Bulk Technik cc
Pinch valves are ideal for isolating the flow of abrasive, corrosive and fibrous products, which can be in the form of a liquid, slurry or a granular powder. A pinch valve can either be closed mechanically or pneumatically, the latter being a far more cost effective option. When fully open, a pinch valve allows free, unhindered passage of the medium flowing through it, thereby producing a minimal pressure drop across the valve and also preventing line blockage or clogging. The pneumatically operated pinch valves have no moving parts so essentially they require no servicing.
The AKO range of pinch valves are fully imported from Germany and have become one of the global leaders in this industry. Their continuing research over the last 25 years has led to many improvements to their pinch valves as well as additions to their ever growing product range.
The wide variety of housings and sleeves offered by AKO, ensure that a suitable pinch valve can be supplied to meet most process requirements. Typically pinch valves are used in pneumatic conveying systems, cement industry, fitted to road tankers, pharmaceutical industry, food and wine industries amongst many more. The maximum operating pressure of the pinch valves is size dependant, but varies from 2 to 6 bar.
The pinch valves are supplied with either a PVC, a cast aluminium or a stainless steel housing, the latter two can be fitted with aluminium, cast steel or stainless steel flanges. The pinch valve sleeves are available in over twelve different material types, these range from anti-abrasive natural rubber, to high temperature rubber, food grade rubber, EPDM, silicone and many more. The sleeves of the pinch valves are mostly suitable for temperatures up to 80 deg C, while some compounds can endure up to 130 deg C. AKO supplies pneumatically closing pinch valves from 10 NB up to 250 NB.
The mechanically operated pinch valves can be operated by hand wheel, pneumatic actuators (double or single acting), hydraulic actuators as well as electrically. Sizes range from 25 NB to 600 NB with maximum operating pressures reaching 40 bar. The pinch valves can be supplied with 10 different types of sleeves while the housings are made from grey cast iron, steel or welded steel (mild or stainless), depending on the model, nominal diameter and the pressure rating.
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