
Butterfly Valve Wafer Type Gear Operated
Product Introduction1

Gear Operated Wafer Butterfly Valves deliver powerful flow control in a compact, space-saving design. By integrating a precision gearbox, these valves provide high mechanical torque, making it effortless to operate large-diameter valves even in high-pressure systems. The valve installs directly between two pipe flanges, requiring no additional nuts or threaded ends, which simplifies installation and reduces overall weight and cost. Constructed from durable materials like ductile iron with epoxy coating and stainless steel stems, they ensure reliable, bubble-tight sealing for water, air, and other industrial media. This combination of easy operation, robust construction, and installation efficiency makes them an ideal solution for HVAC, water treatment, and various industrial processing applications.
Product Parameter
|
Product Name |
Butterfly Valve Wafer Type Gear Operated |
|
Connection Type |
Wafer |
|
Working Pressure |
16 Bar / 20Bar /25Bar |
|
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) |
Installation of Gear Operated Wafer Butterfly Valves
Proper installation begins with preparing the pipeline flanges. Ensure they are clean, parallel, and properly aligned with adequate space for the valve. Insert the valve between the flanges, making sure the disc is in the partially open position (approximately 15-20 degrees) to facilitate easier alignment and prevent damage to the seat. Install new gaskets on both sides. Insert all bolts through the flanges and hand-tighten the nuts. Finally, tighten the bolts gradually in a criss-cross pattern using a calibrated torque wrench to the manufacturer's specified values. This ensures even compression and prevents distortion of the valve body, which could lead to binding or leakage. Always cycle the valve fully to confirm free and smooth operation before putting the system into pressurized service.
Why the Gear Operated Wafer Valve is Your Only Choice for Big Lines?
The Gear Operated Wafer Butterfly Valve achieves its irreplaceable status by uniquely solving a critical engineering dilemma: how to control high-volume flow in large pipes with minimal physical effort and maximum space efficiency. No other valve type combines a compact, flange-sandwiching body with a mechanical gearbox in such a cost-effective package. For pipes typically 8 inches and larger, a simple handle provides insufficient torque, while installing bulky, expensive actuated valves is often impractical and costly. The gear operator is the perfect solution, multiplying human effort to make operation safe and manageable. Its compact wafer design saves significant space and weight compared to lug or flanged bodies, reducing structural support needs and installation costs. This specific combination of power, compactness, and value makes it the default, indispensable choice for main water lines, fire protection systems, and large-scale industrial piping where reliable manual control is non-negotiable.
FAQ
Q: How do I troubleshoot a valve that's hard to operate?
A: First, check if the pipeline is depressurized - pressure can lock the disc. Then verify flange bolts aren't over-tightened, causing body distortion. If these are fine, the issue may be debris in the seat or damaged gears. Never force the operator; contact technical support for diagnosis and avoid costly damage to internal components.
Q: What's the typical lifespan of these valves?
A: When correctly installed and operated periodically, these valves are designed to provide dependable performance for approximately 15 to 20 years. Their construction utilizes a corrosion-resistant ductile iron body and stainless steel internal parts. The enclosed gear operator is engineered to withstand more than 10,000 operational cycles. To support long-term use, the primary component subject to wear is the seal (seat), which is designed for replacement during routine service, thereby allowing the valve's operational life to be sustained long-term.
Q: Can I get customized valves for non-standard applications?
A: We regularly customize valves for special requirements including unusual sizes, exotic materials, and special coatings. Whether you need a specific epoxy color for coding or special stem extensions for hard-to-reach locations, our engineering team can modify standard designs. Lead times for custom valves typically add 2-3 weeks to standard delivery.
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