Top 12 Relief Valves

Any condition that causes the pressure in a vessel or device to rise above the defined design pressure or threshold working pressure is referred to as an overpressure occurrence. Pressure relief valves or relief valves are safety equipment that protects a pressurised system from an overpressure event. Their primary goal is to safeguard people and property by discharging fluids from an over-pressurised pipe. This guide will help you make informed choices when buying a relief valve for your equipment.

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Relief Valves Buying Guide

For regulating fluid system variables like temperature, pressure and flow, various electronic, hydraulic and pneumatic systems exist today. For running, these systems need some kind of power sources, like electricity or compressed air. A relief valve must have the capacity to work at all times, particularly during a power outage, when met with inaccessible system controls. The process fluid is the only power source a relief valve uses to function, to put it simply. Thus, the tool may be the sole mechanism left to prevent a hazardous failure if an overpressure event takes place.

Spring-loaded relief valve

The generic spring-loaded relief valve was created to address the need for a simple and dependable tool to protect against overpressure. It involves a valve inlet or a nozzle fixed on the pressurised system. A disc is pressed against it to deter flow under typical operational conditions to keep the disc closed; a spring and a bonnet to accommodate all these elements. The spring load can be adjusted to change the valve's opening pressure. The spring force rises as a relief valve starts to lift. Consequently, if the lift is to proceed, the machine pressure must rise.

Balanced bellows/piston valves

A balanced bellow or balanced piston system is prescribed when overlaid back pressure is variable. These valves are devised with an efficient pressure area equivalent to the disc's seat area. The vented bonnet ensures the pressure region of the piston or bellows is exposed to ambient pressure always and offer a warning indication if the bellows or piston starts leaking. As a result, changes in back pressure would have little effect on set pressure. Backpressure, on the other hand, can impair flow.

Other types of relief valves

A safety relief valve is marked by quick opening or pop action or by proportionately opening to the rise in pressure over the opening pressure, in accordance with the application. It can be used for liquid or compressible fluid. A power-actuated relief valve functions using the primary relieving mechanism, combined with and regulated by a tool that requires a different external energy source. A temperature-actuated relief valve can be operated by internal or external temperature or the pressure from the inlet side.

Categories Simillar to Relief Valves

Categories Simillar to Relief Valves includes Control Valves, Needle Valves and Pressure Regulators