Aerospace Reservoirs

Bootstrap reservoirs are used in hydraulic systems to ensure a consistent supply of hydraulic fluid to the pump suction under all operating conditions. These reservoirs can vary from simple open tanks to pressurized vessels with multiple pressurization methods. Bootstrap or self-pressurizing reservoirs provide “airless” fluid by isolating the oil from the environment and sealing the hydraulic system. They offer flexibility in placement and orientation, making them suitable for aircraft and capable of accommodating various loads and forces. Additionally, they maintain constant pump boost pressure regardless of fill level or volume. It is common to enhance pressurized reservoirs with additional features, such as an integral relief valve that can also function as a bleeder. Incorporating extra system components into the reservoir assembly can improve efficiency and reliability, making modularization a popular practice. Over the sixty-plus years since its establishment, Arkwin Industries has become a leading designer of such modularized packages integrated into reservoir assemblies.

Arkwin’s reservoirs have been designed to many stringent customer specifications. Designs utilize petroleum based oils, phosphate esters, jet fuels, and silicone fluid as working media. Production designs have swept volumes from 5 to 5,000 cubic inches and operating pressures up to 5,000 psig. Usage spans from the A-10 to the Embraer E-2 and many aircraft in between including CH-47, The Space Shuttle, F-35 and more.