INTERNAL GEAR ELECTRIC PUMPS FOR LUBRICANTS. 230 V - 50 HZ (SINGLE PHASE) OR 400 V - 50 HZ (THREE PHASE) MOTOR DEPENDING ON MODEL, IP-55 PROTECTION AND ON/OFF SWITCH. CAST IRON PUMP BODY, SINTERED STEEL GEARS AND BY-PASS VALVE. MOTOR WITH MOUNTING FEET, THE PUMP CAN BE MOUNTED HORIZONTALLY ON A FLAT SURFACE OR VERTICALLY TO A WALL. MODELS WITH ELECTRONIC PRESSURE SWITCH START AUTOMATICALLY WHENEVER A PRESSURE DROP IN THE DISTRIBUTION LINE OCCURS (I.E. WHEN A DELIVERY GUN IS OPENED) AND STOPS ONCE PRESSURE IS BUILT AGAIN IN THE LINE (I.E. WHEN A DELIVERY GUN IS CLOSED).