Aseptic production process, the most commonly used cut-off valve is a diaphragm valve, usually referred to as the diaphragm valve. The reason why the diaphragm valve in the aseptic production process, first, because of its simple structure, and second, its low price, which makes it so far almost no "competitors." The only valve that can compete with a diaphragm valve is the so-called bellows globe valve, the so-called bellows valve. Due to its high price, this bellows globe valve, despite its superior technical advantages over diaphragm valves, remains difficult to contend with diaphragm valves as described herein. PTFE Bellows "The competition between bellows and diaphragm valves in the aseptic process industry has a long history. For a long time, the diaphragm valve with its simple structure, low cost and convenient cleaning and disinfection and occupy an advantage. Compared with the diaphragm valve, bellows valve in the market variety of specifications too little. Today, Tuchenhagen Vesta corrugated pipe valve is to fill this gap, the paper compares the diaphragm valve with bellows, the advantages and disadvantages of both valves more clearly. Emptying Performance When diaphragm valves are to be used in horizontal pipelines, it must be ensured that a diaphragm valve is installed in the horizontal pipe in accordance with the diaphragm valve manufacturer's specifications or the diaphragm valve will experience some problems during the operation of the process equipment and can not be completely Vent the body of media. However, different types of diaphragm valves, diaphragm valves manufactured by different manufacturers, different nominal flow rate of the diaphragm valve installation angle is different, and often to the design and manufacture of aseptic flow of process equipment has brought great trouble. In the T-type diaphragm valve, the problem of this empty body is more obvious. Vesta bellows valves do not suffer from this problem when compared to diaphragm valves. No matter what the body structure of the Vesta bellows valve, there is no "dead corner" during the no-load operation of the process equipment to ensure tightness To cut off the pipe. Moreover, it can be installed in a variety of installation methods in aseptic process piping systems. In the medical manufacturing industry, aseptic processing equipment consists of many horizontal and vertical pipes. In the design of pharmaceutical equipment, such bellows valves must be installed and used in specific locations due to pipe location and technical reasons. For example, if a diaphragm valve is installed in a vertical pipe, it must be connected by a 90 ° elbow in the same horizontal plane. The T-type structure of the diaphragm valve production costs and high, compared with the diaphragm structure of different valve body shape, the bellows valve in size and shape, with the pipe connection and installation more advantages. As the two types of globe valve structure of different types, therefore, in the initial design of aseptic flow process equipment, should choose the various parts should choose which type of globe valve. The output devices in the fields of medicine, food and biotechnology have a large number of valves that need to be sterilized. Large valves, such as the Stericom series, have little if any of these sterilization needs. Because, in these process equipment, the amount of media required to transport less and less, with less flow, almost indiscriminate selection of the diaphragm valve. The new bellows valve has a smaller volume, with different pipe diameter with, in this regard more advantages than the diaphragm valve. Equipment utilization comparison As a user of the equipment, use the equipment as much as possible throughout the life cycle of the equipment, meaning that equipment utilization should be as high as possible. The equipment maintenance means that the equipment must stop production, but also put some equipment maintenance costs. Bellows valves are generally worn; in the diaphragm valve, valve wear, after a certain period of time must be replaced diaphragm, diaphragm life depends on the length of the corresponding production process. On the one hand, the process equipment flow medium corrosion, pipe cleaning and disinfection temperature, process equipment working pressure and flow and other operating parameters will affect the life of the diaphragm; the other hand, the diaphragm-type valve on and off diaphragm deformation It is also an important factor that determines the diaphragm's service life. Vesta Bellows Shut-Off Valves with Pneumatic Actuators Most diaphragm valves are damaged not for use during production but rather for mechanical crushing. Although diaphragm diaphragms have different degrees of resilience, different coatings, and different PTFE shields, there is external invisible wear to all diaphragm valves (surface erosion and particle adhesion caused by internal media) . Therefore, in order to avoid the production of aseptic process being forced to stop due to the damage of the diaphragm valve, in practice, it is common practice to change the diaphragm before the specified service life. As a result, both the number of diaphragms forced to be replaced, resulting in maintenance costs, or equipment downtime is significantly greater than the PTFE bellows valve, and another advantage of the bellows valve: almost used for Process of production process. Core Components The key component of the Vesta bellows valve is the cut-off bellows made of TFM1705 PTFE. In addition to being resistant to corrosion by various chemical media, the TFM1705 material also meets FDA Code of Federal Regulations §177.1550 on "Perfluorocarbons Resin "requirements. Its smooth surface (Ra ≤ 0.8mm), reliable sealing, large switching distance and other characteristics of these characteristics, for the best CIP / SIP disinfection and cleaning are very beneficial. For more than three years, this patented bellows valve has succeeded in gaining a foothold in the market and is able to strictly isolate the inside of the pipe from the atmospheric environment outside the pipe in aseptic pipe.
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