Diaphragm valve

Diaphragm valves provide a way to control fluids (gases, steam, liquid). In particular, highly viscous andor high adhesive media so that, for example, distributed or dispensed. In other principles such as valve seat valves, these fluids would partially deposited in the valve body. At worst, it could lead to cross-contamination. Therefore, the valves are referred to on the basis of the principle of membrane as totraumärmstes operating principle. Diaphragm valves with certain physical materials and qualities are thus often found in the Appendices of pharmaceuticals and biotechnology, since any cross-contamination should be avoided.

However, other processes are preferably implemented with diaphragm valves. As used in paint shops or plants for the production of printer cartridges different colors, for example, must be ensured here that the next color does not mix with the previous one. This can be achieved with high adhesive fluids of this type best with aseptic valves.

Apart from the aspect Totraumärme diaphragm valves have also optimized draining constructed and installed to allow the residue-free removal of the medium. For the optimal discharge, there are various opinions with regard to the values ​​appropriate angle for installation in the pipe.

Diaphragm valves ridged

The membrane seals the valve on top of the sealing bar. The diaphragm is moved by means of this pressure piece only over a relatively small distance. The sealing bar is opposite to the membrane. To fully open the valve, the diaphragm needs to be little deformed. The operating medium touches only the membrane surface, all mechanical parts are outside the medienbenetzten space. These models come in plastic and metal. The flow direction is arbitrary.

Applications: use in high purity (HP and sterile application) to heavily polluted liquid, gaseous and neutral and aggressive media. The limits are in accordance with the execution at 10 bar operating pressure and 150 ° C operating temperature, the flow characteristic is favorable.

Features and Benefits: All mechanical components are outside the medienbenetzten area. The operating fluid contacts only the inner surface of the valve body and the surface of Absperrmembrane. The valve is suitable with a pneumatic actuator for increased switching exchange. By suitable mounting angle the underlying pipe sections can be emptied as far as possible when the valve is open.

Examples of areas: pharmaceuticals, hygiene and sterile technique, semiconductor and microchip manufacturing, all sectors of water treatment such as sewage, waste water, seawater, cooling water and utility as pure and pharmaceutical water, slurries, powders and dusts, cellulose and paper production / processing, paint and varnish manufacturing / processing, mining and mining technology, gemstone, metal and mineral extraction / processing, fertilizer manufacturing, plaster, cement, sulfur and limestone quarries, Sole technology, Wastewater Treatment, pellet production, machine and plant construction, automation, food and beverage containers.

Diaphragm valves in deep seat design

However, these valves do not have a sealing land, so that they are not here to diaphragm valves for the purposes of standardization. However, they are still often used because of their robustness. Examples of areas: Heavily polluted wastewater, pulp and paper manufacturing / processing, mining and mining technology, gemstone, metal and mineral extraction / processing, fertilizer manufacturing, plaster, cement, sulfur and limestone quarries / processing, Wastewater Treatment and pellet production.

Standardize

Almost all European manufacturers and distributors of valves shall be related to or meet with their web seat diaphragm valves, the applicable standards. For diaphragm valves made of metal, this is for example the DIN EN 13397th