A valve is a device that is installed to regulate, direct or control the flow of fluids (mainly gases and liquids) through it. This is done by the valve opening, closing or partially obstructing the selected passageways and normally means that the fluid flow will reduce in pressure as it passes through.
Valves are found in virtually every industrial process as well as in many everyday mechanisms, and as such, they can vary largely in their size with some specially made exceeding five metres in diameter. However, typically valves will range from 0.1mm to 60cm in size and control valves traditionally have a pressure range of 3-15psi or the more commonly used electrical signal of 4-20mA in recent years. With valves essential in their use within many different industries and operations, it has led to a diverse range of different types becoming available globally, such as:
Angle seat Valve
Relief or Safety Valves
Multiple Port Valves