Hydraulic Elevators Their Design Construction Operation Care And Management
The book Hydraulic Elevators Their Design Construction Operation Care And Management was written by author William Baxter Here you can read free online of Hydraulic Elevators Their Design Construction Operation Care And Management book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Hydraulic Elevators Their Design Construction Operation Care And Management a good or bad book?
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If it is desired to run the car down, the valve D is closed and the valve A is opened; then the water - FIG. 197 FIG. 198 from the lifting-cylinder pipe will escape into the discharge pipe and through it to the pressure tank. The car can also be run down by open- ing the valve B with A either open or closed ; the speed will be greater if B is opened. It is not actually necessary to close the valve D in coming down. From the foregoing it will be noticed that when the safe pump is used to lift an... extra heavy load, the main operating valve is not used ; in fact it is cut out of service by the closing of the valve C, and the move- ment of the car is controlled entirely by the hand valves A, B and D. While the diagram, Fig. 196, shows very well the general arrange- ment of the high-pressure system with only one elevator, it leaves con- siderable to the imagination when one considers an extensive plant con- taining a large number of elevators and a corresponding number of pumps and accumulators.
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