Rocker valve

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A rocker valve is a valve with two membrane surfaces coupled by a rocker switch. These valves, like flipper valves, are therefore pressure-balanced and also keep pressures tight against 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 so that no gaps are created and very good flushability is guaranteed. When switching over, a cross flow is created between the two valve seats, which prevents deposits in the valve chamber.

With extreme demands on internal volume and dead space, rocker valves can also be placed directly on user-specific connection plates; the valve seats are then incorporated into the sub-bases.

advantages

A rocker valve

• is particularly easy to flush
• can be flanged directly to a connection plate
• has a minimal internal volume and the lowest possible dead volume
• remains tight even with pressure against the direction of flow (back pressure) and
• can also be used for highly aggressive media.

disadvantage

A rocker valve

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