For Stainless Steel Enclosures   For Polymer Enclosures

Automatic RB® (Relief/Bleed) Valve

• Continuously bleeds off excess internal gas to maintain a safe positive pressure inside glove boxes
• Variable release mechanism automatically discharges any sudden surge of incoming gas
• Protects against accidental negative pressure by functioning as a check valve
• Extends life of doors and gaskets
• 100% reliable, noncontaminating and maintenance-free! The Automatic RB® Valve ensures a safe, continuous positive pressure in Terra Universal glove boxes, desiccators, and other purged enclosures.

It provides three crucial functions. During normal operation, it allows a continuous low-level release of gas to maintain a safe internal positive pressure. In the event of a sudden increase in the incoming gas supply, it automatically opens to relieve the high pressure. Finally, it functions as a check valve to ensure that air and contaminants cannot enter the enclosure in the event of a momentary negative pressure.

Most important, it provides operator peace of mind. Its field-proven reliability guarantees that your cabinets maintain a safe positive pressure, even when subjected to a high-flow of purge gas. It also safeguards your investment in a processing chamber by preserving doors and seals.

Static-Dissipative PVC Design for Series 100, 500 and 600 Glove Boxes

For effective pressure relief select one valve per air lock (up to 8 cu. ft.) and two valves per glove box (up to 45 cu. ft.)

Stainless Steel Design for Series 300 and 400 Glove Boxes

Both models come with all necessary mounting hardware. Installation is included if ordered with glove box.