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close this book A training manual in conducting a workshop in the design, construction, operation, maintenance and repair of hydrams
close this folder Session 12: Hydram selection (1½ - 3 hours)
View the document Handout 12A - Hydram comparison

Session 12: Hydram selection (1½ - 3 hours)

Time: 1½ - 3 hours


By the end of this session, trainees shall be able to:


identity factors involved in selecting hydrams;


· describe advantages and disadvantages of various ram construction, including manufactured rams;


· identify factors which will support/impede the development of a hydram system.


This session pulls together much of what has been learned to date, and organizes most of the issues to be considered in the installation of a hydram.


chalkboard or flipchart, chalk or markers Handout 12A


1. Key issues that have been raised in other sessions include:


- funding sources for projects (Sessions 9, 11)


- types of rams currently being used (Session 2)


- available materials and costs (Sessions 9, 11)


- transport available (Session 2)


- existence of local industry capable of fabricating parts or complete rams (Session 2)


2. The advantages of manufactured rams will be discussed during this session. The trainer should identity brands available in-country, collect and duplicate literature.






Identify the objectives of the session.



Ask the trainees what factors need to be considered in selecting a hydram and write these [actors on flipchart. As in handout they should include cost, serviceability. availability, simplicity of design, ease of transportation, longevity, and efficiency.



Review manufactured rams available in-country. List all the types of hydrams the trainees might have to choose from. The list may include concrete, factory made, modified pipefitting, fabricated pipefitting, and welded steel.



Ask participants to discuss each type of ram and how its characteristics lend themselves to the factors previously discussed; fill in chart.



Summarize by asking the trainees what type of hydram they will most likely be installing and any other information which is pertinent such as funding sources for hydram projects, where to buy pipe and fittings and where there might be some local industries that should be involved in the fabrication of parts or whole hydrams.



Ask participants what other factors support/impede/affect selection. List on flipchart.



Ask the trainees to form groups of six and as a group determine the ideal ram construction and configuration for their site. Instruct them to consider:


- manufactured rams available,


- limitations of component parts, manufactured or built,


- local skills available for construction, repair and maintenance,


- maintenance schedule and responsible parties,


- volume of water to the pump, and


- cost.


Allow the groups 25 minutes for this.



Design should De critiqued, according to the criteria. It all information is not available, ask participants how they would get it. Discuss the implications of craftmanship.



Ask participants it there is anything else they need to know before they begin construction. Answer any questions.