Installation, Operation and Maintenance Manual
MAN-02-05-62-0742-EN Rev. 0
December 2019
Section 12:
Valve Traveling Time Adjustment
Lack of de-airing can cause indication errors e.g. delays in feedback and furthermore cause
an unsteady operation sequence. In order to prevent these phenomena, first of all a perfect
de-airing must be carried out according to manufacturer and yard recommendations.
To get exact adjustment, the control of valve speed should be carried out by the throttle
valve of actuator. The throttle valve allows regulation of flow in any directions ("A" or "B").
Counter-clockwise makes the speed faster, or vice-versa. Use a 4 mm Allen key.
Figure 15
12.1
Operating Time for Valve Open/Closed
Following table shows the traveling time of opening and closing of hydraulic remote
controlled valve, which has to be kept for protecting the valve from bad effect caused by
quick opening and closing the valve.
Quick closing valve and the valve which is necessary to be quick acting by special
circumstance and rule requirement shall be excluded in these valve open/shut time
instruction. It’s general that remotely operated valves should be operated in settled
ranges of times. But the valve operating time is influenced by, the length of piping, oil
characteristic and actual ambient temperature around sailing area. This concludes that
operating time might vary with different temperature variations.
Throttle valve
38
Valve Time Adjustment
Section 12: Valve Time Adjustment
