MIL-DTL-5498 Accumulators, Hydraulic, Cylindrical 3000 Psi, AircraftThis specification covers hydraulic accumulators having a single-shell design with a piston type separator for use in aircraft hydraulic systems at rated pressures ranging to 3,000 pounds per square inch \(psi\) between the temperature range of -65 Degrees F to 275 Degrees F.