|Theoretical time (in seconds) required to make a inch stroke|
|Valve Series||Cv||Cylinder Bore Sizes (in inches)|
|7/16||9/16||3/4||7/8||1 1/16||1 1/4||1 1/2||2||2.5||3||3 1/4||4|
NA = Not Available. BVS valves with Cv of 0.05 can only operate at or below 30PSI; some other BVS valves are only rated for 90PSI (please double-check the actual ratings if using high inlet pressures)
NS = Not Suitable. Valve/cylinder combinations that result in low theoretical speeds will likely result in jerky or lurching motion.
VF = Very Fast. Predicting theoretical speeds is not practical beyond certain limits (see note below). Other "fast" speeds that ARE shown should be taken with a grain of salt (see note below).
¹ The pressure drop shown is the DROP ACROSS THE VALVE ONLY, see note below. In practice, you can not choose ΔP (pressure drop) - the pressure drop of a given system is dependent on many things.
NOTE: This chart does not take into account tubing diameter or length, number or size of fittings and orifices, size or weight of the load, etc. You may need to factor in these (and other) values to determine the actual duration of a stroke. There are also practical limits to how fast a cylinder can physically operate.