Haolifa Flange Eccentric Butterfly Valve

Double eccentric butterfly valve, also called high performance butterfly valve, is further improved on the basis of single eccentric butterfly valve, its structural characteristics of the butterfly plate rotary axis (i.e., stem axis) and butterfly plate sealing cross-section offset by one size, and with the valve body channel axis offset by one size. Compared with the centerline butterfly valve, the effect of double eccentricity makes the valve open and the butterfly plate can be quickly separated from the valve seat, greatly eliminating the unnecessary excessive squeezing and scraping phenomenon between the butterfly plate and the valve seat, reducing the opening torque, lowering the wear and tear, and improving the life of the valve seat.

Product parameters

• Nominal pressure PN10~16
• Strength test pressure Nominal pressure*1.5MPa
• Seal test pressure Nominal pressure*1.1MPa
• Applicable temperature -10℃-80℃
• Driving mode Electric, pneumatic, turbine, handle

Technical features

1. Simple and compact structure, light weight, 90°rotation, flexible and rapid opening and closing.
2. Eccentric structure is adopted to reduce the friction of sealing ring and prolong the service life of the valve.
3. The sealing structure is reasonably designed to achieve safe sealing, zero leakage, and can adapt to the more severe working conditions.
4. Replacement of valve plate sealing ring, O-ring, valve plate, spindle and other materials, can be applied to a variety of media and different temperatures.
5. The valve body has a foot support, which can realize the vertical or horizontal installation of the valve.
6. Easy to install and dismantle, easy to maintain.