Cylinder in order to control the discharge of fluid flow. They are usually positioned near to air cylinder to control the speed of air cylinder.
Feature as below 1.
Flow control meter in vs meter out. When a load is pulled downward due to gravity a meter-out system is preferred. I was always told to use the meter out on pneumatics because that prevents a jerky motion of the cylinder as the pressure builds up in the flow control valve till it lets the air thru into the cylinder. 1 In the meter in circuit the flow rate goes into the cap end of the cylinder while in the meter out circuit the flow rate comes out of the rod en of the cylinder.
Thus a meter-out flow control system controls the oil flow rate out of the cylinder. Inders we find that it works best to meter in. On nearly all other air cylinder applications the meter out method is used.
Elbow Type Flow Controls Meter-Out – Elbow Type Flow Controls Meter-Out – Provides Metered Flow Control in One Direction – Built-In Check Valve Allo. Air and hydraulic systems use meter-in and meter-out circuits while only hydraulic circuits use bleed-off types. The following measure of pressure is taken at various pressure gauges.
Meter-out flow control circuit will control the flow of fluid leaving the actuator. VTR turbine flow meter For applications in even the most challenging conditions in the oil petrochemical and chemical industries we have developed our turbine flow meters in the VTR series. A meter-in flow control will not work if the actuator has an overrunning load the load pulls on the piston rod.
The difference between the meter in circuit and the meter out circuit are as follows. This means that we control the flow of air into the cylinder as opposed to meter out where we control the flow as air exhausts. The gear flow meters work in accordance with the displacement principle and are suitable for a variety of fluids.
Meter out keeps the load in control from overrunning but the intensification can be serious and must be checked. In the meter-out operation shown in Figure 639 the direction of the flow through the circuit is simply changed as can be made out from the diagram. A meter-out circuit prevents this stick-slip motion stiction.
Meter-in systems are used primarily when the external load opposes the direction of motion of the hydraulic cylinder. 2 The meter in circuit can only be used for positive loads and the meter out circuit can be used for both positive and negative loads. Meter out must account for dynamic stopping conditions and shock or it can produce high rod side pressures.
Meter-in circuits works well with hydraulic fluids but can give erratic action with air. In the meter-out circuit the flow control valve is connected in the secondary line directly after the load. Pressure builds again to overcome static friction and the process repeats.
It is the opposite of a meter-in operation as this change in direction will cause the fluid leaving the actuator to be metered. Mainly installed in the air actuator. Figure 638a shows a meter-in operation in a hydraulic system.
Meter-in meter-out and bleed-off or bypass. METER OUT CIRCUIT Figure shows a schematic drawing of a meter-out flow control circuit that restricts fluid as it leaves an actuator port. Meter-In Circuit Advantages Disadvantages and Applications Pressure Gauge P1.
Each control has certain advantages in particular situations. Pneumatic throttle valve is called speed controller or flow control valve. There are fittings that you can adjust the flow from the PTC side to the threaded side which are typically sold as meter-in and those that can adjust the flow from the threaded side to the PTC side which are typically sold as meter-out.
On RazorGage products we typically. The advantage with the meter-out operation is that unlike in the case of meter-in operation the cylinder here is prevented from overrunning and consequent cavitating. Flow control valve will be installed on discharge end or return side of actuator ie.
A meter-out flow control system is one in which the FCV is placed in the outlet line of the hydraulic cylinder. Meter-out circuits work well with both hydraulic and pneumatic actuators. Put a meter-in on the solenoid and it becomes a meter-out.
This lunging movement can continue to the end of the stroke. It indicates the Pmax as set by the pressure relief valve. There are three types of flow control circuits from which to choose.
Meter-in is a method by which a flow control valve is placed in a hydraulic circuit in such a manner that there is a restriction in the amount of fluid flowing to the actuator. 32 -140F 0-60 The difference between pneumatic meter out. It applies full system pressure to closed side and can produce even higher pressure on the rod seals.