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Home > Industrial Equipment & Components > Valve > Butterfly Valve > Wafer Type Lever Operated Butterfly Valve GB/T3036 DN200 for HVAC System Ductwork

Wafer Type Lever Operated Butterfly Valve GB/T3036 DN200 for HVAC System Ductwork

Wafer Type Lever Operated Butterfly Valve GB/T3036 DN200 for HVAC System Ductwork thumbnail-3

Wafer Type Lever Operated Butterfly Valve GB/T3036 DN200 for HVAC System Ductwork thumbnail-4

Wafer Type Lever Operated Butterfly Valve GB/T3036 DN200 for HVAC System Ductwork thumbnail-5

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Wafer Type Lever Operated Butterfly Valve GB/T3036 DN200 for HVAC System Ductwork photo-4

Wafer Type Lever Operated Butterfly Valve GB/T3036 DN200 for HVAC System Ductwork photo-5

Product Spotlights

GB/T3036 standard wafer butterfly valve in DN200, featuring lever operation for clear visual positioning and easy manual control. Compact wafer design reduces weight and installation cost. Resilient seat ensures bubble-tight shut-off for HVAC ductwork, enhancing system efficiency. Durable construction with material options suits various air handling applications. Ideal for space-saving, reliable flow control in ventilation systems.

Negotiable MOQ: 1 Unit (Price negotiable depending on order volume and customization)

Key Specifications

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Standard:

GB/T3036

Nominal Diameter:

DN200

Operation Type:

Lever Operated

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Shanghai Zhibang Valve Manufacture Co.,ltd

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

China

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Standard GB/T3036

Nominal Diameter DN200

Operation Type Lever Operated

Connection Type Wafer Type

Primary Application HVAC System Ductwork

Body Material Cast Iron, Ductile Iron, or Stainless Steel

Disc Material Cast Iron, Stainless Steel, or Coated

Seat Material EPDM, NBR, or PTFE

Pressure Rating PN10, PN16, or as per standard

Temperature Range Varies with seat material

As a dedicated manufacturer, Shanghai Zhibang Valve Manufacture Co., Ltd. specializes in providing high-quality, reliable valve solutions for global HVAC and industrial applications. Our Wafer Type Lever Operated Butterfly Valve, compliant with GB/T3036 standard in DN200 size, is engineered to deliver precise flow control and dependable sealing within ductwork systems. We combine robust construction with user-friendly operation to meet the rigorous demands of modern ventilation and air handling projects.

This valve is designed as a cost-effective and space-saving solution for on/off and throttling services in HVAC systems. The lever operation provides clear visual indication of the valve position—open, closed, or intermediate—making it ideal for manual control points where quick and easy operation is essential. Its wafer-type design simplifies installation between flanges, reducing overall weight and system cost without compromising performance.

Key Features & Technical Advantages:

Compact & Lightweight Wafer Design: The valve installs directly between pipeline flanges using bolts, eliminating the need for companion flanges. This significantly reduces weight, required space, and installation costs compared to lug or flanged body designs.
Clear Visual Positioning with Lever Handle: The lever operator provides an immediate, unambiguous indication of the disc position. A simple 90-degree rotation moves the disc from fully open to fully closed, allowing for quick manual adjustment or isolation.
Excellent Sealing Performance: Equipped with a resilient seat (options like EPDM, NBR, or PTFE), the valve ensures bubble-tight shut-off in both directions, minimizing leakage and energy loss in HVAC ductwork.
Durable Construction for HVAC Environments: The valve body is typically made from cast iron or ductile iron with corrosion-resistant coating, while the disc can be stainless steel or coated cast iron, suitable for handling air and non-aggressive gases in HVAC applications.
Low Torque Operation & Long Service Life: The design minimizes operating torque, making the lever easy to turn even after prolonged periods. The robust stem and disc connection ensure reliable performance over many cycles.
Bi-Directional Flow Capability: The symmetrical disc and seat design allow the valve to seal effectively regardless of flow direction, providing flexibility in system piping layout.

Technical Specifications Table (Typical for DN200):

Parameter	Specification
Design & Manufacturing Standard	GB/T 3036 (Chinese National Standard)
Nominal Diameter (DN)	200
Connection Type	Wafer
Operation Type	Lever Operated
Pressure Rating (PN)	PN10, PN16 (Common)
Body Material	Cast Iron, Ductile Iron (Optional coatings available)
Disc Material	Cast Iron, Stainless Steel (e.g., CF8/304)
Seat Material	EPDM (Standard for water/air), NBR, PTFE (for wider temp.)
Temperature Range (Seat Dependent)	EPDM: -20°C to +120°C; PTFE: -30°C to +200°C
Face-to-Face Dimension	As per GB/T 3036 standard for DN200 wafer valve

Benefits for Your HVAC Project:

Cost-Effective Installation: The wafer design lowers material costs by eliminating valve flanges and reduces labor time during installation.
Enhanced System Efficiency: Tight sealing minimizes air leakage, helping to maintain designed pressure and flow rates, which contributes to energy savings.
Reliable Manual Control: The lever offers simple, tool-free operation for maintenance, balancing, or emergency isolation, reducing downtime.
Space Optimization: Its compact profile is advantageous in tight spaces common in mechanical rooms or ductwork.
Versatile Application: Suitable for air handling units, fan coil units, ventilation ducts, and other air distribution systems.

Shanghai Zhibang Valve Manufacture Co., Ltd., established in 2016 and holding ISO9001 certification for our quality management system, brings a commitment to consistent product quality and reliable performance. Our annual export value reflects the trust of clients across diverse markets including North America, Europe, Southeast Asia, and beyond. We support this global reach with flexible shipment options from major ports like Shanghai, Guangzhou, and Hong Kong. Choosing our GB/T3036 DN200 Wafer Butterfly Valve means selecting a product backed by manufacturing expertise, a systematic quality approach, and a proven track record in supplying valves for international HVAC projects. Contact us today to discuss your specifications or request a detailed quotation.

Frequently Asked Questions (FAQ):

Q: What is the main advantage of a wafer-type design over a lug-type butterfly valve?
A: The wafer-type valve is designed to be installed between two pipeline flanges using through-bolts. It is lighter, more compact, and generally more cost-effective than a lug-type valve, which has threaded inserts allowing it to be installed at the end of a pipeline. Wafer types are ideal for inline applications between two flanges.
Q: Can this lever-operated valve be used for flow regulation (throttling), or is it only for on/off service?
A: While primarily designed for on/off isolation, the lever-operated butterfly valve can be used for basic throttling or flow regulation by positioning the lever at intermediate angles. For precise and frequent flow control, a gear operator is often recommended.
Q: What seat material is recommended for standard HVAC air duct applications?
A: For standard HVAC applications involving air at moderate temperatures, EPDM (Ethylene Propylene Diene Monomer) is a common and recommended seat material due to its good sealing properties, flexibility, and resistance to aging from exposure to air and ozone.
Q: Is the DN200 size compatible with international flange standards like ANSI?
A: The valve is manufactured to the Chinese GB/T 3036 standard. While the nominal diameter (DN200) corresponds to 8 inches, the flange facing dimensions, bolt hole circle, and other details may differ from ANSI standards. It is crucial to verify compatibility with your specific flange standards or request valves built to other standards if required.
Q: What maintenance does this valve require?
A: These valves are designed for low maintenance. Periodic visual inspection of the lever and disc position, and checking for external signs of leakage, is typically sufficient. The resilient seat is wear-compensating, but if leakage occurs, seat replacement might be necessary, which often requires disassembling the valve from the line.
Q: Can the lever handle be locked in position?
A: Yes, many lever operators come with holes in the handle or a padlock provision that allows the valve to be locked in the fully open or fully closed position for safety or operational security purposes. This feature can be confirmed upon inquiry.
Q: What is the typical delivery time for an order of these valves?
A: Delivery time depends on order quantity and current production schedule. For standard DN200 valves with common specifications, we often have stock or can produce them with a relatively short lead time. Please contact us with your specific requirements for an accurate timeline.
Q: Do you offer valves in sizes other than DN200?
A: Absolutely. As a manufacturer, we produce wafer butterfly valves in a wide range of sizes, typically from DN50 to DN600 or larger. We can provide the appropriate valve size for your specific ductwork or pipeline requirements.