Product description:
Triple Offset butterfly Valves Material: Body:WCB Disc: CF8+STL, Stem: A182 F6A. Seat: WCB+STL,Sealing ring: CF8+STL Nominal Diameter:18 INCH Nominal Pressure:Class 300 End Connection:flanged
Triple Offset Butterfly Valves 18" Class 300 with Pneumatic actuator
| Name: |
Triple offset flanged butterfly valve 18" class 300 with Pneumatic actuator |
| Material: |
Body: WCB; Disc: CF8, Stem: A182 F6A. Seat: WCB+STL Seal Ring:CF8+STL |
| Nominal Pressure: |
Class 300 |
| Nominal Diameter: |
18" |
| End Connection: |
Flanged |
| Structure: |
Triple Eccentric |
| Operation: |
Pneumatic |
| 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.
DBV butterfly valve material selection is very large,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)
Every valve in DBV with clear typecasting and smooth sealing
to ensure excellent sealing. Clear the valves very carefully in
every details and the valve bore
.
The ASME B16.5 code requires that the flange face
(raised face and flat face) has a specific roughness to
ensure that this surface be compatible with the gasket
and provide a high quality seal
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'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
