Triple Offset Butt Welded Butterfly Valves DN900 PN25 with Gear box
| Name: |
Triple offset BW butterfly valve DN900 PN25 Gear box operated |
| Material: |
Body: A105; Disc: CF8+STL, Stem:17-4PH. Seat: A105+STL Seal Ring:A105+STL |
| Nominal Pressure: |
PN25 |
| Nominal Diameter: |
DN900 |
| End Connection: |
Butt welded |
| Structure: |
Triple Eccentric |
| Operation: |
Gear box |
| Valve type: |
Metal seated butterfly valve |
| Working Temp.: |
-29℃~+425℃ |
| Test / Inspection: |
API 598 |
| Face To Face: |
API 609 |
PS: We also can do according to customer's requirements.
New design of DBV triple eccentric butterfly valve with large
material selection,high and low temperature and variety of
acid,alkali and other coreosive medium.DBV fully metal seated
butterfly valve can comply with the leakage class A.(Zero Leakage),
we also can produce Bi-direction REAL metal to metal seat butterfly valve
Every valve in DBV with clear typecasting and smooth
sealing to ensure excellent sealing. Clear the valves
surface and valve bore very carefully in every small details.
.
We protect every tiny detail of the seat sealing,very smoothly
to ensure excellent sealing performance.DBV butterfly valve
adopts all metal forged seal ring,overlays stellite alloy on the
sealing surface,its advantages are anti-wear,anti-erosion
and long service life,etc.
The top flange design comply with ISO 5211,The yoke is
convenient for assembling worm gear, pneumatic, electric，
hydraulic and pneumatic & hydraulic actuators.actuators.
Triple Eccentricity Design Features 
The stem is offset on both the X (1)and Y (2) axis of the valve'scenter line. This produces a cam一like motion.
The third offset (3)consists of an inclined conical profile machined into the valvesealing 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 seatand seal ring are fully engaged torque
is applied in order to create a bi一directional, zero leakage, metal-to一metal seal. Forthis reason, triple
offset valves are often defined as "torque" seatedrather than”position” seated as in the case of resilient
or highperformance 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.
