MIL-DTL-24694 Valve, Hydraulic Relief, 1.5 - 35 Bars \(22 - 500 Pounds Per Square Inch\) Cartridge Type, General Specification \(Metric\)This specification covers the requirements for cartridge-type relief valves for use in hydraulic systems with a maximum operating pressure of 35 bars [500 pounds per square inch \(lb/in2\)].