Is a hydraulic system in which the input of the system must be set the amount of the fluid flow, so as not to endanger the hydraulic system.
Description of the operating principle meters in
In the circuit in meters, flow control (flow control) to be installed before the fluid entering the cylinder (flow control mounted between the actuator and the hydraulic pump).
So here the fluid will enter the actuator will be reduced, for example fluid out of the pump at 5 gallons per minute, then by the flow control actuator to be supplied to 3 gallons per minute, while the 2 gallons flowed back to the reservoir through a relief valve (see image 3.99).
So that the work pressure that comes from the directional control valve can be set large enough (lowered) through the control valve, and consequently the movement was well controlled actuators.
Series meter advantage in
In this series of cylinder movements can be fine tuned by the flow control valve, besides that it is also the incoming fluid pressure to the actuator is not too large this is due in part to the pressure fluid flows back to the reservoir through a relief valve.
Disadvantages of meters in is that the load can be shifted because there is no barrier to flow to the outside.