check Valve

major types of the check valve

Check valves are available in numerous types, styles and shapes. The variety of the prosperous check valve is making their contributions to the industrial development. The following chart aims to indicate the common six basic types of check valves and several specific ones of each type.

The variety of the check valve generally performs the same basic function. It refers to ensure that the flow goes through one direction and no flow returns. Check valves are commonly installed on the discharge side of the pump. Actually, the check valve is employed to act as the automatic shut off valve when the pump stops to prevent draining of the system which the pump fills. However, each check valve has different shut off characteristics. No single check valve is all serving. For example, the Lift Check Poppet would be excellent for clean fluid, but a poor selection for waste water because of the obstructive flow passages.

applications of the check valve

With the quick development and increasing popularity, the check valve is within a wide of general applications. Generally speaking, it is often used with some types of pumps. And according to the different types, there are some different specified pumps for each specified type. For example, the diaphragm pumps such as metering pumps and pumps for chromatography commonly use inlet and outlet ball check valves.

The check valve has done a lot of benefits for many fluid systems such as those in chemical and power plants, and in many other industrial processes.

Check valves are also often used when multiple gases are mixed into one gas stream. When it is installed on each of the individual gas streams, the check valve is used to prevent mixing of the gases in the original source. For example, if a fuel and an oxidizer are to be mixed, then check valves will normally be used on both the fuel and oxidizer sources to ensure that the original gas cylinders remain pure and therefore nonflammable.

Some types of irrigation sprinklers and drip irrigation emitters have small check valves built into them to keep the lines from draining when the system is shut off. Besides, the check valves used in domestic heating systems to prevent vertical convection, especially in combination with solar thermal installations, also are called gravity brake.