Dart control valves for use in mines
February 2002
Analytical Instrumentation & Environmental Monitoring
Mitech designs and manufactures its own dart valves in-house according to the specifications of the client. The plug and seat can be made from various materials but the most popular is polyurethane, which is particularly good on abrasive applications at temperatures up to 60°C. These dart control valves are used mainly on cyclone and flotation cells at gold mines and platinum mines to control the level of solution in the tanks.
Stainless steel mounting bars are used to raise the actuator (double acting or spring return) out of the medium. A major feature of the design is that it is totally self-contained which means that the whole unit can be changed quickly and easily. The plug head is guided between the three mounting bars that eliminate the need for shaft guiding.
Many different actuator options are offered such as hand wheel override or electro-pneumatic or pneumatic positioners. An anti-clogging design plug (profile on back end of plug) for flow over applications can be fitted. Dart valves can be either flow over or flow under depending on the application.
Mitech
011 462 2160
[email protected]
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