O-Ring Seal Prevents Leak Back Out Of Filter

Tempest, which since March of 2005 has offered secondary magnet filtration to capture fine ferrous particles -- thus reducing metal-on-metal contact within the engine -- in its "Original" line of oil filters, announced Monday another "first" in oil filter design. The company's oil filters for TCM engines that use the ADB (anti-drain back) valve now also include a new, more positive oil seal.

Although all manufacturers of aviation oil filters include an ADB valve, Tempest has improved the design by using an o-ring seal (below). The typical design uses welds between the base plate and the seal retaining plate.

"We have found the typical weld design allows oil to leak back out of the filter, defeating the purpose of the ADB valve. We have incorporated an o-ring seal design that assures oil retention in the filter" stated Tempest’s John Herman.

Tempest part numbers AA48108 and AA48109 are used on TCM engines, which require the ADB valve for the purpose of retaining oil in the filter. Because of the mounting position of the filter, the ADB valve assures oil in the filter when the engine is started, thus preventing engine oil starvation during the critical starting period.

FMI: www.tempestplus.com