YDK Gear-Operated Butterfly Valve | Model KBF(WG)-16

On large-flow pipelines, water pressure acting on the valve disc generates a very high torque. This can cause a lever-operated butterfly valve to become difficult to operate or result in water hammer when the flow is suddenly shut off. To address this issue, An Phu Thanh has introduced the YDK handwheel butterfly valve (Model KBF(WG)-16).

This product is equipped with a gear-assisted reduction gearbox, allowing operators to easily open and close the valve and precisely regulate the flow rate. It also provides maximum safety for fire protection (PCCC), MEP, and water supply and drainage infrastructure systems.

Understanding the Gear-Assisted Mechanism of the YDK Handwheel Butterfly Valve

The key upgrade of the YDK handwheel butterfly valve, Model KBF(WG)-16, compared with the lever-operated butterfly valve lies in its mechanical gear transmission system:

• Gear-Assisted Reduction Gearbox: The worm and worm wheel gear mechanism smoothly converts the relatively light rotational force applied to the handwheel into a very high torque acting on the valve stem. As a result, even on large-diameter pipelines such as DN300, DN400, or DN500 with high flow pressure, operators can still open and close the butterfly valve with ease.
• Slow Opening and Closing Mechanism to Prevent Water Hammer: The gearbox transmission requires multiple turns of the handwheel to rotate the valve disc through 90º. This gradual opening and closing mechanism effectively prevents sudden pressure surges that could cause pipe bursts, cracked weld joints, or damage to flow meters.
• Opening Angle Position Indicator: A display disc is installed on top of the gearbox to show the actual opening angle of the valve disc (0º: Fully Closed – 90º: Fully Open), allowing engineers to easily monitor and control the flow rate remotely.

YDK KBF(WG)-16 Handwheel Butterfly Valve Dimension Reference Table

Below is the detailed dimensional data from the YDK catalogue for Model KBF(WG)-16, serving as a reference for shop drawings and pipeline installation:

YDK Handwheel Butterfly Valve Selection & On-Site Acceptance Experience

• Solution for pipelines from DN250 and above: According to technical recommendations, YDK handwheel butterfly valves should be prioritized over lever-operated butterfly valves for fire protection pipelines or pump stations from DN250 to DN500, helping protect operators from pressure surge risks.
• Installation & Wafer Clamping Bolt Tightening: The Z x Φd specifications on the YDK drawings correspond to the number and diameter of the positioning holes on the valve body. When installing the wafer-type valve between two flanges, engineers should prepare studs of the correct size, keep the valve slightly open at approximately 10º – 20º, and tighten the bolts symmetrically from the center in a cross pattern. This helps ensure the valve body remains properly balanced and prevents uneven tightening from causing the stainless-steel disc to become stuck or deforming the sealing rubber lining inside the valve.
• Regular Gearbox Maintenance: The mechanical gearbox should be inspected for fastening screws and lubricated every 6 – 12 months to ensure that the transmission mechanism does not become seized or corroded in the humid environment of pump stations.

Reliable YDK Handwheel Butterfly Valve Supplier in Vietnam

An Phu Thanh is an authorized supplier of YDK handwheel butterfly valves for factory buildings, high-rise residential projects, water supply and drainage works, fire protection systems, and technical infrastructure projects nationwide. We are committed to providing customers with comprehensive solutions:

• Optimized Material Costs: As a direct importer without intermediaries, An Phu Thanh offers competitive prices for YDK valves. We also provide attractive preferential policies for large-volume orders.
• Complete Documentation for Project Acceptance: All products shipped from our warehouse are accompanied by a complete set of CO (Certificate of Origin), CQ (Certificate of Quality), Packing List, and VAT invoice.
• In-Stock Products & Fast Delivery: With large storage facilities, we maintain ready stock of butterfly valves, along with various industrial valves and pipe fittings in a wide range of sizes. We also provide fast packing and transportation services, delivering materials directly to the project site.
• Transparent Warranty Policy: Like other YDK valve products, this product series comes with a 12-month official warranty.

Above is the information related to the YDK handwheel butterfly valve, Model KBF(WG)-16. If you need further product consultation or a quotation, please contact An Phu Thanh. Hotline / Zalo: 0946 729 913. Our staff are always ready to provide support.