Zahroof Valves, Inc. (ZVI) is an innovative company, with its headquarters in Houston, Texas, that has developed and now markets the revolutionary straightflo valve (SF) for use in reciprocating gas compressors. The SF delivers a step change in valve performance, serviceability and reliability. As a result of these proven and measured improvements, ZVI is able to guarantee a 20% improvement in valve efficiency and a 25% increase in service interval with an industry leading 1 year warranty on the