Description

The butterfly valve plate, also called a butterfly valve disc, is the rotating component inside a butterfly valve. It is connected to the valve shaft and changes its angular position to regulate or shut off fluid flow.

In large hydropower butterfly valves, the disc operates under hydraulic loads and repeated opening and closing conditions. Its design influences flow resistance, mechanical strength, operating torque and sealing performance.

For large-diameter applications, the butterfly disc is not simply a flat circular steel plate. Depending on the valve design, it may include reinforced ribs, a streamlined profile, shaft connection structures and specially designed sealing surfaces.

Typical engineering considerations include:

• Disc diameter and thickness must match the valve body and pipeline dimensions.

• Reinforcing ribs and structural transitions must provide sufficient strength under the specified hydraulic load.

• Shaft connection areas must meet machining and assembly requirements.

• Sealing surfaces must match the specified seat and sealing arrangement.

• Casting quality must be controlled in thick sections and complex structural areas.

Hydropower butterfly valves are available in project-specific sizes, with market references ranging from DN250 to DN4000 and larger product ranges in certain manufacturers' catalogs. The actual disc dimensions and loads are determined by the complete valve design, hydraulic head and operating conditions.

Tenfaye manufactures custom cast steel butterfly valve discs according to customer drawings and technical specifications. We can evaluate complex disc structures, material selection, casting process design, heat treatment, machining and specified inspection requirements.

Our overall single-piece casting capability covers 1–150 tons, subject to technical evaluation, providing a manufacturing option for heavy industrial valve components.

Advantages

1. Customized Disc Geometry and Reinforcement

Different butterfly valve designs require different disc profiles and structural arrangements. Tenfaye manufactures according to customer drawings, including customized disc thickness, reinforcing ribs, shaft connections and other structural features.

2. Large and Heavy Cast Steel Components

With an overall single-piece casting capability of 1–150 tons, Tenfaye can evaluate large valve disc castings and other heavy industrial components according to project dimensions, material requirements and casting feasibility.

3. Material Options for Engineering Requirements

Cast carbon steel and alloy steel can be selected according to the specified mechanical properties, operating environment and applicable standards. Material selection is evaluated against the actual valve design rather than using one fixed grade for all applications.

4. Machining of Critical Connection Areas

Shaft bores, mounting surfaces and sealing-related areas require accurate dimensional control. Tenfaye supports machining according to approved drawings and specified tolerances.

5. Casting Quality and Inspection

Large discs with thick sections and reinforced structures require careful control of metal feeding and solidification. Casting simulation and process planning help evaluate potential defects. UT, MT and dimensional inspection can be arranged according to customer requirements and applicable acceptance standards.