Marathon Valve manufactures high pressure safety reset relief valves for installation on heavy duty mud pumps to protect the pumps against over-pressurized conditions. As the OEM for the Guardian valve line, the company ensures all specifications are met. Our valves are highly effective at holding high pressures and deliver exceptional repeatable performance. Material traceability and specialized material testing is maintained throughout the manufacturing process to meet the drilling industry's operating and safety standards. This focus on equipment safety is how Marathon Valve's Guardian valves can deliver the proven performance and reliability our customers expect. The valves underwent rigorous R&D to produce impressive results and successfully obtained multiple U.S. patents. The primary focus was engineering out all the field problems that are prevalent with other relief valves, also known as pop-off valves in the industry. Our valves have the same physical envelope to facilitate swap-outs, are simple to operate, and utilize the systems pressure to fully open when a pre-set relief pressure is reached. Marathon Valve's line of reset relief valves are the only valves on the market today with unique patented technology that is making our valves the new standard in high pressure relief valves. The Guardian 8500 PSI reset relief valve has been approved through the ABS Type Approval Program and carries the Product Design Assessment (PDA) certification. This marine type approval ensures the Guardian valves can be installed on mud pumps for drilling operations on all offshore rigs including the following: jack-up's, semi-submersible's, platform modular rigs, drill ships, mobile offshore units (MODU) or a facility classed by ABS. Designed per API 6A specifications with working pressures from 1,500 to 8,500 PSI, the Guardian safety relief valves provide consistent over-pressure protection for mud pumps operating under a variety of pressure and flow conditions.