Types of butterfly valves

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

Up Blow-out Proof Design

Disc fixed on the stem with two pins without Chink to prevent the disc

shaken. DBV butterfly valve adopts such design of stepped shaft with 

the gland. It is effectively that prevent the stem blows out from the top. 

Internal Snap Ring and Bottom Cover Design

DBV butterfly valve adopts the unique stem design. The  bottom  of 

the stem is slotted. The ring  is  embedded to prevent the stem blow 

out. Then, the snap bottom  cover  plays  a  same role. This design

suits for the valve which is larger than four inches.

Standard Bolts & Nuts  

DBV ball valve adopts the standard bolts and nuts. It could extend the

valve longer service life.

    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.

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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