Product Introduction1
Ductile Iron Gear Operated Butterfly Valves with wafer-style ends combine mechanical advantage with compact design for superior flow control. The gear operator reduces required operating torque by up to 90% compared to direct handle operation, making large valve control accessible and safe. Featuring fully encapsulated gears, adjustable packing, and replaceable seat inserts, these valves deliver long-term performance with minimal maintenance. Their flange-mounted installation provides a rigid, leak-proof connection that withstands system pressure fluctuations and thermal expansion in demanding applications from water works to chemical processing plants worldwide.
Product Parameter
|
Product Name |
Butterfly Valve 4 Inch |
|
End Connection |
Wafer |
|
Pressure Max |
363 PSI /25 Bar |
|
Standard |
ANSI / GB/BS |
|
Size Range |
2'' to 12'' (DN50 to DN300) |
|
Color |
Red/Blue |
|
Surface Finishing |
Epoxy Paint Coating |
|
Application Medium |
Water |
|
Application fields |
Fire protection system, Water supply project |
Product Material
|
Body |
Ductile Iron QT450-10 |
|
Handwheel |
Ductile Iron QT450-10 |
|
Disc |
Ductile Iron ,covered by EPDM / 304 Stainless Steel |
|
Stem |
2CR13 Stainless Steel/304 Stainless Steel |
|
Spring |
304 Stainless Steel |
|
Seal |
NBR(Standard) |
Operation Guide & Key Notes
- Installation: Position between flanges, align bolts, and tighten evenly in cross pattern
- Operation: Turn gearbox handwheel clockwise to close, counterclockwise to open
- Pre-Use Check: Verify free movement before system pressurization
- Maintenance: Lubricate gears annually and cycle valve quarterly if unused
- Safety: Always depressurize system before maintenance activities
- Inspection: Check for seal wear and external corrosion during shutdowns
- Alignment: Ensure proper flange alignment to prevent binding
- Pressure: Never exceed rated pressure shown on valve nameplate
- Temperature: Confirm media temperature matches valve specifications
- Storage: Keep in dry environment with gear mechanism protected
Product Features
- Gear Operation: Provides mechanical advantage for easy handling of large valves
- Compact Design: Wafer style saves space and reduces weight
- Durable Construction: Ductile iron body with epoxy coating
- Corrosion Resistance: Stainless steel stem and components
- Bubble-Tight Seal: Quality seat materials ensure zero leakage
- Precision Gearing: Enables smooth operation and precise control
- Bi-Directional Flow: Effective sealing in both flow directions
- Low Maintenance: Simple design requires minimal service
- Standard Compliance: Meets international quality standards
- Versatile Application: Suitable for multiple industries and media
FAQ
Q: When should I choose a gear operator instead of a simple handle?
A: Opt for a gear operator when dealing with valves 6 inches and larger, or in systems with pressure over 150 PSI. The gearbox provides crucial mechanical advantage, making it possible to operate the valve without excessive force. It's essential for applications where a standard handle would be too difficult to turn, ensuring reliable operation in critical moments.
Q: How does the gear mechanism improve valve performance?
A: The enclosed gear system multiplies your input torque, allowing smooth operation of large discs against high flow pressure. Precision-cut gears ensure consistent performance without slipping or binding. This design also protects internal components from weather and corrosion, significantly extending the valve's service life compared to direct-handle models.
Q: Can this valve be automated later if needed?
A: Yes, most gear-operated wafer valves can be upgraded to full automation. The gear operator can be removed and replaced with an electric or pneumatic actuator without replacing the valve body. This future-proof design allows for cost-effective manual operation now with the option to automate as your system requirements evolve.
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