KEVN®

How It Works & How to Use It

• Place the o-ring on a stable table or surface. Hold the KEVN® in a vertical position so that the straight edge of the sliding weight hangs out the bottom of the steel tube.
• Position the straight edge of the weight on the o-ring’s cross-section and raise the weight all the way to the top of the tube (as far as it will go).
• Release the weight and let it drop onto the o-ring. The weight will bounce. The height of the first bounce will rise to one of the four calibrated ranges.

Where and When to Use

• To verify an o-ring just before installing the o-ring in the equipment.
• To differentiate between KNOWN o-ring materials.
• To check for mislabeled o-rings.
• To verify new o-rings.
• Sorting applications.

Best Conditions For Use

The KEVN® is calibrated to work best with the following:

• 70 durometer o-rings
• New and unused o-rings
• O-rings within their rated shelf life
• Cross-sections starting with .103” (2.62mm) up to .275” (6.99mm), including the standard AS568 series (100, 200, 300, & 400 series).

Do Not Use For:

• Identifying or analyzing failed or damaged o-rings
• O-rings of unknown composition
• Out-of-date o-rings
• O-ring cross-sections less than .103″ (2.62mm), or greater than .275″ (6.99mm)
• Identifying composition of flat gasket surfaces
• O-rings other than 70 durometer