Apple Rubber's Seal Design Guide

Vacuum Situations

To make effective vacuum seals, O-rings must be comprised of elastomeric materials featuring low gas permeability, low weight loss under vacuum, and good compression set characteristics.

Best Choice(s)

Butyl excels as the most impermeable performer, followed by several other elastomers including Fluorocarbon, offering good to excellent resistance to gas permeation.

Apple Rubber Products, Inc. • 310 Erie Street • Lancaster, NY 14086 • 1.800.828.7745

1. Introduction

2. Products & Services

3. O-Ring Basics

4. Seal Types & Gland Design

5. Critical Operating Environmental Factors

6. Material Selection Guide

7. Special Elastomer Applications

8. Troubleshooting

9. Sizes & How to Order

10. Glossary of Terms

11. Rules of Thumb

12. Formulas

13. Seal Glossary

14. Bibliography / Trademarks