| 摘要 |
The invention provides a system for dispensing a fluid from a source to at least one delivery station. The system selectively establishes a fluid flow in a first flow direction or a second flow direction and comprises a first supply line having a first first end and a second first end, the first first end being coupled with the source of the fluid. The system further comprises a second supply line having a second first end and a second second end, the at least one delivery station being coupled to the second supply line between the second first end and the second second end. The system further comprises a return line having a third first end and a third second end, the third first end being coupled to the source of the fluid. The system still further comprises a reversing valve for selectively establishing fluid flow in the first flow direction or the second flow direction. The reversing valve couples either the first second end or the third second end to the second first end and the other of the first second end and the third second end to the second second end. The system still further comprises a control valve responsive to the fluid flow for selectively establishing fluid communication between the second supply line and one of the delivery stations. |
