Abstract: A method and apparatus for simultaneously cleaning both seat surfaces of a double seat valve particularly adapted for use in the food processing industry is disclosed. The valve includes a pair of closing elements movable relative to the valve seats and to each other to define valve open and valve closed positions and a controllable stop and controllable connector which provide a partially lifted cleaning position in which both seat surfaces are simultaneously exposed to a cleaning agent while at least one of the closing elements continues to be in contact with product. The position of the closing elements relative to each other and relative to the valve casing is interlocked by the stop and the connector so that no cleaning agent enters the product side of the valve.

Abstract: The invention relates to a cleanable sampling valve to be incorporated into the product line supplying the samples. With such a valve, it is ensured that repeated sampling during one long-time product charge passage will take place under optimum sterile conditions and any entrainment of product into the sealing area and the consequent risk of reinfection emanating from that area will be precluded. In addition, it is ensured that no intermixing of the product or the product sample with the cleaning or disinfecting agent will be possible.

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