| 1. | Pilot valves are valves which are used to control other valves.
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| 2. | The pilot valve is always larger in flowrate than the filling through the throttle valve.
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| 3. | The pressure from the pilot tube to the dome is routed through the actual control pilot valve.
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| 4. | Pilot valves in the actuator lines control the supply of air or liquid going to the actuators.
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| 5. | If the pilot valve is opened, water drains from the upper chamber and its pressure is reduced.
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| 6. | The difference between PORV and conventional PRV is that pilot valves use system pressure to seal the valve.
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| 7. | Both fuel and oxidiser first flowed through a small pilot valve for ignition, before their main valves opened.
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| 8. | The pilot valve gives a proportional control over main valve flowrate, with the opening being controlled, slow and gradual.
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| 9. | This pilot valve is controlled mechanically from outside the valve chamber and is the main control over the valve position.
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| 10. | Pilot valves are often used in critical applications ( i . e ., emergency and safety controls ) and are human-operated.
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