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| Mechanical |
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| 7143/7153 non-drain back valve |
This valve is intended to be used in power steering systems.
Its purpose is to allow use of the help pump when the power-driven hydraulic pumps are not operational. Able to retain all of the hydraulic fluid in the steering system, the 7143/7153 prevents fluid loss, making the helm pump fully functional.
All hydraulic valves, because of their mechanical fit, lose fluid in various amounts. This would consequently cause the hydraulic fluid to drain from the highest level to the lowest level. In most cases, the helm pump is located in the wheelhouse which is above the main hydraulic tank. The oil will eventually drain back to the main tank and leave the system dry. The 7143/7153 valve, however, will retain all of the fluid in the system and, in an emergency condition, will allow the helm pump to be used almost indefinitely. If this unit is used on a 7147 or 7148 Kobelt Power Assist Unit, it is important to have a buffer system in order to get these units to shift to manual mode.
The 7143/7153 requires a minimum working pressure of 200 PSI at all times. |
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