I would like to calculate the closing/opening time of a Gate valve using an hydraulic actuator. What are the input parameters required and what is the formula for this calculationWhat do you actually need in closing time? Is closing time critical (either way) in your case?On the emergency closing side you will often require very fast closing, perhaps in two steps, first one step to about 80% very fast, and rest slow to avoid water hammer. In other cases (large valves, long pipelines, high pressure) you will have to go, or wish to go, extreemly slow (three minutes to up to more than twice or triple the time) to avoid water hammer and pressure peaks higher than necessary for a perhaps 'lighter constructed' pipeline (cost reasons).You have to start somewhere, and normally you will start with a given oil pressure from a 'normal' aggregate, select a cylinder diameter area (less the rod area on one side) to give a high enough force (P times A) to be sure to have sufficient force for all situations, especially sticking force when opening the valve after a long closed periode.You know the stroke length (diameter of valve plus something small), and hence the volume.The smallest restrictions (pipeline and/or solenoid valve real diameter or cv, and inlet/outlet openings integrated in the cylinder) for your 'normal' selected components are also known.

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