English English.   Español  Español.

The application of Appropriate Technology

Articles for Keyword "water pumps"

Centrifugal Pump Selection and Installation

Posted on Oct 25, 2011

Factsheet by the British Colombia Ministry of Agriculture, Food and Fisheries on the correct selection and installation of centrifugal pumps. Efficient operation of a pump can only be obtained by selecting the correct pump, as well as the proper selection and installation of suction and discharge fittings. The pump should be evaluated on a regular basis to ensure the pump is operating properly and is still sized correctly for the system, especially after any major system modifications. The most commonly used pumps in irrigation are centrifugal pumps, turbine and submersible pumps. Centrifugal pumps are a good choice to pump water from lakes, rivers, creeks or shallow wells. Horizontal centrifugal pumps commonly used for irrigation systems have total dynamic heads of less than 400 ft and suction lifts of less than 20 ft. This factsheet focuses on centrifugal pumps. Turbine and submersible pumps are used when pumping from wells with a static water level below 15 ft. Turbines are often used for total dynamic heads exceeding 450 ft. Submersibles are available up to 10 inch in diameter and motor sizes up to 100 hp. Read the while document as a PDF file (100...

Read More

Fluid Mechanics For Gravity – Flow Water Systems and Pumps

Posted on Jun 5, 2011

A text detailing the design of water systems including the design parameters recommended for a successful and long lasting water supply. Issue 2 May 2003.

Read More

Photovoltaic Water Pumps

Posted on Oct 25, 2011

Short technical brief by the GTZ on photovoltaic pumping systems. In many developing countries, the inadequate supply of drinking and irrigation water is a severe problem. In rural areas with no access to grid power, national water authorities and private farmers have to rely on hand pumps and diesel-driven pumps, many of which are out of service due to technical defects or a lack of fuel. As a rule, hand-operated pumps are the least-cost option for low consumption rates and low pumping heads. If hand pumps cannot satisfy the demand, diesel driven pumps are commonly used for drinking and irrigation water supply. These pumps stand in competition with photovoltaic water pumps (PVP), which present themselves as a reliable and environmentally-sound alternative means of water delivery. Read the whole of this document as a PDF file (144...

Read More

Pump Calculator Spreadsheet

Posted on Oct 25, 2011

This spreadsheet allows the user to find the pump power requirement (Watts or Brake Horse Power) for various feeder pipe diameters (in) and given a known flow rate (LPS), pipe length (m) and head (m) and then select a suitable pump based upon available pump characteristic data. Microsoft Excel (192KB)

Read More

Rope Pump Manual, Hand Dug Well & Borehole model

Posted on Oct 25, 2011

A good manual by the Practica Foundation on rope pumps for hand dug wells and boreholes. This manual is made as a guide for organizations and workshops which are involved in the introduction process of the manually operated Rope pump and for technicians to be trained in Production, Installation and Operation & Maintenance of the Rope pump models: ‘Hand dug well’ (AH) and ‘Borehole’ (AB). Experiences indicate that for a successful introduction, production and installation of Rope pumps on a large scale, the use of any production and installation manual has to be combined with hands-on training by an experienced trainer! The trainer will guide the organization and/or workshops through all aspects of the introduction and production process. Lessons learned from the past show that a number of small mistakes usually are made during the first years of production. However, these minor ‘mistakes’ can have a large influence on the life time and functioning of the pump. If these impurities are not corrected in time by a professional, the Rope pump option will gain a negative image amongst users and others in an almost irreversible way! It is therefore that it is strongly suggested this manual will only be used in combination with a professional training, whereby the manual will be distributed to the participants, who can later use it as a reference handbook. The practical training will focus on all essential aspects for producing and introducing the Rope pump. You can read the whole of this document as a PDF file (2.4...

Read More

Rural Water Supply Technology Options: Handpumps, Mechanised Pumps and Surface Water

Posted on Oct 25, 2011

Booklet by SKAT with information on hand pumps, mechanised pumps and rainwater and surface water Collection. This document contains details of reciprocating handpumps, rotary handpumps and displacement handpumps as well as a section on motorised pumps. You can read the whole of this document as a PDF file (8.5 mb)

Read More

Small Community Water Supplies

Posted on Oct 24, 2011

This book is a very good place to start learning about building a water supply. It covers all the things that you will need to know about sourcing water including rain water harvesting, spring, wells and surface water. It also has sections on water quality and treatment. This book is made available here as PDF files. View or download the whole book in one file ( 9.8mb PDF file) 0r view the book chapter by chapter: Chapter 1: Introduction (92kb PDF file) Chapter 2: Planning and Management (124kb PDF file) Chapter 3: Small community water services in Central and Eastern European Countries – situation, challenges, needs and developments (100kb PDF file) Chapter 4: Water quality and quantity (112kb PDF file) Chapter 5: Integrated Water Resources Management (128kb PDF file) Chapter 6: Artificial recharge (636kb PDF file) Chapter 7: Rainwater harvesting (460kb PDF file) Chapter 8: Spring water tapping (1mb PDF file) Chapter 9: Pumping (500kb PDF file) Chapter 10: Groundwater withdrawal (1.7mb PDF file) Chapter 11: Surface water intake and small dams (772kb PDF file) Chapter 12: Water treatment (244kb PDF file) Chapter 13: Aeration (168kb PDF file) Chapter 14: Coagulation and flocculation (296kb PDF file) Chapter 15: Sedimentation (212kb PDF file) Chapter 16: Multi-stage filtration technology (688kb PDF file) Chapter 17: Rapid filtration (2.2mb PDF file) Chapter 18: Desalination technology (412kb PDF file) Chapter 19: Disinfection (292kb PDF file) Chapter 20: Water transmission (888kb PDF file) Chapter 21: Water distribution (1.3mb PDF file) Chapter 22: Technologies for fluoride removal (1.1mb PDF file) Chapter 23: Technologies for arsenic removal from groundwater (336kb PDF file) Chapter 24: Water supply in disasters and emergencies (1mb PDF...

Read More

Solar Pump Calculation Sheet

Posted on Oct 25, 2011

PDF calculation sheet for designing solar pumping systems. Download this sheet as a PDF file (92 kb)

Read More