Skip to main content
O Rings U COV10 01
O Rings U COV10 01

O-rings

O-ring- universal

U-COV10

O-Rings are used in instruments, sampling accessories, and supplies products. Many should be checked and replaced regularly as part of a routine maintenance plan. There are a number of common user-maintainable O-rings used in Markes’ products, as well as custom O-rings for specific sampling accessories. The latter can be found on the same page as their main product.

  • User-replaceable
  • The most commonly used O-rings can be purchased in larger, more economical pack sizes
  • Refer to product manual/IFU for guidance, or talk to our technical team

Product List

Showing 10/11 results

O-ring- universal Image

O-ring- universal

Size 003- pk 10

Product Code

U-COV03

O-ring- universal Image

O-ring- universal

Size 006- pk 10

Product Code

U-COV06

O-ring- universal Image

O-ring- universal

Size 007- pk 10

Product Code

U-COV07

O-ring- universal Image

O-ring- universal

Size 010- pk 10

Product Code

U-COV10

O-ring- universal Image

O-ring- universal

Size 010- pk 100

Product Code

U-COV100

O-ring- universal Image

O-ring- universal

3.5 mm ID x 1.5 mm section- pk 10

Product Code

U-COV35

O-ring- universal Image

O-ring- universal

5.92 mm ID x 1.93 mm- pk 10

Product Code

U-COV45

O-ring- universal Image

O-ring- universal

5.92 mm ID x 1.93 mm- pk 100

Product Code

U-COV450

O-ring- universal Image

O-ring- universal

Size 201- pk 10

Product Code

U-COV201

O-ring- for Centri Image

O-ring- for Centri

Black- high temperature- for lower liner seal- pk 1

Product Code

U-COV108-H

Overview

O-Rings supplied by Markes are usually made of Viton. They are used to create a reusable seal between consumable items (such as a tube, trap or injector liner) and an instrument or its interface (such as a tube receiver or DiffLok cap).

The part numbers of the most commonly used O-rings are:

  • U-COV06: Used in the trap pneumatics of Markes’ instruments to seal the focusing trap.
  • U-COV07: Used in Markes’ tube autosamplers to seal the TD flow path against the external face of a DiffLok cap, and in the trap pneumatics of Kori-xr and TT24-7.
  • U-COV10: Used in industry-standard DiffLok caps, and on sample and split tube inlets/receivers for industry-standard tubes (6.35 mm o.d.), such as those in TC-20, µ-CTE, UNITY-xr, TD100-xr and the backpressure adaptor for ACTI-VOC.
  • U-COV45: Used in DiffLok caps for 4½″ DAAMS tubes, and on tube inlets/receivers for 6 mm o.d. tubes such as those found on the TC-20, µ-CTE and the backpressure adapter for ACTI-VOC.

O-Rings should be checked routinely to ensure optimum system performance and replaced in the event of a leak or if there is visible wear. They are included in Routine Maintenance Kits (RMKs), which contain sufficient spares for approximately 12 months of average use and are available for all Markes’ instruments and large sampling accessories. If additional O-rings are needed in the interim, or if they are needed for other products, they can be purchased separately.

Markes recommends using O-ring extraction and insertion tools, with gloves, when replacing O-rings.

Part numbers:
U-COV03 - U-COV06 - U-COV07 - U-COV10 - U-COV100 - U-COV108-H - U-COV108-L - U-COV201 - U-COV35 - U-COV45 - U-COV450