Warranty Information Policy

The buyer's warranty rights assume that the product shipped be inspected upon receipt and all defects reported to Deublin in writing immediately or for no longer than a period of 2 weeks.  Hidden defects must be reported to Deublin in writing immediately upon detection.  The warranty is void when they Deublin Rotary Union is tampered with or misused in any way.  Otherwise, our General Terms of Sale and Delivery are valid.  It cannot be emphasized enough that all dynamic seal components are wear parts. 

Deublin will not be held liable for damage resulting from improper use, incorrect warehousing, incorrect transport, faulty assembly, faulty operation, insufficient maintenance, incorrect handling, improper installation by the customer, the use of inappropriate accessories or spare parts and natural abrasion.  Please request our General Terms of Sale and Delivery. 

Rotary Union Warranty Evaluation Form

Slip Ring Warranty Evaluation Form

Lubrication and Maintenance

Depending on the Deublin product series and the operating parameters all Deublin Rotary Unions are either lubricated for life or have to be relubricated or serviced according to specially defined intervals.  Please follow the respective operating instructions or the general "Relubrication Guide" for Deublin Rotary Unions. 

Filtering

The service life of the seal is largely determined by filter quality and thus of vital importance for the proper operation of the Rotary union.  We recommend filtration of min. 60 µm.  All installation and operating instructions must be carefully reviewed and strictly followed. 

Service and Maintenance of Deublin Rotary Unions by Deublin

Use only Deublin spare parts for service of the Deublin Rotary Unions.  Prior to service contact Deublin or any authorized Deublin representative.  You can find a local Deublin representative Distributor Locator | Deublin Company.

Most unions can be reconditioned in the field by use of Deublin Service Kits.  Generally, we recommend having the Deublin Rotary Unions serviced by Deublin.  Service is available at all Deublin factories.  Factory rebuilt Rotary Unions carry a "New-Union-Warranty."

Tension-free Installation

When installing Rotary Unions, special attention has to be paid to a flexible and tension-free hose connection.  For additional recommendation please refer to our installation instructions. 

Factory Testing

All Deublin Rotary Unions are factory-tested under pressure prior to shipment.  This thorough check ensures that each single Deublin Union is completely operational when you receive it and can - in most cases - be installed with no further consideration. 

WARNING

Deublin Rotary Unions should not be used to convey flammable media (flash point ≤ 140°F or 60°C) as leakage may result in explosions or fires. Deublin Rotary Unions should be used in accordance with standard safety guidelines for the media, and in a well-ventilated area. The use of our product on hazardous or corrosive media is strictly forbidden.

For any operating conditions other than stated in a Deublin catalog or IC (Interface Control) drawing, contact Deublin’s Engineering Department for guidance and recommendations.

Important

A Deublin Rotary Union is a precision-made piece of equipment and must be handled accordingly.  Sealing between the rotating device – rotor – and the static device – stator – is mainly accomplished via floating seals.  Improper use could result in premature leakage or failure.

Although Deublin Rotary Unions are of the highest quality and precision they are, by their very nature, a “wear and tear” product.  It’s important that they should be inspected periodically.  Moreover, when seals wear out, the Rotary union must be replaced or serviced to avoid subsequent leakage.  Once a union begins to leak, it is paramount that the union be serviced immediately.  Never work with leaking unions!

Deublin Rotary Unions must never be used for applications other than those specified in the catalog.  It is strictly prohibited to us Deublin Rotary Unions with hydrocarbons or other flammable media as leakage may result in a fire or explosion.  The use of our product on exotic or corrosive media is strictly prohibited without our prior approval.  For applications other than those stated in the catalog.  Deublin Engineering Department should be contacted for proper instructions.  These instructions are provided by Deublin as general guidelines and do not contain exhaustive information about the installation, use or maintenance of unions.  Operating instructions and installation manuals are available for Deublin products.  Buyers and users of Deublin Rotary Unions should be certain that they have reviewed all of Deublin’s product information.  The operating and installation instructions must be strictly followed when installing Deublin Rotary Unions.