Sealing Shielding

Seal Identification Methods: Part Printing | Sealing Fundamentals

Printing on parts is another fast and simple way to identify a seal. The printing method can convey more information about the seals and therefore can offer additional benefits beyond seal differentiation during assembly. 

Seals as information storage

Let’s consider the following example of chamber door gaskets in environmental test chambers. After a period of time, the chamber door gaskets must be serviced and replaced to ensure their optimal sealability. Depending on the frequency at which the test chamber operates, each gasket is replaced at a different time in the year. To simplify the servicing process, each chamber door gasket has the seal information – part number, the manufacture’s name and the manufacturing date - printed on the seal or embedded in the seal. As a result, the chamber servicing crew only needs to check the information on the seal and find the exact replacement. This method helps the crew reduce the time spent chasing down paperwork to find the corresponding replacement part.

Printing on parts as a method of seal identification and seal information storage

Like color coding, the printing method consists of several non-permanent printing techniques and a permanent printing technique. Not only can this method help with seal differentiation and installation, it can also aid in part traceability and servicing, ensure Parker’s part origin and authenticity, and support customer’s brand awareness.    

Non-permanent method

The non-permanent printing options include the Parker logo, a customer logo, customer name, part number, lot / batch number, address, phone number, alpha and numeric characters and other relevant seal information. Most of these details are typically printed on the seal’s outer surface so that the information is apparent and easily accessible. The Parker logo or a customer’s logo is commonly applied on the outside surface for branding purpose.

Relevant seal information is printed on the chamber door gasket.

Part number and logo printed on seals

Permanent method

The permanent printing option is Parker’s proprietary technique which yields a low degree of surface visibility but remains evident even after the seals have been used and disassembled. This proprietary permanent printing technique can supply a higher level of seal information and generally can help authenticate and ensure Parker’s part origin, protecting the customers against counterfeit seals.

Both permanent and non-permanent printing techniques are non-abrasive to the seal as well as to the application’s operating environments. Printing and marking options are compatible with a majority of conventional seal coatings and do not compromise the seal integrity. The print location is mostly outer seal surface; requests for inner surface and cross section print locations should be reviewed and confirmed by Parker’s Application Engineers.

For a summary of visual seal identification methods,view the “Part Printing and Marking” bulletin (TSD 5435). Please direct any further questions and inquiries about each or all of these methods to the Application Engineering department via the Parker O-Ring & Engineered Seals Division website. 



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Sealing Fundamentals | How to Properly Install a Parker Hollow O-ring


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