A Double mechanical seal consists of two seals arranged in a series. The inboard, or primary seal keeps the product contained within the pump housing. The outboard, or secondary seal prevents the liquid from leaking into the atmosphere.Double mechanical seal are offered in two arrangements: Back to back
A cartridge mechanical seal is a completely self-contained design requiring no assembly prior to installation. The operating position of the seal faces are preset, eliminating detailed, exacting measurements and possible damage or contamination.