In industry, valves are a key component in controlling the flow of fluids. In order to ensure that your production process is smooth and uninterrupted, it is vital that you choose the right valve. This article will introduce you to how to choose the right type of valve according to different needs.
First, according to the media parameters adjustment selection valve
In the production process, in order to accurately control the media pressure, flow and other parameters, you need to install regulating agencies. These institutions mainly by changing the valve valve and the valve seat between the flow area to achieve regulation. These valves are collectively referred to as control valves.
Self-driven control valves: rely on the power of the medium itself to drive, such as pressure reducing valves and pressure regulating valves. They can be automatically adjusted according to the medium’s pressure changes.
He-driven control valves: driven by external power (such as electricity, compressed air or hydraulic power), such as electric control valves, pneumatic control valves and hydraulic control valves. These valves can be precisely controlled according to preset parameters.
Second, to prevent the media backflow selection valve
Some valves only allow the medium to flow in one direction, and prevent reverse flow. These valves usually work automatically, without human intervention.
check valve: is a representative of this type of valve. It includes swing check valve and lift check valve. Spin check valve valve flap like a door to lean freely on the surface of the inclined valve seat, when the media flow, the valve flap open; media flow in the opposite direction, the valve flap automatically closed. Lift check valve valve is located in the valve body on the seat sealing surface, when the media flow, the valve is lifted; media reverse flow, the valve falls back to the seat, cut off the flow.
Third, according to the nature of the medium through the valve selection
gate valve: mainly used to cut off the flow of media. When the gate valve is fully open, the media running pressure loss is minimized. It applies to the need for frequent opening and closing, and keep the gate fully open or fully closed conditions. Gate valve sealing element in various forms, such as wedge, parallel, etc..
Globe valve: its stem axis is perpendicular to the valve seat sealing surface. Globe valve flap opening or closing stroke is relatively short, with a very reliable cut-off action. It is suitable for use as medium cut off, regulation and throttling. Globe valve flow resistance is high, but the sealing surface mechanical wear is small, easy to repair or replace the sealing element.
Angle globe valve: the fluid only needs to change direction once, so the pressure loss through this valve is small.
Direct-flow globe valve: the flow path and the main flow path into a diagonal, the degree of destruction of the flow state is smaller, the pressure loss is correspondingly reduced.
Plunger type globe valve: based on the plunger principle design, mainly used for opening or closing, but can also be used to regulate the flow.
Butterfly valve: the butterfly valve’s butterfly plate is installed in the diameter direction of the pipeline, and the flow of the medium is controlled by rotating the butterfly plate. Butterfly valve has simple structure, small size, light weight and easy operation. It has good fluid control characteristics, when the butterfly valve is fully open, the pressure drop through the valve is very small. Butterfly valve has two forms of elastic seal and metal seal, which is suitable for large diameter valves and harsh working conditions.
Butterfly valve: the valve is connected between two pipe flanges with double-headed bolts.
Flanged butterfly valve: the valve with flange, with bolts on the valve on both ends of the flange connected to the pipeline flange.
Ball valve: evolved from the plug valve, by rotating 90 degrees to control the flow of media. Ball valves are compact, easy to operate and maintain, and are suitable for a variety of working media. It can be used either as an opening and closing or designed as a throttling and flow control valve.
By understanding these different types of valves and their application scenarios, you can find the most appropriate valve solution for your industrial needs. Whether it is controlling the parameters of the medium, preventing backflow or selecting a valve according to the on-off nature of the medium, there is a valve type to meet your needs.
Valve Selection Guide: Finding the Perfect Match for Your Industrial Needs
