Types of check valves and their application areas in detail

check valveIn the industrial and civil fluid system plays a vital role, its variety, the scope of application is also different.

In terms of structure type, common check valves are divided into two categories: swing-open and lift-open.Swing Check ValveAlso subdivided into single-valve, double-valve and multi-valve rotary type. Among them, the single-valve swing type structure is relatively simple, suitable for small and medium diameter pipelines and low-flow rate fluid system, such as common water supply and drainage pipelines, can effectively prevent water hammer phenomenon on the equipment damage. While the double and multi-valve swing check valve can cope with greater flow and pressure changes, usually used in large flow of industrial pipelines, such as chemical production in the liquid transportation pipeline.

Lift Check ValveThen it is divided into two types: vertical and horizontal. Vertical lift check valve is suitable for vertical pipeline, especially in the hot water supply and other media from the bottom to the top of the flow of the system, such as thermal system, can effectively prevent the backflow of hot water. Horizontal lift check valve is suitable for horizontal pipeline, commonly used in large oil and gas pipeline branch connections to ensure the normal flow of media in the main pipeline.

In terms of material, there are different types of check valves such as cast iron, cast steel and stainless steel.Cast iron check valveLower cost, usually used in building water supply and drainage systems that do not require high corrosion. Cast steel andStainless Steel Check ValveIt can withstand higher pressure and temperature, and has excellent corrosion resistance, so in the chemical industry, electric power and other industries, the nature of the medium requires strict occasions widely used.

Despite the variety of check valves, their core function has always been to prevent the backflow of fluids and ensure stable system operation. Different types of check valves are designed to better adapt to a variety of complex working conditions and media environment.