PLC/DCS redundant system PFTL201C 20KN

PLC/DCS redundant system PFTL201C 20KN

PLC/DCS redundant system PFTL201C 20KN

Following benefits can potentially be achieved when using the ABB solution with linear bearing in furnace installations:

• The combination of ABB Large PillowBlock load cells and Linear Bearing is proven to be very reliable with long-term stable tension measurement.

• The Linear Bearing solution is insensitive to and unaffected by temperature variations.

• The ABB load cells are virtually maintenace-free and the Linear Bearings require a minimum of service. ABB recommends considering the following issues in order to achieve best possible measurement performance in the furnace sections:

• Protection bellows around deflector roll shafts between furnace and bearing housings must be flexible to avoid axial forces caused by thermal expansions

• In order to reduce the load cell temperature variations, heat radiation shields may be fitted between load cells and furnace

• Deflector roll elongation must be accommodated by the free side bearing.

The measurement influence can be minimized in two ways.

1. Clearance between roll bearings and bearing housings on the free side bearing, as well as lubrication must be designed for actual operating conditions.

2. ABB’s proven solution with linear bearing on the free side of the roll can be utilized to accommodate the roll elongation.