Products Description
Overview
Worm gear butterfly valve consists of:
Body type: Wafer - fits between two flanges in the pipeline and is held in place by bolts. It's compact, lightweight, and ideal for limited-space installations.
Disc: The rotating element that opens or closes the flow path.
Seat: Provides a tight seal when the valve is closed.
Stem (shaft): Connects the disc to the actuator.
Worm gear operator: A handwheel-operated gearbox that uses a worm-and-gear mechanism to reduce torque and allow precise control.
Features
Product Name: Worm gear butterfly valve
Material: Ductile Iron
Working Pressure: 1.6Mpa
Surface Finishing: Epoxy Red or Blue
Products Parameter
forede® worm gear wafer butterfly valve with different size and standard for option:
| Model | Material | Size | Working Pressure |
Surface Finishing |
| ZSXDF7-Q-50-16 | Ductile Iron |
DN50(2'') |
16 bar |
Epoxy Red or Blue |
| ZSXDF7-Q-65-16 | Ductile Iron |
DN65(2.5'') |
16 bar |
Epoxy Red or Blue |
| ZSXDF7-Q-80-16 | Ductile Iron |
DN80(3'') |
16 bar |
Epoxy Red or Blue |
| ZSXDF7-Q-100-16 | Ductile Iron |
DN100(4'') |
16 bar |
Epoxy Red or Blue |
| ZSXDF7-Q-125-16 | Ductile Iron |
DN125(5'') |
16 bar |
Epoxy Red or Blue |
| ZSXDF7-Q-150-16 | Ductile Iron |
DN150(6'') |
16 bar |
Epoxy Red or Blue |
FAQ
Q: What materials are commonly used?
Body: Cast iron, ductile iron, stainless steel, or carbon steel
Disc: Stainless steel, ductile iron, or aluminum bronze
Seat: EPDM, NBR, PTFE, or Viton
Worm Gear Housing: Cast iron or aluminum alloy
Q. What are the connection types available?
Wafer type (fits between flanges)
Lug type (threaded inserts for bolts)
Flanged type (integral flanges for bolting)
Q. What is the difference between a lever-operated and worm gear-operated butterfly valve?
Lever-operated: Used for small sizes (≤ DN200), quick quarter-turn action.
Worm gear-operated: Used for larger sizes (> DN200), offers mechanical advantage and precise control.
Q. How do you maintain a worm gear butterfly valve?
Periodically lubricate the worm gear mechanism
Check for leakage around the stem and seat
Ensure the gearbox is free from dust and moisture
Exercise (operate) the valve periodically to prevent sticking
Q. Can a worm gear butterfly valve be automated?
Yes. The worm gear operator can be replaced or adapted with electric or pneumatic actuators for automated control.
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