Fermented soft sealing valve should be adopted

Valves are the most used in the fermentation equipment ancillary equipment, which is the most used cut-off valve. Sealing valve on the media can be divided into four, namely nominal level, low leakage level, steam level and atomic level. Nominal level and low leakage level seal for valve closure requirements are not strict, for example, used to control the flow rate of the valve. Steam level sealing for steam and most other industrial valve seat, stem and body connection portion of the seal. Atomic level meter seal for sealing medium demanding applications, such as spacecraft and nuclear power equipment. Since the fermentation industry using high-temperature steam sterilization equipment for fermentation, so the valve sealing requirements of the media is a steam-tight.

Since the valve open during fermentation frequent often affected by corrosion, erosion and cavitation damages, so the valve vice structure, that contact between the valve seat and closure member for closing part of the selection is more critical. Vice-sealing valve structure divided into soft seal and hard seal two kinds. Hard seal structure sealing seat and closed by the occurrence of tiny pieces of plastic deformation squeeze each other to form a closed circular sealing contact line. Although such valve sealing effect in the application of the initial well, but more frequently fermentation valve open, easy to wear of the contact wire previously formed, or leaving the sealing surface of the pipe indentation dirty and damage. The seal of the sealing structure of the elastic deformation is small, the formation of new sealing contact line is very difficult, so long-term use may cause valve leakage, the fermentation failure. Soft sealing valve closure member generally use soft pads, the use of large plastic deformation gasket forming an annular sealing contact with a wide belt, to add plug sealing surface uneven, to eliminate the gap to form a seal. Its precision generally do not ask, if there are special requirements, body material can be stainless steel, soft wire seal off pieces with replaceable PTFE gasket, so that can be changed frequently to ensure that the valve PTFE gasket tightness