When taking notes, do not copy word for word, that is plagiarism! You will not get credit for doing that. use a maximum of three to five words and document the web address and page number. If you are using a book, document the title, author, and page number. 3. Write your rough draft.
Closing the main valve (Shut-off/Turn-off) A.) Round âwheelâ handle valves will turn-off by turning the handle to the right (clockwise). It may take 2 or more full revolutions. B.) Slowly turn level handle valves Â¼ turn, until the handle it not parallel with the pipe.
Shutoff head is the head a pump will develop when operating against a closed discharge valve. The point where the left side a pump performance curve intersects with the Y-axis is the shutoff condition. The head corresponding to that point will be produced when the pump is producing no flow. If a pump operates in a system that requires pressure equal or greater to the pump's shutoff head to generate flow, the pump will fail to produce any flow. The terms dead-heading and zero flow are sometimes used interchangeably with the term shutoff.