact (H) opens, and contact (L) simultaneously closes. Decreasing pressure contact (L) opens and contact (H) simultaneously closes. Stainless steel diaphragm flexes and contracts itself under the effect of pressure. the movement of the diaphragm actuates a plunger, which operates the opening or the closing of the electrical contact. The switch automatically resets when pressure reaches, by decreasing the nominal value. Typical Application Mainly used in refrigeration and air-conditioning systems. Specially designed and manufactured for refrigeration systems using CO2 and equipments with high pressures over 55 bar. Pressure range -1 ~ 55 bar 90 ~ 180 bar Burst Pressure 345 bar 720 bar Contact rating 24Vac 125VA; 240Vac 375VA 24Vac 125VA; 240Vac 375VA Cycles life 100.000 AUTOMATIC RESET / 10.000 MANUAL RESET 30.000 Approvals CE0035 - PED CAT IV CE0035 - PED CAT IV Proof pressure at working pressure <10 bar 17 bar 180 bar 10…27,5 bar 41 bar / >27,5 bar 55 bar / Electric Drawing SPDT Normal Close Structure Drawing