A Look into the Pressure Control Valve Called Pressure-Relief Valve
The pressure control valve is the reason hydraulic systems work properly. Without it, systems would fail. They would not be able to maintain system pressures safely and under the desired maximum level. They wouldn’t even be able to keep a fixed pressure in part of a circuit.
This valve comes in different types, as it possesses a wide range of functions in many industries that rely on hydraulic and pneumatic equipment. The purpose of the valve is normally the basis for its name. In this article, we get to talk about one specific kind.
Pressure-relief valves
The primary function of pressure-relief valves is to control a hydraulic circuit’s maximum pressure by giving another path for the fluid to flow as the pressure reaches its peak level. All fixed-volume pump circuits need relief valves to prevent extreme pressure in the system. These pumps must move fluid as they turn, so when actuators are running, or a pump unloads via an open-centre circuit, the movement of fluid should then go off without a hitch. Relief valves are likewise crucial as the actuators stall with the directional valve in a shifted position.
There are two classifications of a pressure-relief valve: the compound or pilot-operated pressure valve and the simple or direct-acting pressure valve.
Pilot-operated valve
The pilot-operated or compound pressure relief valve comes with a main relief valve and a small pilot relief valve. It functions in two stages. First, the pilot relief valve opens when it reaches a pre-set maximum level of pressure. Secondly, as this happens, the main relief valve also opens.
Simple Pressure-Relief Valve
The direct-acting pressure control valve is the most commonly used kind of pressure control valve, as it operates most – if not, all – hydraulic systems. Usually, it’s a closed valve that works by limiting the pressure to a certain maximum level through diverting the pump flow back to the tank. There is a poppet seated inside the valve, attached by a heavy spring. As the pressure in the system goes high enough, the poppet is then forced off the seat, allowing flow through the outlet to the tank, provided that the high levels of pressure are maintained.
The pressure control valve is indeed a beneficial and significant tool for controlling pressure, temperature, flow, and liquid levels in hydraulic systems. Should you need any of the above-mentioned valves for your system, or other types of pressure control valves, visit Mastermac 2000 today!
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LEADING THE INDUSTRY: Established in 1989, MasterMac2000 has grown to become one of Australia's largest privately owned pneumatic and process automation companies. We stock top-quality brands like Univer, Mack, Tolomatic, Mac, Piab, American, and Rotoflux in Brisbane.
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About The Author
Stuart Havill
Stuart Havill is the owner and manager of MasterMac2000, Queensland's largest privately owned pneumatic and process valve company.
With his early working career as a maintenance fitter for Boral in 1992, Stuart has spent his life in the field of pneumatics and process equipment. He gained extensive experience in plant design, maintenance, repairs, fabrication, and site management.
In 1996, he transitioned to a pneumatic sales technician role at MasterMac2000, where he excelled in key account management, providing cost-effective solutions, and managing a sales team of 9 employees.
Since 2002, Stuart has been the manager at MasterMac2000, overseeing the company's growth and establishing it as a leader in pneumatic automation and process valve engineering. His expertise spans customer training, CRM setup, industrial compressor sizing and installation, and turn-key project management.
Under Stuart's leadership, MasterMac2000 has been servicing the industry since 1988, with 5 full-time sales representatives covering northern rivers NSW, Queensland, Northern Territory, and PNG. The company prides itself on providing the best-priced solutions to all customers in the marketplace.
View Stuart’s LinkedIn profile to learn more about his expertise in pneumatics and process equipment.