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AT MICROFICHE REFERENCE LIBRARY A project of Volunteers in Asia by: Allen R. Inversin Published by: South Pacific Appropriate Technology Foundation P.O. Box 6937 Boroko National Capital District Papua New Guinea Paper copies are $ 3.00. Available from: Or Volunteers in Technical Assistance 1815 North Lynn St. Suite 200 c P.O. Box 12438 Arlington, VA 22209 USA in exchange for your publication from: South Pacific Appropriate Technology Foundation P.O. Box 6937 Boroko National Capital District Papua New Guinea Reproduced by permission of the South Pacific Appropriate Technology Foundation. Reproduction of this microfiche document in any form is subject to the same restrictions as those of the original document. THE CONSTFUCTION OF A HYDRAULIC RAM PUMP by A.R. INVERSIN : THE CONSTRUCTION OF A HYDRAULIC RAM PUMP A.R. Inversin TABLEOF CONTRNTS INTRODUCTION TRERYDRAULICRAMPUMP WASTE AND cmm VATJVES Materiels Required for Both Valves Tools Required Instructions - Waste Valve (making the valve seat) (fastening the valve seat to the reducer bush) (muking the valve guide) (fastening the valve guide to the-reducer bush) (drilling the valve guide) (making the valve) (bushing) (galvanized disk) (steel disk) (rubber disk) (valve assembly and adjustment) (assembling the waste valve) Instructions - Check Valve (making the valve seat) (fastening the valve seat in the nipple) (making the valve) (preparing the jig for drilling) (galvanized disk) (rubber disk) (assembly) (making the valve guide) (bushing) ‘: (valve stop) (assembling the check valve) (making the snifter valva) RAM PUMP ASSRMBLY 6 8 9 11 12 13 14 14 15 15 16 16 18 22 23 23 zr, 25 PERFOHMANCE INFORMATION Test Installation Performance Data How to Use the Graph Adjusting the Valve Stroke Effect of Other Vmiables (1) aise of air chamber (2) drive pipe diameter (3) mounting of the ram pump (4) mass of the waste valve plunger (5) use of PVC drive pip6 NOTES (1) spring loading the waste valve (2) size of the snifter valve (3) comments on the VITA (byKinde1) snd ITDG rams (a) design of the waste valve (b) design of the check valve (c) size of the air chamber (d) basic configuration of the-ram (e) waste velve adjustments (4) durability (5) modification of the snifter valve 25 26 26 28 30 30 31 31 32 33 34 34 35 35 35 35 36 36 INTRODUCTICN This technical bulletin describe8 the construction of a hydratic ram pq from cosswrcially available g&vasiaed iron pipe fittings. It also inoludes information on its performance to assist the reader in making optimum use of this pq and in estimating its performanoe at a specific site. The methods for r8m installation, operation, and trouble shooting are not included since they are no different from those covsred in most other literature on rsms. The ram described herein has been tested at drive heads of from 0.5 to 4.0 metera and can be used at still higher heads. It is capable of delivering water to heights of up to 20 time the act&L drive head Used. The amount of water required to operate the pump snd the amomt of water delivered depend on a number of factors. For delivery heads about ten times the drive head, the pump can deliver about 2.5 liters/minute (3600 litere/dsy). Under us&l. operating oonditions, the rsm would use p40 litera/ivinute though it ie possible to adjust the pump 80 that less water is ueed. 'bhder these conditions, efficiencies of 65s75% should be attainable. This efficienw is comparable to that of conanercMl. rame. The