1. There are also throttle valves under the control of the driver. 2. This means that a mixture of gas and liquid leaves the throttling valve . 3. The inlet had a secondary throttle valve sandwiched underneath the primary throttle body. 4. Speed was controlled by means of a throttle valve lever. 5. The pilot valve is always larger in flowrate than the filling through the throttle valve . 6. This required the use of a throttle valve in the steam supply, controlled by the governor. 7. The N360 / N600 controlled gear changes by balancing a throttle valve and a centrifugal valve. 8. Usually, the throttle valve is controlled with a throttle pedal or lever via a direct mechanical linkage. 9. This could be obtained at a throttle valve located downstream of the evaporator section of the boiler. 10. The rear pump pressures were modified by a throttle valve , and transmission is applied to ensure positive engagement.