7.Сопоставьте части предложений. Переведите предложения письменно.

1. Valves are critical in optimizing efficiency, 2. Actuators regulate mass and energy flows 3. The signal is converted into a motion 4. The air pressure acts as a piston to create linear force Once calibrated, the electric control valve actuator

a. so that the control element of the actuating element assumes a corresponding position. b. to close and open the valve. c. and they are often the final control element in the operation of a power plant. d. can operate for months without adjustment. by adjusting valves, flaps and cocks.

8.Прочитайте текст и ответьте письменно на вопросы.

1. Why are valves crucially important in the work of every modern power plant?

2. What is the principle of work of an actuator in a control valve?

3. What are the three common types of actuators?

4. What are the main advantages of electric actuators?

5. Why are the valves produced by Young & Franklin guarantee reliable work in the power plant?

9. Заполните пропуски данными словами (perform, valve body, actuators, pollution control, pneumatic, performance, control systems, power failure). Переведите предложения.

1. Valves, in conjunction with a controlling actuator, are used for a)………….., feed water, cooling water, chemical treatment, bottom ash and steam turbine b)…………....

2. Actuators c)…………. different motion sequences, including linear, pivoting and rotating motions, and they are powered by d)…………., hydraulic or electrical energy.

3. The benefits of e)………… powered by an electric motor include better efficiency, less maintenance and enhanced f)………..of the control valves.

4. The g)…………… is coupled to an actuator assembly that contains a fail-safe spring to quickly close the valve, halting fuel flow in the event of a h)………… or turbine trip condition.

10.Переведите текст письменно и приготовьтесь к контролю чтения абзацев № 1,2.

11.Составьте письменное реферирование текста. Вариант 4

1. Перепишите предложения и определите функцию глагола to have, to be. Переведите предложения.

1. Valves and actuators are critical in almost every aspect of power plant operations.

2. Although the basic technology for most valves and actuators has remained the same, innovative applications and design modifications for problem solving have led to notable improvements in actuator technology.

3. Until 20 years ago motor operated valves tended to have motor control centers remote from the valve.

4. The more recent smart actuators have an internal data logger inside which has had the ability to monitor torque output.

5. When valves leak, they are acting in direct opposition to the forces that drive the plant by allowing energy to leave the high energy processes and enter the low.

2. Выберите требуемую форму глагола и переведите предложения.

1. Actuators perform different motion sequences, (including, included, to include) linear and (rotated, rotating) motions.

2. If actuators (haven’t received, hadn’t received, wouldn’t receive) a control signal from automation systems, they (wouldn’t have converted, wouldn’t convert) it into a motion.

3. If the valve (leaked, would leak), it (acted, would act) in direct opposition to the forces that drive the plant by allowing energy to leave the high energy processes and enter the low.

4. Miscellaneous trip alarms are also included (monitoring, to monitor) things like starts per hour (insuring, to insure) that the internal contactors are not being overused.