Flange type butterfly valve with multi spline stem design
| Name: |
Flange type butterfly valve with multi spline stem design |
| Material: |
Body:WCB; Disc: CF8, Stem: 17-4PH. Seat:SS304+graphite
|
| Nominal Pressure: |
PN40 |
| Nominal Diameter: |
DN200 |
| End Connection: |
RF |
| Structure: |
Triple Eccentricity |
| Operation: |
Bare Shaft |
| Valve type: |
Industrial Valve |
| Working Temp.: |
-29℃~+425℃ |
| Design Standard: |
API 609 |
| Test / Inspection: |
API 598/ISO 5208
|
| Face To Face: |
API 609 |
PS: We also can do according to customer's requirements.
Typecasting Every valve in DBV with clear typecasting.
Unique stem design The shaft can removable from the disc without any machine
Flange face finishThe 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 gask.
Disc Fixed ringDBV have the best design for the metal to metal renewable seat
butterfly valve with the disc fixed ring,If any problem with the seat,
we don't need change the whole valves,we can only change the seat.
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.
