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…
Category: Hydraulic Pressure Control
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…
1. A backhoe operator controls the speed of the cylinder, which extends the bucket by cracking open the DCV controlling flow of the cylinder. Describe…
A brake valve performs the same function as a counterbalance valve, but it is designed to overcome a key disadvantage. An example will illustrate this…
The counterbalance valve, also called a holding valve, is used to prevent a weight from falling uncontrollably. As an example, consider a press with a…
The sequence valve and pressure-reducing valve have some similar features. It is instructive to compare their symbols side by side (Fig. 3.20). Both valves are…