Marathon Valve is a leading manufacturer of high-pressure safety reset relief valves that deliver consistent performance and an overall improvement to drilling operations. As the Original Equipment Manufacturer (OEM), Marathon Valve’s Guardian® reset relief valves are manufactured in accordance with international standards and have industry recognized certifications. Marathon Valve’s Guardian® reset relief valves are the only valves available with patented designs to handle not only the high operating pressures of today’s deeper drilling but also enhancing the service life of the valves against the corrosion factors associated with drilling muds. The ease of operation, in-line maintenance, and premium materials used throughout the valves allow the Guardian® valve line to perform accurately, consistently, and within extremely tight tolerances. The multiple relief pressure settings give operators options; the valves will fully open and discharge to relieve pressure and can be quickly reset to achieve optimum performance in the drilling environment. The company’s objective is to provide high quality, low maintenance safety valves for installations on mud pumps.