Views: 0 Author: Site Editor Publish Time: 05-08-2026 Origin: Site
Tianjin Worlds Valve Co., Ltd. offers a two-shaft wafer butterfly valve with a ductile iron body, CF8 stainless steel disc, and EPDM seat, operated by a worm gearbox. The two-shaft design eliminates a long through-shaft, simplifying maintenance and reducing seizure risk. Available from DN50 to DN600 with pressure ratings up to PN10/PN16/Class 150, this valve is ideal for water, HVAC, and general industrial applications. All materials--disc, seat, body, stem--are customizable for more aggressive media.
Product Name: Wafer Butterfly Valve
Body Material: Ductile Iron
Disc Material: Stainless Steel (304SS)
Seat Material: EPDM, NBR, VITON, PTFE...
Connection Type: Wafer type connection
Size Range: DN50–DN600
Pressure Rating:
PN10 / PN16 / Class150 ...
Top Flange: Available in ISO 5211 standard for direct actuator mounting
Operating Temperature Range: -20℃ to 120℃ (eg: EPDM)
Customization: All materials, dimensions, and pressure ratings can be modified according to customer requirements
Type: CBF03-TA01--Product Catalog
1. Two-Shaft Design–Easy Maintenance & Reduced Seizure Risk
The valve uses separate upper and lower shafts instead of a single through-shaft.
Simplified Disassembly: Removing the upper stem does not require extracting the lower stem or disc, making inspection and seat replacement faster.
Lower Galling Risk: In aggressive media, a long single shaft is more prone to corrosion and seizure; two short shafts reduce the exposed surface area and simplify replacement.
Positive Torque Transmission: The upper and lower stems are securely coupled, ensuring reliable disc movement.
2. Worm Gear Operator – Effortless, Self-Locking Control
The turbine-type gearbox is designed for smooth manual operation, especially on larger valves (DN200 and above).
High Mechanical Advantage: The gearbox multiplies input torque, reducing handwheel effort significantly.
Self-Locking Function: The worm gear holds the disc at any position without creeping – no need for additional brakes.
Clear Position Indication: A visual indicator on the gear housing shows open, closed, or intermediate positions.
3. CF8 Stainless Steel Disc & EPDM Seat – Proven for Water & HVAC
The standard material combination is well-suited for clean water, treated water, and mild fluids.
CF8 (304) Disc: Offers good corrosion resistance, strength, and ductility at a cost-effective price.
EPDM Seat: Provides bubble-tight shut-off, resists water, steam, and ozone, with a wide temperature range (-20°C to +120°C).
Upgrade Path: For oil, chemicals, or seawater, disc and seat materials can be changed upon request.
4. Compact Wafer Body – Space-Saving & Easy Installation
The wafer design installs directly between standard pipeline flanges using through-bolts.
Lightweight & Compact: No companion flanges needed, reducing total installed weight and space.
Fast Bolt-Up: Align between EN 1092 or ANSI B16.5 flanges and secure – no special tools required.
Standard Face-to-Face: Conforms to ISO 5752 / EN 558 Series 20, ensuring compatibility.
5. 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: EPDM, NBR, Viton, PTFE...
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.
1. We manufacture strictly according to customer specifications. Need a special disc or seat material? We produce it.
2. Our two-shaft design simplifies maintenance and reduces the risk of stem seizure.
3. Full documentation – material certificates, 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 team is ready to discuss your project and deliver a valve tailored to your exact needs.
