Ductile Iron QT450 Butterfly Valves

PS: We also can make according to customer's requirements.

Yoke Design

DBV butterfly valve adopts the design of top flange yoke as standard ISO5211.  

It is more beautiful, and also convenient to assemble the actuator.

Multilayer-304+graphite Sandwich Design

DBV butterfly valve adopts the design of  multi-layer disc sealing ring, sealing by the inside 

graphite, applied for low and middle pressure, as recycle water,  swagetreatment, city building, etc.

Turtle Back Disc Design

DBV butterfly valve adopts the design of turtle back disc, not only strengthening the disc to be more 

strong, but also making it looks very beautiful.

  Triple Eccentricity Design Features  

 The stem is offset on both the X (1)and Y (2) axis of the valve's

center line. This produces a cam一like motion. The third offset (3)

consists of an inclined conical  profile machined into  the  valve

sealing  surface. This allows rotary engagement and disengagement  

of   the   seat   and   seal   ring without interference.  All  rubbing

between  seat  and seal ring is thereby eliminated. Once the seat

and seal ring are  fully  engaged  torque  is applied in order to 

create a bi一directional, zero leakage,  metal-to一metal seal. For

this reason, triple offset valves are often defined as "torque" seated

rather than”position” seated as in the case of resilient or high performance products.

  Multi-layer disc sealing ring  

 Multi-layer disc sealing ring adopts ss304 and graphite laminated, 

 sealing by the inside graphite, applied for low and middle pressure, 

 as recycle water, swage treatment, city building, etc. DBV multi-layers are all stainless steel 304+graphite or 316+graphite or   better material. 

Company Profile:

DBV VALVE CO., LTD is manufacturer of valves.

                                                                   more detail>

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Wenzhou Factory :No.96 Fanhua East Road,OuBei,WenZhou,Zhejiang,China,325102

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