Worm Gear QT450 Flange Triple Eccentric Butterfly Valve - Flanged Butterfly Valves


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Worm Gear QT450 Flange Triple Eccentric Butterfly Valve
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Worm Gear QT450 Flange Triple Eccentric Butterfly Valve

  • Product description:

    DBV, which has two factories in China, can also make QT450 Triple Eccentric Butterfly Valve.

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Ductile Iron QT450 Butterfly Valves

Valve manufacturer description

Triple offset Butterfly Valve (1)


GO DI QT450 Flange Triple Eccentric Butterfly Valve


Body:QT450; Disc: QT450, Stem: SS410. Seat: Overlay 13Cr. 

Nominal Pressure:


Nominal Diameter:


End Connection:



Triple Eccentricity


Worm gear 

Valve type:

Industrial Valve

Working Temp.:


Design Standard:

API 609

Test / Inspection:

API 598/ISO 5208

Face To Face:

API 609

PSWe also can make according to customer's requirements.

details-dbv valve manufacturer


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 discnot only strengthening the disc to be more 

strong, but also making it looks very beautiful.

3g why

  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. 



5g Contact us

 Butterfly Valve Contact  

Company Profile:

DBV VALVE CO., LTD is manufacturer of valves.

                                                                   more detail>

Email: [email protected]  

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


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