Abstract: Apparatus for cleaning a liquid connection and securing a stroke and spring abutment for double seat pipeline switches with leakage control, comprising a pipeline switch housing, a pipeline switch drive mounted within the switch housing, two valve disks of different sizes, two concentrically mounted valve rods of different lengths, one of the valve rods being hollow, the one of longer length fitting within the other of shorter length, the inside valve rod being connected to the pipeline switch drive and the smaller of the two valve disks, the inside valve rod upon being lifted by the drive carrying along the valve disk of larger size, the valve disks in both the closed position and the open position enclosing between themselves a leakage cavity, one end of the hollow valve rod defining a pressing and guide part with a spring abutment and a connecting opening adapted to receive a cleaning fluid, a rod head forming a portion of the longer valve rod and defining a connecting opening, an upper spring abutment and

Abstract: Apparatus for cleaning a liquid connection, securing a stroke and spring abutment for double-seat pipeline switches with leakage control, comprising two valve disks of different sizes which are movable relative to each other and independently of each other, the smaller valve disk facing away from a drive rigidly connected via a valve rod with a pipeline switch drive and, upon its lift motion after a given partial stroke, positively carrying along with it the other, larger valve disk, the valve rods of the valve disks pointing in the same direction and engaging telescopically into each other with the end of the hollow valve rod which concentrically surrounds the other valve rod receiving, outside the pipeline switch housing, in a form fitting manner, a pressing and guide part, equipped with a lower stop surface and spring abutment, the valve disks both in the closed position and in the open position enclosing between themselves a leakage cavity which is connected via openings with a discharge bore leading into

Abstract: A process for cleaning tank interiors uses a rotary element and a cleanser discharge nozzle and monitors the completion of each full revolution of the rotary element. The cleanser quantity made available per unit of time is monitored and/or controlled or regulated. In the process, the time of each revolution of the rotary element is monitored in such a fashion that said time is represented by the spacing in time of two voltage pulses, with the last voltage pulse serving as a reset pulse for the monitoring time. The monitoring time represents the requirement of a sufficient cleaning effect and exceeds by an adjustable percentage the set time of revolution for a rotary element. In the event each rotary element revolution is completed within the monitoring time, the monitoring begins anew. In the event that the time of revolution of the rotary element exceeds the monitoring time, an electrical, optical, or acoustical malfunction or control signal is given.