Cylinder movement a make-up volume of liquid issue.

For a perceptible movement, a make-up volume of liquid (see below in blue) should be the volume of steel cylinder round which took off to be replaced in the atmosphere. Remember that the cylinder ports are closed by ball valves. This is the same as if a directional control valve’s’ A ‘and’ ports working “B” are closed.

A seal damaged or missing piston alone can not be held responsible for the creeping stem of the cylinder, the seal gland end of the rod must also be damaged and leakage at the same time.

If the seal gland is damaged, then steals the stem downward by gravity and a heavy load, can make up fluid to start the vacuum that rod out of the cylinder, and moves in the free atmosphere. The presence of this liquid makeup can explore. Without it, the solution would be to create a team of space they would keep in place.

In this case, the makeup air is. The air is indeed a very useful liquid (no liquid) for use in bottles, especially if you do not mind vague, non-positive movement, and you do not operate at high pressures.

If the pole is pointing up or down, we learned that the lack of piston seal will not let blocked on a single rod cylinder with cylinder fluid drive or ports when the seal gland is rampant compromised.

If you know that your bottle is, in fact, if the ports seem to slip around the directional valve, and yet the end of the rod gland seal leakage is not allowed, where are the real cause?

The check valve of the management itself is often the cause. It can not be closed, the “A” and “B” cylinder ports operate completely. The valve may be worn or it is not because of his return to the position half-closed. The cause of valve problems will be covered in future newsletters.