The pneumatic butterfly valve is a small component installed in the pipeline to control the flow of the medium. Its structure is very simple. The components constituting the pneumatic butterfly valve mainly include four types of butterfly valve body, valve plate, valve stem, and valve seat, plus one The driving device constitutes a complete butterfly valve. This article will introduce you to the materials and applicable media that make up the various components of the pneumatic butterfly valve.
1. Main body of pneumatic butterfly valve
The butterfly valve body is one of the main components of the pneumatic butterfly valve. Its main materials are gray iron, ductile iron, cast steel, stainless steel, etc. According to different working conditions and pressure levels, different materials and processing methods are used. When the general pressure level is medium and low pressure, the valve body adopts process selection casting. When the pressure level is medium and high pressure, use the valve body process to select forging.
2. Pneumatic butterfly valve valve plate
The valve plate of the pneumatic butterfly valve is also called the butterfly plate. The pneumatic butterfly valve controls the flow of the medium in the pipeline through the movement of the valve plate. Commonly used valve disc materials are gray cast iron, ductile iron, carbon steel, and stainless steel.
3. Pneumatic butterfly valve stem
The valve rod is a component that is installed on the valve body and connects the valve plate and the drive device. Under the action of the drive device, it directly drives the valve plate to move, thereby realizing the opening and closing and adjustment of the butterfly valve. Commonly used rod materials are stainless steel, carbon steel, and alloy steel.
Four, pneumatic butterfly valve seat
The valve seat, also known as the valve body sealing surface of the pneumatic butterfly valve, is the sealing part of the valve body passage of the butterfly valve. Its material can be divided into soft seal and hard seal. The soft sealing valve seat materials are rubber (natural, NBR, EPDM, silicone rubber, fluorine rubber) and plastic (PTFE, PTFE, PULL, nylon).
