Spool: The internal passageways within a hydraulic valve. The standard spool has two ports that are blocked when the system is in neutral. Stroke: The movement, in either direction, of the piston and rod within a cylinder.
What is a motor spool?
Motor spool is a motor that allows you to control the exact position of the motor shaft and the speed or acceleration.
What is a spool in hydraulics?
A spool valve is part of a hydraulic system that directs the flow of hydraulic fluid. The valve is made up of spools that rotate or slide to block and open channels in a hydraulic system.
What is the difference between a motor spool and cylinder spool?
Cylinder spool: work ports blocked in neutral. Motor spool: work ports connected to tank in neutral. … If you are using the motors for propulsion they need to be blocked in neutral, not connected to the tank.
What is the function of spool valve?
Piston Spool Valves. A spool valve features seals along its surface. By actuating the valve, the spool shifts, causing the seals to travel down the bore and opening the ports to allow for airflow. For systems that have a flow of 100 gpm or less, spool valves are most commonly used to direct flow.
What is a single spool hydraulic valve?
Single spool hydraulic valve is a device used to control hydraulic systems.
What causes hydraulic valves to stick?
When hard or soft particles invade the fine clearance between a hydraulic valve spool and its bore, the force required to move the spool increases. In the worst case scenario, the spool can become stuck. This phenomenon is known as silt lock.
What is spool?
(Entry 1 of 2) 1 : a cylindrical device which has a rim or ridge at each end and an axial hole for a pin or spindle and on which material (such as thread, wire, or tape) is wound. 2 : material or the amount of material wound on a spool. spool.
What is a 2 spool hydraulic valve?
2 spool hydraulic valve is a device used to control hydraulic systems.
What is a quick spool valve?
The Quick Spool Valve has a butterfly valve blocking a scroll of the divided turbo housing, making the turbo act as if it were a smaller turbo. All the exhaust energy is routed through half the turbine housing, causing the turbo to spool at a much more rapid rate.
How do you adjust a hydraulic spool valve?
To adjust the spool valve, loosen the valve-locking nut on the side. Removing the locking nut gives you access to the adjustment screw. Turn the screw clockwise to raise the pressure, and twist it counter-clockwise to lower the pressure.
How does a hydraulic spool valve work?
Essentially a spool valve is a cylinder inside a sealed outer case. … In some cases, there may be a solenoid at each end of the valve, whereas in others there is a spring return so when the solenoid is no longer pushing the actuator, the spring will return the spool to its “normal” or rest position.
How do you identify a hydraulic valve?
The Cross computer stock number is stamped in the shaded area on the handle end of the valve body on recent valves. On older valves, the Z casting number is on the back which would tell you which series, but individual functions would have to be described.
What is a 4 way 2 position valve?
Four-way valves are used to operate double acting air cylinders, control bi-directional air motors and in air circuitry. Also two single acting cylinders can be operated with one 4-way valve. Poppet Valves, 4-Way, 4-Port. The flow paths for an unactuated valve are inlet to cylinder 2 and cylinder 1 to exhaust.
Which valve is also known as memory valve?
Double pilot signal valve or memory valve – Hydraulics & Pneumatics.
How do I know if my hydraulic valve is bad?
Many of the failures in a hydraulic system show similar symptoms: a gradual or sudden loss of high pressure, resulting in loss of power or loss of speed in the cylinders. The cylinder(s) may not move at all, or if they do they may move too slowly or may stall under light loads.