Product description:

Triple Offset butterfly Valves Material: Body:A105 Disc: CF8+STL, Stem: A564 17-4PH. Seat: F304+STL, Nominal Diameter:DN800 Nominal Pressure:PN25 End Connection:Butt Welded
 

Renewable seat metal to metal seat triple eccentric butterfly valve

 

Name:	PN25  DN800 Carbon Steel Butterfly Valve Butt welded
Material:	Body:A105; Disc: CF8, Stem: 13Cr. Seat: Overlay STL
Nominal Pressure:	PN25
Nominal Diameter:	DN800
End Connection:	Butt welded
Structure:	Triple Eccentricity
Operation:	Bare shaft/Worm gear/Electric
Valve type:	Industrial Valve
Working Temp.:	-29℃~+425℃
Design Standard:	EN593
Test / Inspection:	EN12266-1
Face To Face:	EN558-1

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

Typecasting                             

Every valve in DBV with clear typecasting.Our big size butterfly valves also can comply with the leakage class A.(Zero Leakage).
 

Seat ring     

seat ring Stainless steel ASTM A351 CF8,We processing them with CNC lathe processing center. 
 

Sealing   

Precise processing on the disc sealing to ensure Zero leakage.

Metal to metal seats     

Metal to metal seats can endure severe flashing, hydraulic shock, abrasive process fluid, and high temperatures up to and exceeding 1,000° F. They are also ideal for high erosion or corrosion applications.

Top flange      

The top flange design comply with ISO 5211,The yoke is convenient for assembling worm gear, pneumatic, electric, hydraulic and pneumatic & hydraulic actuators.

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.