Single eccentric butterfly valve, double eccentric, triple eccentric butterfly valve and the difference between advantages and disadvantages

of commonly used butterfly valve can be divided into the form of the connection flange connection and the connection to the clamp, center vertical plate structure, single eccentric, eccentric double, triple eccentric. Center vertical plate used for sealing butterfly valve, valve is also commonly used. So how much you know about eccentric butterfly valve?

today we will give you a brief introduction order eccentric, double eccentric, triple eccentric butterfly valve and the difference between the advantages and disadvantages:

< br / >

< br / >

< br / >

1, single eccentric butterfly valve is to solve the problem of the squeezing the butterfly valve disc and seat, the valve stem and axis deviation from the center of butterfly plate, so that the butterfly plate up and down side is no longer a rotary axis, scattered, relieve excess extrusion disc side and up and down the seat.

2,, Double eccentric butterfly valve is to belong to elastic hard seal of high performance, further improvement on the basis of single eccentric, characterized in the center of the axis of the stem is deviating from the butterfly plate, also deviates from the center of ontology, the valve is opened, the butterfly plate can quickly out of the seat, greatly eliminates the butterfly plate and valve seat unnecessarily excessive extrusion, scraping phenomenon, reduce the open resistance, reduce wear and improve the life. Some factory sealed double eccentric butterfly valve sealing cavity technology do not reach the designated position, valve plate is easy to pass through.

3, triple eccentric is high temperature resistant hard seal must be used, but there is leakage, with soft seal must be zero leakage, but not high temperature resistant, soft seal in order to overcome this contradiction of the double eccentric butterfly valve, and to the third eccentric butterfly valve is the shape of the seal is not positive cone, but oblique cone valve is shut tight, is a multi-level structure, high voltage, high temperature resistance.

keyword: single eccentric butterfly valves