Taps are those that regulate and provide connections between different parameters of a technological process, such as flow, pressure, temperature etc. They are used when maintaining the set pressure is required. Because they use a variety of closing organs (valves, plugs, membranes etc), they are found in various types of industrial installations. In choosing the appropriate tap, manually or automatically operated properly, it must take into account the pressure and temperature of the fluid itself, sufficient sealing against the environment and acting closure body.