Valve Drive Parts

Trunnion Ball Valve Stem / Fixed Ball Valve Shaft

This part is the lower shaft for fixed ball valves, used to support the lower end of the ball body and limit axial movement. It is suitable for large diameter or high pressure working condition, connected with the ball body through thread or pin hole, and installed in the lower support hole of the valve body.

Technical Parameters

- Material: • Manufactured using carbon steel, stainless steel (304/316), or duplex grades like 2205, the fixed ball valve lower stem is engineered for demanding mechanical and industrial applications.

- Structure: Available in sizes ranging from DN15 to DN600; modifications are made based on specific system integration needs or pressure constraints.

- Surface roughness: Production process includes high-precision casting, CNC machining, heat treatment, and surface coating tailored to the function of the fixed ball valve lower stem.

- Tolerance: Fully conforms to GB, ASME/ANSI, and EN/DIN industrial standards, and can be adapted to customer-defined specifications.

Application & Installation

Application

The fixed ball valve lower stem is widely used in sectors including oil & gas, power generation, water treatment, and clean-flow industries, depending on system type.

Installation Precautions

Before assembly, the surface of hole and shaft should be cleaned and checked without burr. After fastening, check that the ball opens and closes smoothly to avoid interference.

Processing and Delivery Support

- Support for customisation according to drawing (OEM Trunnion Shaft for Ball Valve)

- Material certificate EN 10204 3.1 is available.

- Measurements are taken and recorded before delivery

- Surface can be sandblasted, electropolished or phosphated.

Frequently Asked Questions (FAQ)

Q: Can you produce a fixed ball valve lower stem based on a physical sample?

A: Yes, we can reverse engineer from your sample or drawing and provide a production-ready version.

Q: What’s the minimum order quantity for fixed ball valve lower stem orders?

A: Typically 3–5 pieces, though smaller batch trials can be supported for new or customized designs.