Mixproof shut-off valves type D, B, and R of series VARIVENT® are used for mixproof separation of incompatible media at flow path intersections. In the closed position of the valve (non-actuated position) always two seals are located between the two pipes. If one of the seals fails, leakage may directly drain to the open via the therefore provided leakage outlet of the valve without intermixing with the product being in the second pipe.
In addition the mixproof valves type B and R are equipped with a balancer. The balancer prevents that the valve disk is forced open in case of pressure hammers produced in the pipe system.
Applications
To accommodate the different requirements of various industries, applications and processes, we offer mixproof shut-off valves of various technical configurations in our
portfolio. The selection matrix provides an overview of all the options.
VARIVENT® double-seat valves with spray cleaning of the leakage chamber are frequently used in non-critical areas:
Breweries: Cold process area, e.g. fermenting cellar
Dairies: Before heat treatment, e.g. milk reception, raw milk storage