For current current Koso Hammel Dahl products, please click here.

For original Koso Hammel Dahl products, call us at 570-522-8323.

For the GP50 Series Positioner, please click here.

Installation, Maintenance, and Operation manuals for current Koso Hammel Dahl products can be found here.

Installation, Maintenance, and Operation manuals for original Koso Hammel Dahl products can be found here.

Product specification sheets can be found here.

If you are unable to find the documentation you require, please contact us at (570) 522-8323. We will assist you the best we can in locating the documents you need.

Frequently Asked Questions

What technical documents are available from WTM Valves & Services?

WTM provides access to technical product information, installation, maintenance and operation manuals, specification sheets, GP50 Series Positioner information, and documentation covering current and original Hammel Dahl products.

Where can I find manuals for current Koso Hammel Dahl products?

WTM provides an online section containing installation, maintenance, and operation documentation for current Koso Hammel Dahl valve and actuator product lines.

Are technical documents available for original Hammel Dahl products?

Yes. WTM maintains documentation for numerous original Hammel Dahl products. Some material is available online, while additional documentation may be available by contacting WTM directly.

Is GP50 Series Positioner technical information available?

Yes. WTM provides a dedicated GP50 Series Positioner technical bulletin with information about the GP50 product line.

Does WTM provide product specification sheets?

Yes. Product specification sheets are available through the WTM Technical Documents section for supported products.

What should I do if I cannot find the technical document I need?

Contact WTM with the equipment model number, product series, tag or serial information, document number if known, and a description of the information required. WTM can assist in locating available documentation.

Should I verify that a technical document applies to my specific equipment?

Yes. Technical documents should be checked against the exact model, configuration, revision, and installed equipment before use. WTM specifically advises end users to confirm that a document is applicable to the equipment in their facility.