21. The lower gages had horizontal butterfly valves in size which were used for emptying the lock chamber. 22. The throttle is typically a butterfly valve . 23. The butterfly valve is simply a circular disc fitted on a spindle, fitting inside the pipe work. 24. Each bar is paired with a resonator tube that has a motor-driven butterfly valve at its upper end. 25. Because the engines do not need to control air volumes, they lack a butterfly valve in the intake tract. 26. These engines had both side-and peripheral-located intake ports switched with a butterfly valve for low-and high-RPM use ( respectively) 27. Unlike the petrol engine, diesels lack a butterfly valve ( throttle ) in the inlet system, which closes at idle. 28. In 1957, the Spanish company started producing gate valves, check valves, needle valves and butterfly valves for the marine industry. 29. Icing may also cause jamming of the mechanical parts of the carburetor, such as the throttle, typically a butterfly valve . 30. No . 2004 was fitted with an experimental butterfly valve blastpipe bypass, manually activated to prevent fire-lifting at high cutoffs.
