The most widely used type of pressure control valve is the pressure-relief valve because it is found in practically every hydraulic system. Schematic diagram of…
Category: Pressure Control Valves
Unloading valves are pressure-control devices that are used to dump excess fluid to the tank at little or no pressure. A common application is in…
A pilot-operated unloading valve has less pressure override than its direct-acting counterpart.So it does not dump part of the flow prematurely. A pilot-operated unloading relief…
A direct-acting unloading valve consists of a spool held in the closed position by a spring. The spool blocks flow from the inlet to the…
The second type of valve is a pressure-reducing valve. This type of valve (which is normally open) is used to maintain reduced pressures in specified…
A pilot-operated pressure-relief valve consists of a small pilot relief valve and main relief valve as shown in Fig. 1.4. It operates in a two-stage…
Pressure-relief valves limit the maximum pressure in a hydraulic circuit by providing an alternate path for fluid flow when the pressure reaches a preset level.…
Pressure switches are used in hydraulic systems to make or break an electrical circuit at a preset hydraulic pressure. A sensing component made of semi-conducting…
These valves are combination valves that have pressure reducing and counterbalancing functions developed for applications such as a hydraulic balance circuit in a vertical machining…
These valves smoothly stop actuators that have a large inertia force. When a directional control valve is closed, a relief valve at the outlet side…