3“ 150LB PFA Fully Internal Lined Butterfly Valves
Description
Technical Data Sheet: 3″ 150LB PFA Fully Internal Lined Butterfly Valve
1. Product Description
This 3-inch, Class 150 flanged (Wafer/Lug) butterfly valve features a body and disc fully encapsulated with PFA (Perfluoroalkoxy) lining. It is specifically designed for highly corrosive chemicals, high-purity media, and severe service conditions, ensuring absolute isolation of the metal components from the process fluid and achieving bi-directional zero leakage.
2. Technical Specifications
| Parameter | Specification |
|---|---|
| Nominal Size | 3″ (DN80) |
| Pressure Class | Class 150LB (PN10/PN16) |
| Valve Type | Concentric / Resilient Seated Butterfly Valve |
| Structure | Fully Internal Lined |
| Connection Type | Wafer or Lug |
| Design Standard | API 609, MSS SP-67, ISO 5752 |
| Face-to-Face | API 609 Table 2 / ISO 5752 Series 20 |
| Flange Standard | ASME B16.5 Class 150 |
| Testing Standard | API 598 / ISO 5208 Rate A |
| Operation | Lever / Gearbox / Pneumatic / Electric |
3. Materials of Construction
| Component | Material |
|---|---|
| Body | Ductile Iron (DI) / Carbon Steel (WCB) / Stainless Steel (CF8/CF8M) |
| Body Lining | PFA (Molded, 3mm min. thickness) |
| Disc | Stainless Steel (SS304/SS316) + PFA Encapsulated |
| Stem | Stainless Steel (SS304/SS316/17-4PH), Blow-out Proof Design |
| Seat | Integrated PFA Lining (Molded together with body lining) |
| Bearing/Bushing | PTFE Composite (Self-lubricating) |
| Sealing Elements | FPM (Viton) / EPDM / PTFE Encapsulated |
4. Performance Data
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Operating Temperature: -29°C to +180°C (-20°F to +356°F)
-
Leakage Class: Bi-directional Zero Leakage (ISO 5208 Rate A / ANSI FCI 70-2 Class VI)
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Suitable Media: Strong acids (Sulfuric, Hydrochloric, Hydrofluoric), strong alkalis, organic solvents, high-purity water, wet chlorine gas, etc.
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Vacuum Service: Applicable, full vacuum rated within -10°C to +160°C (+14°F to +320°F)
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Lining Integrity Test: 100% High Voltage Spark Test (15kV or 10kV DC) performed on every valve to ensure zero pinhole defects.
5. Pressure-Temperature Ratings
(Based on Class 150LB and PFA mechanical properties, typical values)
| Working Temperature | Maximum Allowable Working Pressure |
|---|---|
| -29°C ~ +50°C (-20°F ~ +122°F) | 16.0 bar (232 psi) |
| +100°C (212°F) | 14.0 bar (203 psi) |
| +150°C (302°F) | 11.0 bar (159 psi) |
| +180°C (356°F) | 8.5 bar (123 psi) |
*Note: Final pressure-temperature ratings must comply with ASME B16.34 and the lining manufacturer’s specific data.*
6. Key Features
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Full Isolation: The body and disc are completely encapsulated with PFA, eliminating any contact between the metal and the media. Provides superior anti-corrosion performance.
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Low Torque Operation: The extremely low friction coefficient of the PFA surface, combined with PTFE bearings, results in low operating torque and prevents sticking.
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Bi-directional Sealing: The spherically machined disc matched with the integrated PFA seat ensures bubble-tight sealing in both directions.
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Blow-out Proof Stem: Features an integral safety step design, preventing the stem from being ejected under high pressure or differential pressure.
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Standardized Mounting: The top flange adheres to ISO 5211 standards, allowing direct mounting of various actuators without the need for complex brackets.
7. Precautions & Notes
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Slurry/Media: Avoid media containing hard solid particles, as this may scratch or damage the PFA lining surface.
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Installation: Flange bolts must be tightened evenly and symmetrically. The Lug-style design allows for downstream pipe disconnection while the upstream side remains pressurized.
-
Storage: Valves should be stored in a dry, ventilated indoor environment, slightly open, protected from direct sunlight and any physical impact that could damage the lining.
This technical data sheet is based on general industry standards and typical product specifications. Exact dimensions and confirmed performance parameters shall be subject to the final vendor-certified drawing.
