Pressure Relief Valves

Pressure Relief Valve

In systems with a sudden increase in pressure, it relieves the high pressure wave in a pressure-sensitive way, ensuring the safe operation of the system. As soon as the pressure rises above the set pressure for some reason, the pressure release valve opens and releases excess pressure. This allows the system to work longer and healthier. It is used at critical points of systems. Pressure relief valves can only be installed. Many sectors prefer safety pressure valves because of their easy use. The pressure relief valve can work smoothly at a temperature of (-200°C) – (+700°C). When pressure is detected above the set value in the system, the relief valve is activated and lowers the pressure. Thus, the pipes, valves, pumps, machines included in the system are not damaged due to pressure. Thus, the system continues to work in a long-lasting and healthy way. If you want your systems to have a long life and high quality, you can contact YENA Engineering. The pressure safety valve is a critical element for installations due to the protection it provides. Pressure relief valves can work with mains pressure without the need for extra energy. It does not require frequent maintenance and is easy to maintain.

What is (PRV) Pressure Relief Valves?

The pressure relief valve is one of the types of safety valves that ensure the proper operation of the installation. If the pressure is not reduced when it exceeds the desired limit, pumps, motors, actuators and other machines located in the area may be damaged. These machines become unusable if they are damaged by high pressure. Since market prices are quite high, losses occur for the company.

The pressure relief valve, on the other hand, prevents all these damages from occurring and allows the company to save significantly. Buying a pressure relief valve to ensure the safety of the installation will be much more affordable than machines that will break down. As the installation works without stopping, repairs and stopping times are also saved. In short, the pressure relief valve ensures a long service life and economical operation.

Application Areas of Pressure Relief Valves

The main field of application of overpressure valve is the points of passage of pumps used for the delivery of wastewater, sludge and other debris. However, pressure relief valves are also often used as flow regulators or relief valves in various installations, tanks and silos.

Types of Pressure Relief Valves

For any reason, when the pressure in the installation rises, the fluid must be drained and the pressure reduced. The pressure relief valve, the mode of operation of which is built on it, is used for safety in many installations. Therefore, there are different types of pressure relief valves. The types of pressure relief valves are as follows:

  • Differential Pressure Relief Valve: When the differential pressure in the system increases, it discharges the fluid and maintains the pressure at the required value. Thus, the system is not adversely affected by pressure changes. Sudden pressure changes are one of the most important problems for processes. Differential pressure relief valves often malfunctions occur in systems that are not used.
  • Threaded Relief Valve: It can be safely used by mounting on pipes suitable for threaded connection. The fact that the drive unit is automatic provides ease of use. There are models of threaded relief valves made of different materials such as peak, ductile iron, steel.
  • Fire Relief Valve: It is used to prevent other equipment, including fire pumps, from being damaged by pressure. The fire relief valve discharges water quickly to reduce the high pressure created in the system. Thus, no disruption will occur due to excessive pressure.

Fire relief valves can be easily injured to the desired pressure value. Thanks to its sensitive mechanisms, pressure change can be easily detected. When the pressure rises above what it should be, it evacuates regularly, leaving no room for problems. Thanks to the flanged and threaded welding connection, it can be easily installed in any fire system.

  • Thermal Relief Valve: As a substance increases in temperature, its size also increases, which leads to an increase in pressure when it contains it. This process, called thermal expansion, can easily destroy equipment based on hot steam or water. To resist thermal expansion, people use thermal safety valves. These valves allow excess pressure to leak out of the system instead of causing an explosion. Since the law requires its use as a basic safety measure, a thermal safety valve is common in many household and commercial appliances.
  • Boiler Pressure Relief Valve: In pressure vessels with a sudden increase in pressure, it allows the system to work safely by relieving a high pressure wave sensitively to pressure. As soon as the pressure rises above the set pressure for some reason, the valve opens and releases excess pressure. Pressure vessels are an important issue, and you can go to YENA Engineering’s publication to get all the information about pressure vessels.
  • Vacuum Relief Valve: In the case of a vacuum formed in the system, it is used to prevent the pipeline from exploding by absorbing large air masses into the pipeline in a short time. Vacuum valves are installed at critical points, especially on the pipeline, and can absorb large amounts of air into the line in emergencies.
  • Hydraulic Pressure Relief Valve: The hydraulic pressure relief valve maintains the pressure in the entire hydraulic system or in the partial system at a certain level of clearance.
  • Oil Pressure Relief Valve: As you know, moving parts are supplied with oil. Gaskets can not withstand their normal performance for a long time. Because of this, the oil begins to leak out and damage the units. Therefore, the oil pump pressure relief valve is designed to reduce the lubrication pressure in the system. The word “reduction” is often used in engineering, it means the reduction, reduction and mitigation of something. In our case, this refers to the oil pressure.
An Example of a Pressure Relief Valve
An Example of a Pressure Relief Valve

Principle of Operation of the Pressure Relief Valve

The working principle of the pressure relief valve is to relieve the high pressure that forces the installation when the pressure rises in the hydraulic line. The pressure relief valve is closed if the pressure in the installation is at the set pressure level. Whenever pressure is detected above the usual setting pressure, the valve starts to open. As soon as the pressure relief valve is opened, there is a rapid discharge of fluid. If the inlet pressure reaches the desired pressure level, the valve closes again. Thus, the installation continues to function without damage from pressure. YENA Engineering will help you to choose the right pressure relief valve for you with its fast and high-quality engineering staff.

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