What Materials Are Large-diameter Seawater Desalination Butterfly Valves Made Of? What Are The Components Of Butterfly Valves?

The large-diameter seawater desalination butterfly valve is composed of several important parts such as the valve body, valve plate, valve seat, valve shaft, etc. The corresponding material selection of each component is different, and of course the material model is also different. Let's talk about it in detail below.

The composition structure and model material of Lined Butterfly Valve

1. The material of the valve body and valve plate of the seawater desalination butterfly valve

The valve body is a major component of the butterfly valve. There are different mechanical manufacturing methods according to the pressure level. The valve body of medium and low pressure specifications is usually produced by casting. The valve body of medium and high pressure specifications is produced by forging. The valve body material range is very wide, mainly cast iron, carbon steel, stainless steel, etc.

The valve plate is an important component on the butterfly valve to control the flow of pipeline fluid medium. Its materials are mainly ductile iron and stainless steel.

Seawater desalination butterfly valve body and valve plate material models: gray cast iron (HT200, HT250, HT300), ductile iron (QT400, QT450), carbon steel (WC1, WCB), alloy steel (WC6), stainless steel (304, 316, 316L).

2. Material of the valve shaft of the seawater desalination butterfly valve

The valve shaft is also called the valve stem, which is used for transmission. It is connected to the actuator or handle on the top and directly drives the valve plate to rotate below to realize the butterfly valve switch or regulation.

The valve shaft material is generally made of stainless steel and carbon steel, and its model is: stainless steel (2cr13, 304, 316, 316L), carbon steel (35, 45, Q235).

3. Material of the valve seat of the seawater desalination butterfly valve

The valve seat of the butterfly valve can be divided into soft seal and hard seal according to the material, and the material used for each sealing form is also different.

Soft seal butterfly valve sealing surface material and model: nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), polytetrafluoroethylene (PTFE).

Hard seal butterfly valve sealing surface material and model: copper alloy (T), stainless steel (H), hard alloy (Y).