Process Description of Dissolved Air Flotation
May 15,2023Read More
Generally speaking, do not put the weight of the check valve in the piping system, the large check valve should be independently supported so that it is not affected by the pressure generated by the piping system. For the check valve installation, pay attention to the direction of medium flow should be consistent with the direction of the arrow marked on the valve body. The lift-type vertical flap check valve should be installed on the vertical pipeline, and the lift-type horizontal flap should be installed on the horizontal pipeline. Next, We will give you a brief introduction to the installation methods of the check valve.
(1) Pipeline industrial check valves
A valve in which the disc slides along the centerline of the valve body. Pipeline check valve is a new valve. It is small in size, light in weight and good in processing technology. It is one of the development directions of check valve. However, the fluid resistance coefficient is slightly larger than that of the swing check valve.
(2) Lifting industrial check valves
A check valve in which the disc slides along the vertical centerline of the valve body. The lift-type industrial check valve can only be installed on a horizontal pipeline. The disc can be a ball on a high-pressure small-diameter check valve. The shape of the valve body of the lift check valve is the same as that of the globe valve (it can be used in common with the globe valve), so its fluid resistance coefficient is larger. Its structure is similar to the globe valve, and the valve body and disc are the same as the globe valve. The upper part of the valve disc and the lower part of the valve cover are machined with guide sleeves, and the valve disc guide cylinder can be freely raised and lowered in the valve seat guide cylinder. When the medium flows downstream, the valve disc is opened by the thrust of the medium, and when the medium stops flowing, the valve disc relies on its own It falls vertically on the valve seat to prevent the reverse flow of the medium. The direction of the medium inlet and outlet channels of the straight-through lift check valve is perpendicular to the direction of the valve seat channel; the vertical lift check valve has the same direction of the medium inlet and outlet channels as the valve seat channel, and its flow resistance is smaller than that of the straight-through type. As a China check valves exporter, MstnLand provides al kinds of check valves including pipeline, lifting, swing industrial check valves.
(3) Swing industrial check valves
The disc of the swing check valve is in the shape of a disc and rotates around the shaft of the valve seat channel. Because the channel in the valve is streamlined, the flow resistance is smaller than that of the lift check valve. It is suitable for low flow rates and infrequent changes in flow. However, it is not suitable for pulsating flow, and its sealing performance is not as good as that of the lifting type. The swing check valve is divided into three types: single-lobe type, double-lobe type and multi-half type. These three types are mainly divided according to the diameter of the valve.
(4) Compression industrial check valves
This kind of valve is used as boiler feed water and steam shut-off valve, it has the integrated function of lift check valve and globe valve or angle valve.
(5) Disc industrial check valves
A check valve in which the disc rotates around a pin in the seat. The disc check valve has a simple structure, and it can only be installed on the horizontal pipeline, and the sealing performance is poor.
The above are the relevant explanations about the check valve installation methods and precautions of different types of check valves. In addition, there are also some check valves that are not suitable for pump outlet installation, such as bottom valve, spring type, Y type, etc. If you want to know more about the check valve, you can contact us directly!
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