| 21. | An oil-based steering damper and check valve were added.
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| 22. | The biggest change involved the addition of check valves between the fuel and oxidizer lines.
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| 23. | Multiple check valves can be connected in series.
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| 24. | The bodies ( external shells ) of most check valves are made of plastic or metal.
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| 25. | The inlet check valves also had significant damage.
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| 26. | A check valve at the supply end prevents any fuel entering while the bubbles are growing.
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| 27. | Next install the check valve on the riser.
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| 28. | Larger check valves may be installed with ball valves at the ends, for isolation and testing.
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| 29. | Tarlov cysts often enlarge over time, especially if the sac has a check valve type opening.
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| 30. | When the plunger moves forward, it pushes the oil through a discharge check valve into the cylinder.
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