Check Valves
What is a Check Valve?
A check valve serves as a crucial backflow prevention device, ensuring fluid flow in a single direction. This mechanism operates by allowing the pressure of forward fluid flow to open the valve disc, while the pressure exerted by backflow closes it firmly against the valve seat. To achieve this essential check function, there are three distinct types of check valves available which we describe below:
Swing Check Valves
In a swing check valve, a hinged disc assembly is suspended from the body, enabling free movement. This configuration minimizes pressure loss and also facilitates smoother fluid flow. Swing check valves can be used for either horizontal or vertical (fluid flowing upward) pipe layouts.
Lift Check Valves
The lift check valve is a globe valve without a stem, handle, or other opening or closing parts. It also includes an additional cover. Because of its large fluid resistance, this valve is used primarily for small-bore applications.
Wafer Check Valves
The wafer Type Swing Check Valve has short face-to-face dimensions and low weight allowing a simple space-saving installation between the companion flanges. The valves are suitable for mounting between weld neck or slip-on plate companion flanges of different standards. The short face-to-face dimensions and the low weight guarantee a simple and space-saving installation between the bolts of the connecting flange.
