Unlike standard sleeve fans, Orion’s sealed sleeve fans can be installed in any position and still maintain a long operating life, providing design flexibility and simplifying installation. Standard sleeve fans need to be installed in a vertical position so that gravity can lubricate the sleeve. When sleeve bearing fans are mounted in any position other than vertical, the fan’s life span can be greatly diminished. Sleeve and sealed sleeve fans are less sensitive to shock and vibration versus ball bearing fans, but more sensitive to higher temperature and higher fan speeds. Orion’s sealed sleeve fans are designed to reduce cost in those applications that require low-to-middle fan speed operation in a low-to-middle temperature environment.