Aeration Butterfly Valves
| Name: |
Stainless steel Aeration Butterfly Valves |
| Material: |
Body:F304; Disc: F304, Stem: F304. Seat: F304
|
| Nominal Pressure: |
12'' |
| Nominal Diameter: |
150# |
| End Connection: |
RF |
| Structure: |
Triple Eccentricity |
| Operation: |
Pneumatic actuator |
| Valve type: |
Industrial Valve |
| Working Temp.: |
-29℃~+540℃ |
| Design Standard: |
API 609 |
| Test / Inspection: |
API 598/ISO 5208
|
| NACE: |
NACE0175 |
PS: We also can do according to customer's requirements.
Every valve in DBV with clear typecasting. Our big size butterfly valves also can comply with the leakage class A.(Zero Leakage).
Flange face finish 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.
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.
