APPLICATION: The type oil gear pump AD-L is ideally suited in single-line centralized lubrication systems. In these systems, lubricant is being delivered intermittently under pressure (pressurizing - and relief cycles) through the main feed lines towards the meter elements installed downflow and from there through the lube lines to the points of application. FUNCTION: The oil lubricator basically consists of a gear pump with A.C. single-phase motor, the oil reservoir, the electronic control unit and a valve which ensures that the line is depressurized when the A.C. single-phase motor is switched off (relief cycle). An integral pressure relief valve is opened as soon as reaching a pressure of 2 MPa (20 bar) thus protecting the oil gear pump from damage in the event of an overpressure situation occuring. After relief the main line, the valve maintains a resudial pressure of approx. 0.08 MPa (0.8 bar) and thus prevents that the main line runs empty. The entire system is either time- or pulse controlled, at choice.