For 25+ years, Rotary Airlock has been rebuilding failed OEM valves and upgrading them from hands experience. The other OEMs don't offer the materials you need for your application because to them it isn't profitable. Rotary Airlock does business different. We do business the right way because we provide solutions and have developed packages for your industry SPECIFICALLY, so you can rest assured your valve will run the way you deserve right from the start with an RAS Valve or we can rebuild your current valve with all the upgrades you need for a fraction of the cost.