Views: 0 Author: Site Editor Publish Time: 05-11-2026 Origin: Site
Tianjin Worlds Valve Co., Ltd. offers a concentric wafer butterfly valve designed for reliable on/off control and basic throttling in chemical, water treatment, and industrial applications requiring good corrosion resistance and a wide temperature range. This valve features a ductile iron body, a CF8 (AISI 304) stainless steel disc, and a PTFE (polytetrafluoroethylene) seat. The concentric (center-line) design - where the stem passes through the center of the disc and the seat is symmetrically positioned–ensures low operating torque, bubble-tight shut-off, and easy installation with standard pipeline flanges.
Product Name: Wafer Butterfly Valve
Body Material: GGG50 Ductile Iron with Epoxy Coating
Disc Material: Stainless Steel (304SS)
Seat Material: EPDM, NBR, VITON, PTFE...
Connection Type: Wafer type connection
Size Range: DN50–DN600
Pressure Rating:
PN10 / PN16 / PN25 / Class150 ...
Top Flange: Available in ISO 5211 standard for direct actuator mounting
Operating Temperature Range: -35°C to 200°C (eg: PTFE)
Operation: Manual Lever or Worm Gear (as specified)
Customization: All materials, dimensions, and pressure ratings can be modified according to customer requirements
Type: CBF01-TA01--Product Catalog
1. Concentric (Center‑Line) Design – Symmetrical Sealing & Low Torque
The stem passes through the center of the disc and seat, offering balanced performance.
Low Operating Torque: The symmetric geometry reduces friction between disc and seat, making manual or actuated operation easier.
Bubble-Tight Shut-Off: The concentric arrangement ensures even compression of the PTFE seat around the entire disc perimeter.
Bi-Directional Flow: The design allows sealing in both flow directions, simplifying installation.
2. PTFE Seat – Superior Chemical Resistance & Wide Temperature Range
The PTFE seat is the key feature for handling aggressive media.
Chemically Inert: PTFE resists nearly all acids, bases, solvents, and oxidizing agents – ideal for chemical and pharmaceutical processes.
Low Friction & Non-Stick: Reduces torque requirements and prevents media buildup or fouling.
Wide Temperature Range: Suitable for continuous operation from -35°C to +200°C (depending on pressure).
3. Ductile Iron Body with Epoxy Coating – Strength & Corrosion Protection
The valve body is built for durability in industrial environments.
High Mechanical Strength: GGG40 ductile iron provides tensile strength >400 MPa and excellent impact resistance.
External Epoxy Coating: Minimum 250µm thickness (any RAL color available) protects against atmospheric and soil corrosion.
Long Service Life: Resists pressure surges, water hammer, and pipeline stress without cracking.
4. CF8 Stainless Steel Disc – Good Corrosion Resistance for General Service
The disc material is selected for balanced performance and cost.
CF8 (AISI 304): Offers good resistance to oxidation, water, mild chemicals, and many food-contact applications.
Good Mechanical Properties: Tensile strength of 485 MPa ensures reliable operation under normal conditions.
Upgrade Options: For seawater or high‑chloride environments, CF8M (316), duplex, or aluminum bronze discs are available.
5. Compact Wafer Design – Fast, Space-Saving Installation
The wafer-style body simplifies pipeline integration.
Lightweight & Compact: No companion flanges needed – reduces total installed weight and space.
Quick Bolt-Up: Align between standard flanges and secure with through-bolts.
Standardized Dimensions: Face-to-face per ISO 5752 / EN 558 Series 20 ensures interchangeability.
6. Fully Customizable – Tailored to Your Media
We manufacture strictly to customer specifications.
Disc Material Options: CF8, CF8M, duplex 2205, super duplex 2507, aluminum bronze, or coated ductile iron.
Seat Material Options: PTFE (standard), EPDM, NBR, Viton.
Other Customizations: Pressure rating (PN10/16, Class 150), flange standard (EN, ANSI, AS2129, JIS), epoxy color (any RAL), ISO 5211 top flange for actuator mounting, manual lever or gear operator.
1. We manufacture strictly according to customer specifications – no default assumptions.
2. Our concentric PTFE-seated butterfly valves are proven in chemical, pharmaceutical, and water treatment applications.
3. Full documentation – material certificates, pressure test reports – provided with every order.
4. ISO 9001-certified facility with CE, UKCA, WRAS, and ACS certifications available.
We invite you to contact us for a competitive quotation or to arrange a visit to our factory. Our technical team is ready to discuss your media, temperature, and pressure requirements to recommend the optimal disc and seat materials.
Contact Us:
dekai@worldsvalve.com
