Trident Emergency Products’ AirMax Intake Relief Valve is an air-operated, remote-controlled intake relief valve design with panel control adjustment from 50 to 300 PSI. Competitive remote-controlled relief valves use water pressure to operate, requiring water-filled control lines, debris strainers, needle valves, etc. that are subject to maintenance, freezing and labor-intensive installation. Preset relief valves depend on a mechanical spring that produces an increasing force as it opens, resulting in a low relief water flow and more pressure rise. Preset relief valves are usually located in the pump compartment and adjustments can only be made by crawling under the truck. A single AirMax panel control can remotely control all the intake relief valves on the apparatus, saving valuable panel space and providing simplified operation. AirMax is self-draining, and its brass/stainless steel construction provides complete corrosion resistance. Product includes: valve body, adjusting air regulator, nameplate, and gauge indicator for set pressure. For more information go to https://tridentdirect.com/airmax-relief-valve