This valve serves to control / controlling the size of the hydraulic fluid flow .It is assumed that the magnitude of the flow is the amount of hydraulic fluid flowing volume will affect the speed of movement of the actuator. Various flow control:
a. Fix flow control passageways size of the hole is fixed (not adjustable)
b. Adjustable flow control passageways that hole can be set with the adjusting screw.
c. Adjustable flow control with by-pass check valve.
The basic construction of the flow control there are two kinds:
- Restrictor (Figure 23a).
- Orifice (Figure 23b)
Figure 24. Flow control in one direction, namely from the direction A to B is set and from direction B to A full fluid flow
Figure 25. Flow control in both directions and can be tuned
Table ristrictor various forms and characteristics.
Valve One Way
This valve serves to regulate fluid flow only in one direction only, namely when the fluid has passed through the valve so the fluid can not be reversed. Various valves unidirectional:
Figure 21a. Lockable non-return valve
Figure 21b. Lockable double non-return valve
Figure 22. The conical unidirectional valve (check valve)
Hydraulic fluid pressure will lift the poppet p1 Kones so that fluid can flow. So that pressure can lift poppet p1 then p1> p2 + pF