They are used to limit travel in the up down or up and down.
Control valve travel stop.
If the actuator is equipped with an.
In fact these travels stops are used to limit the stem travel at certain travel whether limited to travel in the up direction or down direction.
A travel stop in control valve is used as a mechanical limiter for stem travel.
The stem adaptor should not bind during operation.
It might be possible to assemble the valve in such a way that the mechanism at full travel never quite closes the valve avoiding the need for an add on mechanical stop.
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Adjust the travel stop bolts of the actuator for the proper open and closed valve positions per valve manufacturer s recommendations.
This restriction usually comes because of the capacity limitation in the downstream of the control valve.
Pneumatically stroke the actuator several times to assure proper operation.
Bolt the actuator to the bracket.
The handwheel is furnished with a spring loaded ball detent which prevents vibration from changing the setting.
In any other position valve travel will be restricted.
A travel stop in the control valve is used as a mechanical limiter for stem travel.
It might be possible to configure the control system in such a way that there is always a signal to the valve that is different to that required to provide the shut position.
In fact these travel stops are used to limit the stem travel at certain travel whether limited to travel in the up direction or down direction.