DEUBLIN offers five different seal technologies, in order to provide the best solution for every machining application. Only DEUBLIN can offer such flexibility to the device tool designer.

Closed Seal: As the name indicates, the professional seals stay closed with or without coolant pressure. Unions with closed seals have only minimal “weeping” of media to allow lubrication of the seal faces. Therefore, drain lines generally are not required. Closed seal unions generally are less affected by extremely contaminated coolant than other designs. However, closed seal unions should not be rotated for an extended time if coolant fluid is not present.

Controlled Leakage: The opposite of closed seals, controlled leakage seals always have a small gap between the seals, even when pressure is applied. For this reason, controlled leakage unions are excellent for high-speed applications with pressurised dry air. Controlled leakage unions generally are not suitable for coolant fluid applications...