They are: meter-in, meter -out, and bleed-off (or bypass). Air and hydraulic systems use meter -in and meter - out circuits , while only hydraulic circuits use bleed-off types. Each control has certain advantages in particular situations. We show you what they mean, the difference between them, situations where they work well, and what can go wrong.
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This lecture presents flow control methods for fluid power systems.
You can use Meter -In and Meter - Out flow controls together in the same circuit.
In the meter - out operation shown in Figure 6. Figure showing below the meter - out flow control circuit , first circuit represent the rest position while pump is in running situation. When DC valve will be operate we can see the second circuit to determine the fluid flow to the cylinder through the check valve. Fluid will flow via check valve by bypassing the . For more information of this and other t. Also called Speed control valve) allows free flow in one direction but restricts flow in the other direction. Meter in circuits , meter out circuits , Bleed off circuits , Sequencing . Fluid in the cap end is at system pressure, and the relief valve dumps excess pump flow to tank. Pressure at the rod end of the cylinder will be at system pressure or higher according to the rod size and force required to move the load.
The check valve allows free reverse flow when the cylinder retracts. Meter - out circuits work well with both hydraulic and pneumatic actuators. Cylinder-mounting attitude is not important because outlet flow is restricted and an actuator cannot run away.
The application of flow control valve ( meter - out circuit ). Objective: To become more knowledgeable with the hydraulic system. A cylinder is speed is determined by its size and the flow . This video explains how the basic meter - out hydraulic circuit works. The Hydraulic Basics course introduces the basic components and functions of hydraulic and pneumatic systems. Topics include standard symbols, pumps, control.
Flow Control Methods and Devices. Preferred method of flow control in pneumatic circuits is the meter - out design. Permission granted to reproduce for educational use only. Transmission by combined open circuit pump and valve control. This week – be sure to read your textbook.
Lab 6: Meter -in and meter - out circuits.
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