A pressure switch is an instrument that automatically senses a change in pressure and opens or closes an electrical switching element, when a predetermined pressure…
A hydraulic fuse is analogous to an electric fuse and its application in a hydraulic system is much the same as that of an electric…
Let us consider a hydraulic circuit in which two cylinders are used to execute two separate operations as shown in Figure 6.24. Now, let us…
A sequencing valve again is a normally closed pressure control valve used for ensuring a sequential operation in a hydraulic circuit, based on pressure. In…
Let us consider a hydraulic circuit where one cylinder is required to apply a lesser force than the other as shown in Figure 6.20. Here…
A compound pressure relief valve is one which operates in two stages. They are designed to accommodate higher pressures than direct acting relief valves at…
Although most direction control valves are of spool type design, other types are also used. One such design is the rotary four-way valve, which consists…
In earlier years, hydraulic systems were used as a means for removing the stress from structural members of bridges for effecting repairs and also for…
Servo valve bodies are machined with three common port shapes as shown in Fig. 11.13. The effect of port shape on flow is shown in…
The jet pipe design (Fig. 11.12) is less sensitive to contamination than the flapper nozzle. This design uses fluidics technology. A nozzle, attached to the…