1-The flow limiter
Jet, restrictor, restriction, speed reducer ... are all terms corresponding to the flow limiter.
Do not confuse with the flow regulator which is another hydraulic component.
There are two types of flow restrictors:
- Unidirectional (the flow is reduced only in one direction of passage).
- Bidirectional (the flow is reduced in both directions).
There are several ways to install a flow limiter:
- Serial at the receiver's inlet.
- In series at the exhaust of the receiver (pay attention to the overpressures caused by the differences of sections of the cylinders).
- In parallel, drifting from the oil to the tank.
In all cases, it is found that the flow passing through a simple choke will not be preserved if the loads of the receivers vary.
2- Flow regulator
The flow regulator keeps a constant flow regardless of the load of the receiver.
There are two types of flow regulator:
- 2-way flow regulator.
- 3-way flow regulator.
We can find two symbols:
- The simplified symbol (Fig. 2).