| 1. | Next, the needle valve is opened and the balloon begins to inflate.
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| 2. | A needle valve or solenoid valve regulates the CO 2 bubble rate.
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| 3. | The highly pressurized sample is then squeezed past a needle valve.
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| 4. | Accurate flow control with a needle valve relies on a constant inlet pressure.
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| 5. | The flow is controlled by a Larner Johnson needle valve.
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| 6. | The valve is often described as a needle valve, although this is a misnomer.
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| 7. | They read back pressure, and take into account resistance changes downstream from the needle valve.
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| 8. | Mixer operation is simple, it contains only one moving part, that being the needle valve.
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| 9. | The flow rate is then adjusted by the operator using needle valves on the torch.
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| 10. | The boost control solenoid contains a needle valve that can open and close very fast.
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