Wafer butterfly valve and eccentric butterfly valve difference

01

Structure characteristics of wafer butterfly valve. The stem shaft center, gate center and body center are in the same position. Simple structure and convenient manufacture. The common lining glue belongs to this class.

The disadvantage is that the gate and seat are always in the extrusion, scraping state, large resistance distance, wear fast. In order to overcome squeezing, scraping and ensure sealing performance, the seat is basically made of rubber and other elastic materials, but the use of sealing materials is limited by temperature, which is why it is considered not resistant to high temperature.

Suitable for petroleum, chemical, food, medicine, paper, water and electricity, ships, water supply, drainage, smelting and energy system pipeline engineering. It can be used in a variety of corrosive, non-corrosive gas, liquid, semi-fluid and solid powder pipes and containers for regulating and intercepting equipment.

02

Double eccentric

On a single basis, double eccentricity is further improved and widely used. The characteristic of its construction is that the stem axis deviates from the ram center as well as the stem axis. The double eccentric effect allows the gate to quickly release from the seat after the valve is opened, greatly reducing unnecessary excessive squeezing and scratching between the gate and the seat, reducing opening resistance, reducing wear, and increasing valve life. The large reduction of scraping, but also allows the double eccentric metal seat can be used, thus improved in the field of high temperature, but the sealing performance is poor.