The unbalanced rubber bellows seal is according to DIN EN 12756

liquid-lubricated bearings and pressure equalizing diaphragm

multistage

Operation modes and functions:

cm 1 3 a r g v aqqv f a a n 97516673 The unbalanced rubber bellows sealCompact, reliable, horizontal, multistage, end suction centrifugal pump with axial suction port and radial discharge port. Pump materials in contact with the liquid are in high grade stainless steel. The mechanical shaft seal is a special designed, unbalanced O ring seal. Pipework connection is via internal Whitworth pipe threads, Rp (ISO 7 1). The pump is fitted with a 3 phase, foot mounted, fan cooled asynchronous motor.