Aseptic Diaphragm Valves And Process Equipment, Bellows Valves In Comparison - Pharmaceutical

Aseptic production processes, the most commonly used Valve Is a diaphragm valve

, usually referred to as Diaphragm Valve . The reason why the production process used in aseptic diaphragm valves, first, because of its simple structure, second, it is cheap, which makes it so far almost no "competitors." The only way to compete with the diaphragm is the so-called bellows globe valve, known as bellows valves. This bellows globe valve because of its price is too high, despite a better technology than the diaphragm edge, but still very difficult to contend with the diaphragm, such as described in this article.

PTFE bellows Process industries in the sterile field, "bellows the competition between the valve and diaphragm," a long time. For a long time, diaphragm valve with its simple structure, low cost and convenience of cleaning and disinfection take an advantage. Compared with the diaphragm valve, bellows valve in the market, too few varieties and specifications. Today, Tuchenhagen production Vesta bellows valve is to fill this gap, this paper valve on the diaphragm and bellows comparison of advantages and disadvantages of the two valves is more clear.

Empty properties When the need to use the diaphragm when the level of pipeline, the manufacturer must ensure that in accordance with the provisions of diaphragm valve angle in the horizontal pipe installed diaphragm valve, or in process equipment operation, the diaphragm empty encounter some problems not fully discharged Body In the medium. However, different types of diaphragm valves, diaphragm valves from different manufacturers, different nominal flow diaphragm valve installation angle is different, often to the design and manufacture of sterile process equipment has brought a lot of trouble. T-type structure in the diaphragm, this empty body is showing even more significant.

Compared with the diaphragm, Vesta bellows valve is not such a problem, regardless of Vesta valve body is a bellows which structure, process equipment in the run-time load will not appear "dead" cut off pipelines in order to ensure closely. Moreover, it can be installed according to different installation of equipment in a sterile process piping systems.

In the pharmaceutical industry, the aseptic process equipment from a number of horizontal pipe and vertical pipe, composed in Pharmaceutical Equipment The design, location and as pipeline technical reasons, must be installed in a specific location using this bellows valve. For example, if the vertical pipe installed in the diaphragm, must be in the same horizontal plane through one 90 elbow connection. The T-type diaphragm structure has very high production costs, and different body structure compared to shape the diaphragm, bellows valves in the size and shape on pipeline connection with the installation advantages. The structure of the two types of valves of different types, so in the early stages of aseptic process equipment design, we must select the best should be used in various parts of the type of valve.

In medicine, food and biotechnology in the output device has a large number of valves required to be sterilized. The large valves, such as Stericom series, in which situations require sterile almost useless. Because, in these processes devices require less and less transport of medium quality, the less traffic, people almost invariably chosen diaphragm. The new bellows valve has a smaller size, can be equipped with different pipe diameters used in this more competitive than the diaphragm. Comparison

equipment utilization As equipment users throughout the life cycle of the equipment as much as possible the use of equipment for production, that is: the utilization of equipment should be as high as possible. And maintenance of equipment, said equipment must be to stop production, but also to put some equipment maintenance costs. Bellows valves generally wear phenomena; in diaphragm valve, the valve once the wear, after a certain time must be replaced using the diaphragm, diaphragm life depends on the corresponding production process. On the one hand, process equipment in the flow of media corrosion, pipeline cleaning and disinfection of the temperature, process equipment, work pressure and flow parameters, etc. will affect the membrane life; the other hand, diaphragm type valve opening and closing when the membrane deformation membrane life is also an important factor in the decision.

With pneumatic actuators Vesta bellows globe valve

Most of the diaphragm is not damaged because of the use of the production process, on the contrary, because of mechanical compression and damage. Although the diaphragm of the diaphragm have different flexibility levels have different coatings, and different PTFE guard, but, for all the diaphragm valves are invisible from the outside wear (caused by in-house media surface corrosion and particulate attachment) . Therefore, in order to avoid the sterile production processes diaphragm damage due to forced to stop production in practice is usually required before the change of membrane life. Thus, both the number of mandatory replacement diaphragm, or the resulting maintenance costs, or equipment downtime, than PTFE bellows valves were significantly more, while bellows valves Another advantage: can be used for almost all kinds of process production process.

Core components

Vesta bellows valve is TFM1705PTFE manufacture key components of the cut-off bellows which, in addition to corrosion resistance of various chemical mediators in addition, TFM1705 material also meets FDA CFR 21 177.1550 on "perfluorocarbons resin "requirements. The smooth surface (Ra 0.8mm), reliable sealing, large switching distance movement characteristics of these features, the best of CIP / SIP cleaning disinfection are very favorable. More than three years, this patented technology, bellows valves successful foothold in the market, and aseptic processes in the pipeline will be strictly inside the tubes and pipes to cut themselves off from the atmospheric environment.

by: gaga

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