Principles of selecting gate valve, the gate valve should be the first choice when shut-off valves need to be used for pipelines. Normally, globe valves are a little bit expensive than gate valves, but a little cheaper than metal-sealed ball valves, seldom used as shut-off valves for main pipelines.
Control valve requirements: control boiler water intake, ensure steam evaporation, maintain boiler water level, that’s attached boiler feed valve system contains two control valves, one for boiler start-up, one for normal water supply.
Butterfly valves are used in a wide range of applications and are suitable for flow regulation. Because the butterfly valve has a large pressure loss in the pipeline, it is about three times that of the gate valve.
The axial center of the valve stem is simultaneously deviated from the center of the disc and the center of the body, and the rotation axis of the valve seat has a certain angle with the axis of the valve body passage, which is called triple offset butterfly valve.
The superior performance of butterfly valve is closely related to their constant eccentricity, evolution and development. In order to meet various working conditions, the butterfly valve has experienced the evolution from concentric to single eccentricity, double eccentricity and triple eccentricity.
Compared with other valves, the butterfly valve has a simpler structure. It is smaller in size, lighter in weight, and has fewer components. It relies on several key components to form a butterfly valve, but it has achieved better use.
Butterfly valves are used in a wide range of applications and are suitable for flow regulation. Because the butterfly valve has a large pressure loss in the pipeline, it is about three times that of the gate valve. Therefore, when selecting a butterfly valve, the influence of the pressure loss of the piping system should be fully considered.
Ball valve, the opening and closing part ball is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. Solenoid valves are electromagnetically controlled industrial equipment.