Dafram Ball Valve Identification & Supply Support

Identify Dafram ball valves from tag plates, cast markings, and dimensions — and source replacements.

Dafram – precision-engineered Italian ball valves

How to Identify a Dafram Ball Valve

Dafram ball valves can usually be identified from a combination of body markings, dimensions, and — where fitted — tag plate information. (Or, a datasheet like in the image to the right/below!)

On older installations, tag plates may be missing or were not supplied, so identification often relies on the valve body itself.

Cast or stamped markings may include:

DAFRAM name or logo
Nominal size (e.g. DN50, 2″)
Pressure rating (e.g. PN40, Class #150)
Material or heat/casting numbers (e.g. CF8M, WCB)
- These marking are often the most reliable identifiers on older or inherited valves.

Some Dafram valves are supplied with tag plates:

If present…

these can typically be found on the end connections: the flange rim or nearer the welded end.
They may show:
- Model or series
- Size and pressure rating
- Body / trim materials
- Applicable standards e.g. API 607 (Fire safe)
If not present, casted / stamped details are more likely.

Without paperwork, tags or cast/stamped markings, the following dimension and construction details are most useful:

End connections (flanged / threaded / welded)
Face-to-face length
Body style (1-piece / 2-piece / 3-piece)
Reduced or full bore
Presence of ISO 5211 direct mount pad (if actuated / gearbox)

If markings are unclear or incomplete, clear photos of the valve body, ends, and overall construction are usually sufficient to confirm the specification.

Email photos for identification

Common Dafram Ball Valve Types & Configurations

Dafram manufacture a range of ball valve designs for different pressure classes, materials, and applications.

The configurations below reflect commonly encountered Dafram ball valve constructions.

1. Body construction +

Body construction is usually the first feature engineers assess when identifying a Dafram ball valve.

Common body constructions include one-piece, two-piece, three-piece, and split-body designs.
One-piece bodies are compact but offer limited serviceability.
Two- and three-piece designs allow improved access to internal components such as the ball and seats.
Split-body designs are often used on larger sizes or higher-pressure valves.
Body construction directly affects maintenance access, downtime, and replacement options.

2. End connections +

Dafram ball valves are supplied with a range of end connection types to suit different piping standards.

Common end connections include flanged, threaded, and welded designs.
Flanged valves are typically manufactured to EN PN or ASME Class standards.
Threaded connections are more common on smaller sizes or auxiliary services.
Welded connections may be butt weld (BW) or socket weld (SW) and are often used where permanent installation is required.
End connection type is a key factor when identifying a valve and selecting a suitable replacement.

3. Bore type +

Dafram ball valves may be manufactured with either a full bore or reduced bore design.

Full bore valves have an internal passage close to the nominal pipe diameter.
Reduced bore valves have a smaller internal passage through the ball.
Bore type affects pressure drop, flow characteristics, and the ability to pig a pipeline.
Bore type is often inferred from valve dimensions when documentation is unavailable.

4. Materials +

Dafram ball valves are manufactured in a range of materials depending on service conditions.

Common body materials include carbon steel and stainless steel.
Alloy materials may be used where additional corrosion resistance or mechanical strength is required.
Internal trim materials may differ from the body material.
Where original documentation is missing, material identification may rely on markings, appearance, or historical plant standards.

5. Actuation +

Dafram ball valves can be supplied for manual or automated operation.

Manual valves are typically operated using a lever or gearbox, depending on size and torque.
Automated valves may be fitted with pneumatic or electric actuators.
Actuators may be factory-fitted or added later in service.
Many actuated Dafram valves use standard mounting interfaces, such as ISO 5211, although this should be confirmed for each application.

Replacement & Supply Support for Dafram Ball Valves

Dafram ball valves are commonly installed in process, industrial, and OEM applications, where long service life and dimensional consistency are important.

Where a Dafram valve requires replacement or additional units are needed, we can assist by:

Confirming the existing valve specification from markings, dimensions, or photographs
Checking body construction, materials, bore type, and end connections
Reviewing seat materials and pressure class where relevant
Advising on direct Dafram supply or technically equivalent alternatives, depending on availability and application

Where original documentation is unavailable, identification is typically based on physical characteristics and dimensions, rather than paperwork alone.

The objective is to maintain functional and dimensional equivalence, avoiding unnecessary changes to pipework or actuation wherever possible.

What to Send for Identification or Quotation

To help identify or supply a Dafram ball valve, engineers typically provide one or more of the following:

Photographs of the valve body and ends
Any tag plate or stamped markings, where present
Nominal size and pressure class, if known
Basic service information (media, pressure, temperature)
Actuation details, where applicable

Full datasheets are not required to start the process.
In many cases, clear photographs alone are sufficient to confirm the specification.

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