ABB's Measurement and Analytics portfolio applications

‍The following pages show some of the ways in which ABB valve automation products bring benefits in different applications

Electric actuators

Maintenance-free operation for the longest time

In boiler applications, superheaters are widely used to help increase steam temperature.

Shower water valves control the supply of cooling water that is injected into the superheated steam in the superheater and reheater.

Tight control of the cooling water supply helps to achieve optimum steam temperatures both inside and at the output of the superheater.

The Challenge - Accurately Controlling the Mass Flow of Cooling Water

To minimize the cooling of steam in the process while achieving the maximum allowable steam temperature

Continuous, precise control of the mass flow rate of cooling water injected into the superheater and reheater is required.

This requires continuous and precise control of the mass flow rate of cooling water injected into the superheater and reheater. 

Too much water injection will result in subcooling of the steam and reduce boiler efficiency.

Too little water injection can result in excessive steam temperatures and pressures,

risking damage to the superheater, turbine and downstream components.

To correct for small changes in temperature, small changes in water volume

must also be realized in the reverse adjustment of the valve.

The same must be true in the disproportionate zone of the valve.

Any equipment used must be able to withstand the harsh operating environment

and high ambient temperatures associated with superheater applications.

Solutions - Highly accurate continuous positioning of sprinkler valves

ABB's Contrac continuous electric linear actuator provides the ideal solution for sprinkler valve control applications.

The ideal solution for valve control applications.

Even at ambient temperatures up to 85 °C (185 °F) according to IEC 60034-1.

The Contrac actuator is fully S9-100%ED operable even at ambient temperatures up to 85 °C (185 °F),

allowing for highly accurate continuous positioning of water spray valves.

The Contrac actuator utilizes oil lubricated spur gears and the drive shaft is supported by ball bearings.

Rotary motion is converted to linear motion in the linear actuator by means of a highly efficient ball screw spindle.

The Contrac actuator is wear-free, with a deadband of only ± 0.5 mm.

With a deadband of only ± 0.05%, 

the Contrac actuator provides highly accurate positioning for all types of valves. 

With its rugged design and IP66/NEMA 4X rating, 

the Contrac actuator can withstand even the most extreme conditions.

With its rugged design and IP66/NEMA 4X protection rating, 

the Contrac actuator can withstand even the harshest operating conditions.