Double Eccentric Flange Butterfly Valve
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  • Product Details

Product Introduction

Double eccentric soft seal  butterfly valve  is a shut-off bicirectional valve with a double offset of the disc. lt has good fluiccontrol characteristics and closing sealing performance, and is widely used in food, medicine, chemical, petroleum.electric power, textile, paper and other industries .


Working Principle

The eccentric principle is that the stem shaft is both deviated from the valve body center (a), also deviated from the seat (b)The double eccentricity effect allows the butterfly plate to  quickly  detach  from  the  valve  seat  when  the  valve   is  openedGreatly  eliminates unnecessary excessive squeezing and scraping between the butterfly plate and the valve seat, reduce:the valve opening torque, reduces valve seat wear, and improves the service life of the valve seat .


Parameters


Soft seal butterfly valve-Sealing ring on the body

On the basis of the disc seal butterfly valve, derived body seal structure butterfly valve - the  sealing  ring  is fixed  on the valve  body. Thestructure  also  has  good fluid  control characteristics and closing sealing performance .

1. The automatic adjusting elastomer seat is fixed to the body

2.100% bidirectional seal zero leakage

3. Adjusting retaining ring is fixed to the valve body flange with A2-70 screws, which do not contact the medium

4. Besides the above features, t also has the features of good sealing and low operating torgue of butterfly valve with disc seal structure


               
               


Features


Features

1 .   100 %  Sealed ,  zero leakage : se lf-adjusting elastomer  seat  is  fixed  to  the  discby  adjusting retainingring

2. Bi-directional flow sealing with 1.1 x PN

3. Disc seat with high qualiy rubber, regains original shape

4. Adjusting retaining ring fastened with A2-70 screws and  extra  dowel  pins5.  Body  seat  with  automatic surfacing robot surfacing stainless steel

6.  Self-lubricating  shaft  sleeve,  reduce  operating torque

7. Easy maintenance and handling

8a . Streamlined  discdesign,  reduces  the  flow resistance coefficient, making thefluid channel more stable ,   reducing  pressure loss and reducing sensitivity folvavitation

8b. Truss type disc design, disc has higher strength, suitable for high pressuregrades and large diameters


Standards


Dimensions




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