Bidirectional pressure butterfly valve features and processing

The characteristics of the two-way pressure butterfly valve We can quickly understand the advantages of the two-way pressure butterfly valve. 1. Two-way pressure butterfly valve is a two-way pressure-bearing, two-way stainless steel metal hard seal, simple and compact structure, light weight, easy operation, reliable performance, complete functions, elegant appearance, easy maintenance.

2. The butterfly plate of bidirectional pressure butterfly valve adopts a balanced structure. This structure has good rigidity, large flow area, and small flow resistance, so when the valve is fully opened, it is not easy to produce the phenomenon of jitter. When the valve is fully closed, it can effectively prevent the seal ring. Excessive deformation prevents leakage of the valve due to damage to the entire seal ring. 3. The sealing surface of the valve body is sealed with stainless steel. The stainless steel seat material has good scratch resistance, cavitation resistance and hardness stability. 4. The bi-directional butterfly valve butterfly seal ring can be easily installed in the valve body after the butterfly valve is installed. Replace and adjust.

First, in the chemical industry, anti-corrosion valves are commonly used. There are as many as thousands of anti-corrosion valves. Now take the valve seat of the bidirectional butterfly valve as an example, talk about its processing technology.

Second, special tool design

The writer has continuously explored improvements and designed a set of special tools for machining two-way butterfly valve sealing surfaces. Using the principle of leverage, the circular rotating motion is converted into the oscillating motion of the tool, so that the arc spherical surface of the sealing surface is processed. Just adjust the tool size slightly to process different series of sealing surfaces. The requirements for the technical level of workers' operations have also been greatly reduced.

Third, parts analysis

The part is a simple sleeve type part, and the main processing surface has an arc R and a radial hole D. Bi-directional butterfly valve parts require that the inner machining surface is concentric, so the inner arc and inner cone should be processed at the same time under one installation condition. The wall thickness of the parts is small and the material is PTFE, which is easy to deform. Therefore, during the machining process, the direction and point of action of the clamping force should be taken into account.

The bearing of the bidirectional butterfly valve is made of steel back composite material. The inner surface layer of the two-way pressure butterfly valve and the valve shaft is PTFE. This material is equivalent to foreign DU type, and the operating temperature is -200 to 280 °C. The self-lubricating performance is good. long life.

This article comes from: Bi-directional butterfly valve company network / electric control valve