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Zahroof Valves, Inc. is a manufacturer of valves for use in reciprocating gas compressors. It is headquartered in Houston, Texas, United States. Their reed valve system is regarded as a fundemental change in a 200 year old design.

History
Zahroof Valves Inc. (“ZVI”) is a privately owned Texas Corporation founded by Zahroof Mohamed in 2010. ZVI was formed to develop the Modular Reed Valve technology developed by Zahroof Corp. in the application of valves assemblies for reciprocating gas compressors. The operations of the company was started in the garage of Zahroof and the first prototype valves for testing in the compressor stations were machined and assembled there. In September 2011, the company moved to a 2000 sq ft facility.

In 2011 and 2012 prototypes of the valve were tested in two different compressor stations validating the technology. Based on extensive testing of the valves, design parameters were developed to apply this technology in different gas compression applications using a Dynamic Valve Analysis and Cylinder Simulation program developed by Zahroof Corp. In 2013, the first production pilot valves were tested in gas gathering applications in two different locations in Texas.

Since March of 2014, production valves have been installed in various applications in different parts of the US, Canada and South America as drop in valve replacements for all the major compressor brands including Ariel, Dresser-Rand, Superior, Gemini, CIP. In 2014 the company moved to its current facility. NGP Energy Technology Partners, a private equity firm, invested in the company in July 2013 and December 2014.

Products
Zahroof Valves, Inc. designs, manufactures and services valves for use in reciprocating gas compressors under the brand name straightflo valve (SFV). The straightflo valve is a reed valve that uses Modular Reed Valve technology. The patented straightflo valve is a drop in replacement valve for industrial reciprocating compressors for speeds from 350 rpm to over 3600 rpm, pressure differential to 5000 psi (345 bar), continuous working temperatures from -40 F (-40 C) to over 550 F (288 C) and for all gases including highly corrosive gases and gases with high H2S content.

They also design, manufactures and service the ZVI unloader valve, a piston-style unloader, as a drop in replacement for finger style or plug style valves, or as a complete package including the valve actuator. In 2013, they introduced the concentric valve using its standard modules as well as other configurations incorporating a suction and discharge valve in a single structure. In 2016, they introduced axial-radial valves using its standard modules to increase the valve effective area beyond the capabilities of a flat valve. The company also designs and manufactures its valves with integral or removable cages.

Research
The Modular Reed Valve was used in a study by Oregon State University on selectively repurposing one cylinder of an automobile engine running on compressed natural gas (CNG) to be used as a compressor. The ARPA-E MOVE project was headed by Dr. Christopher Hagen and published in ‘Design and Analysis of a Self-Refueling CNG Vehicle to Provide Home Refueling’.

The Modular Reed Valve technology is also being used by HICOR Technologies, since its prototype phase in 2010, in the development of its rotary isothermal compressor.