Meter In Vs Meter Out Flow Control

Figures d and e on next page show how flow controls must be installed for.

Meter in vs meter out flow control. 32 140 f 0 60 the difference between pneumatic meter out. To determine how flow controls should be installed first decide if you want to meter out or miter in and then examine the flow control for a diagram that indicates the direction of free flow. Meter in systems are used primarily when the external load opposes the direction of motion of the hydraulic cylinder. Figure b flow diagram figure shows how to read the diagram on the flow control.

They are usually positioned near to air cylinder to control the speed of air cylinder. Meter in control refers to the use of a flow control at the inlet to an actuator for used with actuators against which the load in opposition to the direction of movement. This type of flow control circuit works for any type of load and works best with air operated devices. A meter out flow control system is one in which the fcv is placed in the outlet line of the hydraulic cylinder.

Meter in fittings which you don t want let air slowly into the cylinder the cylinder will be stationary until enough pressure has built up to break any static friction and actually move it at which point it can move very rapidly until the air has expanded and dropped in pressure enough that it stops. Meter out flow control circuit at rest with pump running. It applies full system pressure to closed side and can produce even higher pressure on the rod seals. Pneumatic throttle valve is called speed controller or flow control valve.

Meter out controls restrict fluid leaving the cylinder to retard the cylinder s movement. It shows both the schematic and the real world applica. Meter out must account for dynamic stopping conditions and shock or it can produce high rod side pressures. Figure 10 27 shows a meter out flow control circuit in the at rest condition.

The larger the opening the faster the air can flow out and the faster your cylinder will move. This video is about metering in and metering out a cylinder in either a pneumatic or hydraulic system. Meter out keeps the load in control from overrunning but the intensification can be serious and must be checked. For a meter in circuit that uses a simple adjustable restrictor valve selection of the dcv to create extension of the actuator will.

Thus a meter out flow control system controls the oil flow rate out of the cylinder. If you were to control the flow on the air supply meter in configuration the flow control slows the compressed air. Feature as below 1.