One of the most popular science curriculums on the market, Apologia has colorful and bright pages that kids will love. The upper grades are written in an easy to understand style, which comes in handy when learning subjects such as Chemistry or Biology. Dr. Wile (the author), takes special care in writing the curriculum for homeschooling students.
1 Tap is used in the British Isles and most of the Commonwealth for any everyday type of valve, particularly the fittings that control water supply to bathtubs and sinks.
Valve Actuator. â¢ Description: A valve actuator (See Figure 1) is a pneumatic or electric mechanism used in process control systems to automatically open or close valves. In standard valves, when the valve is given a command to open to a certain point, there is no feedback to verify that it has opened to that position. â¢ Potential Applications: Valve actuators can be used with either linear or rotary valves in industrial, medical, food and beverage, and transportation applications.