Manual emergency gearboxes for pneumatic rotary actuators
You can download the data sheet here.
PROKontrol manual override gear boxes are used with pneumatically actuated PROKOSCH ball valves. The manual override gearbox is fitted between the valve mounting bracket and the actuaor.
The manual override gear box includes a switch to enable the override. In automatic operaion the swich must be set such that the manual override is disabled.
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