Flanged Pneumatic Ptfe Lined Butterfly Valve
- Place of Origin:
- Wenzhou,China
- Packing:
- Suitable Packing for Sea/Air Transport
- Connection:
- Flange
- Pressure:
- PN10,PN16,150LBS
- Temperature:
- PTFE:-29℃ ~180℃, PFA:-29℃~200℃, FEP:-29℃~150℃
- Gasket:
- PTFE, PFA, FEP,etc;
A lined butterfly valve seals aggressive process lines through an encapsulated disc closing against an internal fluorocarbon boundary. This mechanical arrangement contains hazardous chemicals inside pipeline perimeters, achieving bidirectional zero-leakage shutoff verified through API 598 hydrostatic testing protocols without fluid migration across automated drive shaft journals.
Flanged Body Integrity and Mechanical Stress Isolation
Continuous chemical distribution systems generate severe axial pulling forces caused through thermal cycles. Installing a flanged ptfe lined butterfly valve isolates internal seating geometries from severe pipeline bending moments through integral cast flanges conforming to ASME B16.10 dimensions.
Independent flange bolting distributes mechanical clamping loads evenly across raised sealing faces, avoiding localized liner distortion.
This rigid construction permits safe dead-end service during downstream equipment maintenance, holding full line pressure while maintenance crews detach adjoining pipe spools without encountering media discharge risks.
| Operating Environment Factor | Standard Metal Body Response | Fluorocarbon Casing Protection |
|---|---|---|
| Subterranean Groundwater Exposure | Exterior casing rust and bolt seizure | Continuous molded boundary protecting core metals |
| Concentrated Sulfuric Acid | Rapid metal loss along internal bores | Chemically inert polymer stopping acid penetration |
| Dynamic Pipeline Vibration | Joint loosening causing gasket leaks | Integrated molded face acting as direct face seal |
| Thermal Expansion Bending | Bore distortion causing seat pinching | Flanged cast envelope absorbing bending loads |
Pneumatic Actuator Sizing and Resilient Interference Fit
Tight contact between spherical disc perimeters and resilient polymer liners produces elevated static friction during breakaway cycles. Process networks deploy a high-performance ptfe butterfly valve featuring direct ISO 5211 mounting pads to transfer rotational drive without side-loading the primary shaft seals.
Pneumatic rack-and-pinion actuators sized with minimum 30 percent torque safety margins overcome static resistance smoothly.
Elastomeric cushion inserts recessed inside cast ductile iron bodies supply continuous inward restitution, counteracting polymer creep across thousands of automated quarter-turn strokes.
High-Cycle Durability and Atmospheric Emission Suppression
Continuous process automation subjects internal sealing boundaries to repetitive hydrodynamic shear forces. Facilities install resilient ptfe butterfly valves featuring live-loaded Belleville washer sets to maintain continuous downward compression over upper packing arrangements.
This dynamic loading arrests fugitive atmospheric emissions during rapid automated cycling.
Thick molded polymer covers extend outward over raised flange faces, creating integral fluid barriers that seal directly against mating pipe faces without requiring separate elastomeric gaskets.
Get A Quote
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
