O-Seal Valves deliver leakproof performance to 6000 PSI through thousands of operating cycles. Spacers replicate exact fact-to-face dimensions of valve they temporarily replace. When used during installation, they not only assure a perfect fit, they also eliminate risk of damage due to overheating from brazing or welding. Replacing valves with these spacers is also advisable when systems are flushed during maintenance. CPV Manufacturing, Inc. 851 Preston St. Philadelphia, PA, 19104