Wuxi Dongao Nonferrous Casting Co., Ltd.
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Butterfly valve body casting process improvement measures
- Mar 24, 2018 -

Butterfly valve body casting is a kind of valve that adopts a round butterfly plate as a helium opening and closing piece, and at the same time realizes the opening, the closing and the adjustment of the fluid channel along with the rotation of the valve stem. In practical applications, the butterfly plate of the butterfly valve body casting is installed in the diameter direction of the pipe. Generally in the cylindrical passage of the valve body, the disc-shaped butterfly plate rotates around the axis, the rotation angle is between zero and ninety degrees, and when the valve rotates to ninety degrees, the valve is fully opened.


Butterfly valve body castings are mainly used for conveying all kinds of corrosive and non-corrosive fluid media in engineering systems such as various furnaces, gas, natural gas, liquefied petroleum gas, city gas, hot and cold air, chemical smelting, and power generation and environmental protection. On the pipeline, used to regulate and cut off the flow of media.


Butterfly valve body casting process is the focus of the entire production link Russia. It can be said that with a good casting, the proportion of successful valves is greatly improved. Here are some casting process methods commonly used in the casting process design and valve industry:


First of all, in the process of butterfly valve casting process design, one of the basic conditions is to correctly and effectively control the solidification of the casting. In order to realize this requirement, the correct technological measures taken include: pouring system, riser and cold iron, process correction amount, etc., to form a reasonable process plan.


The process measures for the sequential solidification of butterfly valve body castings mainly include: 1. Reasonable design position, pouring position and pouring system; 2. The design of the riser in the final solidification of the butterfly valve body casting, while playing the role of feeding Delay the solidification of the molten steel around the riser, resulting in the conditions of sequential solidification; 3. When the molten steel rises to 1/4 of the riser height during the pouring operation, it is poured from the top of the riser, which can increase the pressure of the molten steel. Raiser temperature can also be increased.