The double eccentric butterfly valve working principle of high performance

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 stem axis deviation butterfly plate already, also deviates from the 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.

the structure principle of

double eccentric butterfly valve of high performance, special floating seat design, according to the direction of the pressure source, automatically adjust the seat, achieve the effect of double valve with pressure, and increase the service life of the valve seat, with air separation market requirement and experiment, the service life can reach more than 500000 times, with special valve shaft dustproof design, prevent the fluid from entering the valve spindle caused by valve shaft jammed, butterfly valve type according to different working condition, can choose stainless steel or other special alloy steel for the use of the owner, PTFE seat provides, RTFE, PEEK, METAL and other materials, suitable for petrochemical, oil refining, air separation, CDA, etc. Most of the different conditions of temperature and pressure.

keyword: double eccentric butterfly valves