Do Natural Killer Cells Secrete Antibodies at Erin Wright blog Hand written letter n logo hi res stock photography and images Alamy Natural Killer Cells: A Promising Kit in the Adoptive Cell Therapy Toolbox NK Logo Design. Non self priming, single stage, centrifugal pump designed according to ISO 5199 with dimensions and rated performance according to EN 733. Flanges are PN 16 with dimensions according to EN 1092 2. The pump has an axial suction port, a radial discharge port and horizontal shaft. It is of the back pull out design enabling removal of the motor, coupling, bearing bracket and impeller without disturbing the pump housing or pipework. The unbalanced rubber bellows seal is according to DIN EN 12756.