Burkert Type 8605 User Manual download pdf (Page 28)

Configuration

Figure 21: dELY (Delay) - Ramp function

9.3.6. Cut (Cut off) - Zero point cut off

In order to guarantee leak-tight closing of the valve, the valve is completely de-energised with input signals below

the set limit (0.1 to 5.0 % of the set standard signal) when the zero point shutdown is active.

In addition to its control function, the valve can also take on the function of a cut-off valve.

Figure 22: Cut (Cut off) - Zero point cut off

• With a set value of 0.0 %, the zero point cut-off is deactivated. Even at an input signal of 0 %, the valve

no longer reliably shuts off the flow.

• The valve flow control restarts with a hysteresis of 0.5 %.

• The reactivation of the current controls starts as soon as the input signal is set to a value 0.5 % above

the defined threshold value; i. e. there is a hysteresis of 0.5 % for the activation and deactivation of the

cut off function

• The range of the input signal lying below the set threshold is no longer available for the current control

and fluidic flow control

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Type 8605

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Burkert Type 8605 User Manual Page 28