Actuators/Valves
Conventions
External force (F):the force applied by a cylinder (like a press) or to a cylinder. It is NOT the weight of the applied mass, it is entered under the Mass (M) parameter (minimum = 0).
Stroke (c):(minimum=1, maximum=6000 mm)
Supply pressure (Pa):the valve input pressure (minimum=1 bar, maximum = 16 bar)
Length of connecting pipes (L):Total length of pipes from valve to cylinder (minimum = 0)
Mass (M):mass to move (minimum=0)
Inclination (α):angle between the horizontal plane and the cylinder axis (minimum -90°, maximum 90°)
Coefficient of friction:coefficient of friction between the mass and any guides or sliding surfaces. A drop-down menu prompts you to select the most commonly used values (minimum=0, maximum=1).
Number of curved fittings:the number of curved fittings between valve and cylinder. This figure is used to calculate any pressure losses at junctions (minimum=0).
Maximum flow rate:the maximum cylinder flow rate. If the flow rate resulting from the calculation exceeds the maximum flow rate allowed, the user is prompted to increase the stroke time (minimum=0 but without useful results; maximum 4 m/s).
Stroke time:the time it takes for the cylinder to complete a stroke (minimum 0.1 sec.)
Presence of a pressure relieving duct:if this option is selected, the algorithm considers that it takes a certain residual pressure at the valve relieving point to push the air into the relieving duct.
Quick-relief valve:if this option is selected, the algorithm considers the fact that the air leaving the cylinder does not require any residual pressure to reach and pass through the valve."
Appl.
descr.
External force
(F)
N
Work stroke
( C)
mm
Supply pressure
(Pa)
bar
Connection pipe length
(L)
mm
Mass
(M)
Kg
Angle
(α)
deg
-
Coefficient of
friction
Number of elbow
fittings
Maximum permissible
speed
m/s
Stroke
time
s