Description

A butterfly valve body is the main pressure-containing housing of a butterfly valve. It connects the upstream and downstream pipelines and provides support for the rotating disc, shaft, bearings and sealing components.

In hydropower applications, large butterfly valve bodies are commonly installed between the penstock and turbine inlet. They are used for water isolation, emergency shut-off and flow-system protection.

Hydropower butterfly valves are available in a wide range of sizes. Industrial suppliers offer project-specific designs covering approximately DN250 to DN4000, with higher nominal diameters available in certain product ranges. Pressure requirements must be evaluated against the actual hydraulic head, transient pressure and operating conditions.

For large cast steel butterfly valve bodies, several manufacturing details are particularly important:

• Flange geometry and connecting dimensions must match the penstock and mating components.

• Shaft bores and bearing mounting positions require accurate machining.

• Valve seat mounting areas must meet the specified dimensional and surface requirements.

• Thick sections and complex transitions require careful control of solidification and internal casting quality.

Tenfaye manufactures large cast steel valve bodies according to customer drawings and technical specifications. Our overall single-piece casting capability covers 1–150 tons, subject to project evaluation.

We support custom material selection, casting process planning, heat treatment, machining coordination and specified non-destructive testing. This allows valve manufacturers and hydropower engineering companies to source large cast steel housings tailored to their equipment designs.

Advantages

1. Large Single-Piece Casting Capability

Tenfaye focuses on heavy cast steel components with individual casting weights of 1–150 tons subject to technical review. This provides a manufacturing option for large valve housings that require substantial structural sections and customized geometry.

2. Custom Flange and Shaft-Bore Design

Valve body drawings determine flange dimensions, shaft centerlines, bore positions, wall thickness and connection geometry. Tenfaye manufactures these features according to approved 2D drawings and 3D models.

3. Material Selection for Pressure-Bearing Applications

Cast carbon steel and alloy steel can be selected according to design pressure, temperature, water conditions and applicable material standards. ASTM A216 WCB and WCC are reference cast carbon steel grades for applicable industrial valve designs.

4. Controlled Casting and Heat Treatment

Large castings require careful gating, riser design, feeding and cooling control. Tenfaye uses casting process planning and simulation tools to evaluate potential shrinkage and other casting risks. Heat treatment is performed according to the specified material and mechanical property requirements.

5. Machining and Non-Destructive Testing

Critical flange faces, shaft bores and valve seat mounting areas can be machined according to customer drawings. UT and MT can be arranged according to the specified inspection standards, acceptance levels and project requirements.