Valve Drive Parts

Galvanized Carbon Steel Valve Coupling (1).jpg

Galvanized Carbon Steel Valve Coupling (2).jpg

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Galvanized Carbon Steel Valve Coupling

Name: Galvanized Carbon Steel Valve Coupling
Rating: 5 (64 reviews)

This coupling is used for rigid connection between an actuator and valve stem. Made from solid carbon steel, machined from round bar. Inner bore with keyway for torque transmission. Zinc-plated surface for basic corrosion protection. Dimensions made to drawing. Typically used on ball valves and butterfly valves.

Size Customized according to customer drawings and requirements.
Material A105 / 45# Steel; stainless steel options are available upon request.
Surface Treatment Galvanizing; other surface treatments are available according to customer requirements.

Construction

The coupling is turned from round bar stock. Outer diameter and both end faces are machined concentrically. Bore is drilled and keyway milled according to shaft size. Some versions include tapped holes on the side or end face for set screw locking. Surface is acid cleaned and zinc-plated. Coating thickness approx. 6–8 µm.

Dimensions & Specs

Typical Applications & Installation

Typical Applications

- Connection between actuator shaft and valve stem

- For use in automated valve systems (ball/butterfly valves)

- Installed in pipelines, water plants, chemical and energy systems

Installation

1. Clean bore and mating shaft; remove dirt or grease.

2. Align shaft key with keyway.

3. Insert coupling and secure with set screws or clamp.

4. Perform no-load test rotation to verify fit.

Machining Notes & Inspection Checklist

Machining Notes

- Dimensions based strictly on drawings.

- Key size, bore, and length made to spec.

- Degrease and derust before plating.

- No polishing or edge rounding after plating.

Inspection Checklist

- Check keyway width and depth.

- Confirm bore and OD dimensions.

- Inspect coating for peeling or rust.

- Ensure face flatness and bore centering.

Frequently Asked Questions (FAQ)

Q: How long does it take to provide samples?

A: Sample lead time for regular products is 7 to 12 days. For finishing parts such as couplings, lower shafts, etc., the specific lead time depends on the drawing and structure.

Q: What materials are available?

- Check keyway width and depth.

A: Commonly used materials include CF8, CF8M, 304, 316, A105, 2205 duplex steel, etc. The choice of material should be considered according to the working medium, pressure and temperature.

DETAIL PICTURE

Galvanized Carbon Steel Valve Coupling (2)

Galvanized Carbon Steel Valve Coupling (3)

Galvanized Carbon Steel Valve Coupling (4)

Item	Range	Remarks
Material	Q235 / 45#	Stainless steel available on request
Length	30–150 mm	Custom per drawing
Inner Bore	Ø10–Ø60 mm	Standard H7 fit
Keyway	Width 3–18 mm	Per GB/T 1095
Surface	Zinc plating	Blue-white or yellow chromate
Coaxiality	≤0.03 mm	Runout controlled

Galvanized Carbon Steel Valve Coupling

Construction

Dimensions & Specs

Typical Applications & Installation

Machining Notes & Inspection Checklist

Frequently Asked Questions (FAQ)

DETAIL PICTURE

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