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Rocker valve

from Wikipedia, the free encyclopedia

A rocker valve is a valve with two diaphragm surfaces coupled by a rocker switch. These valves, like flipper valves, are therefore pressure-balanced and also reliably hold pressures that are applied in the opposite direction to the direction of flow.

Construction

The two valve seats and the connecting fluid channel lie in one plane. As a result, rocker valves have an extremely small internal volume and almost no dead volume. The geometry of the fluid channels is designed in such a way that no gaps occur and very good flushability is ensured. When switching, a cross flow is created between the two valve seats, which prevents deposits in the valve chamber

For extreme requirements on internal volume and dead space, rocker valves can also be mounted directly on user-specific sub-bases; the valve seats are then incorporated in the sub-bases.

Advantages

A rocker valve

  • is particularly easy to rinse
  • can be flanged directly onto a subplate
  • has a minimum internal volume and lowest dead volumes
  • remains tight even when pressure is applied against the direction of flow (back pressure) and
  • can also be used for highly aggressive media.

Disadvantages

A rocker valve

  • has a low back pressure resistance, it is lower than with the flipper valve (but higher than with a lifting anchor valve).
  • has a pumping effect due to its design; therefore, it is not suitable for precise pumping applications.