Casting Wafer-type Fluorinated Lined Butterfly Valve
Strictly engineered in compliance with GB/T 12238 and HG/T 3704 lining standards, this casting wafer-type fluorinated lined butterfly valve is a critical control component specifically designed for handling highly corrosive media and ultra-pure process fluids. Both the internal flow path and the disc surfaces are fully encapsulated with high-density, chemically stable Polytetrafluoroethylene (PTFE) or Perfluoroalkoxy (PFA) linings using advanced molding techniques, ensuring complete isolation of the metallic substrate from the media to withstand severe erosion from concentrated acids, alkalis, and oxidizing agents. Its wafer-type configuration achieves an ultra-short face-to-face dimension, significantly reducing the overall footprint and load on precision piping systems. Utilizing a concentric design, the valve achieves robust, bi-directional bubble-tight shut-off via the interference fit between the lined disc and the thickened resilient seat. The stem features an anti-blowout safety design, complemented by a multi-layer self-compensating V-type PTFE packing system that effectively prevents micro-leakage along the stem axis. The integrated ISO 5211 mounting pad facilitates seamless integration with pneumatic or electric actuators, making it a premier solution for fine chemicals, pharmaceutical engineering, semiconductor manufacturing, and acid regeneration systems where exceptional chemical inertness and corrosion-resistant service life are paramount.
| Description | Value | Unit |
| Nominal Pressure (PN) | 16 | – |
| DN | 50–400 | mm |
| Test Pressure: Shell Test Pressure | 2.4 | MPa |
| Test Pressure: Seal Test Pressure | 1.76 | MPa |
| Test Pressure: Air Test Pressure | 0.6 | MPa |
| Suitable Temp. | ≤ 120 | ℃ |
| Suitable Medium | Water, Steam, Oil (W.A.O) | – |
Structural Characteristics of
The entire internal cavity and disc surface are molded with high-performance fluoroplastics, isolating all metallic components from the flowing media. This construction offers absolute immunity to concentrated sulfuric acid, aqua regia, or strong alkalis, ensuring unparalleled stability in chemical pickling and purification processes.
Leveraging the exceptional self-lubricating properties of fluoropolymers, friction between the disc and seat during rotation is minimized. This results in a smooth manual lever operation and significantly reduces wear on the sealing pair, maintaining an extended mechanical lifespan even in high-frequency automated terminals.
The lining serves a dual purpose as both an anti-corrosive layer and a resilient seat, creating a tight seal via disc compression against the fluoropolymer. This resilient seating structure guarantees zero-leakage performance under bi-directional pressure, acting as a critical safety barrier for toxic, hazardous, or high-value fluids.
Fluoroplastics possess extreme chemical inertness and anti-stick properties, making it nearly impossible for media residues to adhere to the internal cavity. This characteristic is ideal for ultrapure water systems or pharmaceutical fluids, preventing microbial growth and sediment buildup to maintain absolute cleanliness within the system’s microenvironment.
The body features a unique multi-standard lug/wafer design, seamlessly matching flange standards including GB, ANSI, DIN, and JIS. This high level of compatibility significantly reduces spare part inventories for overseas engineering projects and provides immense installation flexibility within confined spaces.
Main Components Material
| NO | Part | Materials |
|---|---|---|
| 5 | Bushing | Brass |
| 4 | Disc | QT450-10 |
| 3 | Stem | 2Cr13 |
| 2 | Seat | EPDM |
| 1 | Body | QT450-10 |
Class 150LB Main Connection Dimensions
| DN | L | K | n-φ |
|---|---|---|---|
| 50 | 43 | 125 | 4-φ18 |
| 65 | 46 | 145 | 4-φ18 |
| 80 | 46 | 160 | 4-φ18 |
| 100 | 52 | 180 | 4-φ18 |
| 125 | 56 | 210 | 4-φ18 |
| 150 | 56 | 240 | 4-φ22 |
| 200 | 60 | 295 | 4-φ22 |
| 250 | 68 | 355 | 4-φ26 |
| 300 | 78 | 410 | 4-φ26 |
| 350 | 78 | 470 | 4-φ26 |
| 400 | 102 | 525 | 4-φ30 |
Why Choose YAYE
