Relief Valves

Table of Contents

What are Relief Valves?

A relief valve  is a type of safety valve designed to open at a preset pressure, and discharge fluid until pressure drops to acceptable levels [1]. The valve's release of elevated liquid, gas, or steam pressures acts to prevent damage to the system. 

Components of a Relief Valve

Relief valves are comprised of three main elements:

1. Valve element - typically a spring loaded poppet valve. [1]
2. Sensing element - typically a diaphragm or piston. [1]
3. Reference force element.  Most commonly a spring. [1]

Operation of a Relief Valve

Suppliers

• Grainger
• Watts

References