Demanding ambient conditions are encountered in continuous casting machines in particular for rotating unions: the cooling water flowing through is of poor quality, mostly not filtered and includes particles which have an abrasive effect inside the rotating union. Furthermore, dirt of the ambient air deposits on the plant parts and is easily carried into the plant by rotating parts. Finally, there are mechanical loads acting on the system of roller and rotating union, e.g. components are not aligned perfectly. These factors limit the service life of each rotating union, thus being a wear part.
Another ‘ambient condition’ is the customer’s aim to reduce costs. That means avoiding machine downtimes and keeping maintenance costs as low as possible. Deublin company can improve these aspects, i.e. maximising the service life of a rotating union or, if repair or replacement is required, to reduce the cost for this. This is the reason why the basic concept of the series 2400 follows previous models being a rotating union installed in the shaft, the rotor guided by a long bearing bush.
Sealing is realised by using mechanically balanced seals from silicone carbide against silicone carbide. The technical structure and the combination of the mechanical seals ensure a constant torque as well as a long service life in case of poor water qualities. The series 2400 rotating union, available from Norman G Clark , combines the sophisticated technical features of the series 2000 and 4000 with the Deublin design.
The entire interior of the series 2400 has been completely optimised and enhanced. Special attention has been paid to the minimisation of sediments in the rotating union and their abrasive/corrosive effect by means of the new structure and the materials used. All components feature ‘defined flexibility’, which means that either small alignment failures as well as wear are compensated for without affecting the sealing ability.
Rotating unions are fitted with new seals, which prevent the inclusion of dirt from the environment and facilitate maintenance on the spot. Untrained personnel can carry out maintenance work in a short time. Importance has been attached to the observance of the full compatibility of the housing with the series 2000. ‘Changing costs’ by conversion to the new generation do not arise.
Deublin series 2400 rotating union is an alternative for steel works operators to change-over to the new technology for continuous casting machines and to reduce machine downtime.
Following are the operating data of Deublin series 2400 rotating unions:
- Maximum water pressure: 10 bar
- Maximum revolutions: 100/min
- Maximum temperature range: 120ºC
- Required filtration: None
- Maximum flow, (mono version) from 22 to 102 l/min
- Maximum flow, (dual version) per duct from 22 to 110 l/min