THE AFRIDEV HANDPUMP

The Afridev reciprocating type hand pump has been specially designed by SKAT -HTN (Swiss Centre for Development Cooperation in Technology and Management) to meet the requirements for Village Level Operation and Maintenance (VL OM) as specified by the UNDP/World Bank. The pump has undergone extensive laboratory and field development tests and is one of only two designs which fulfills all aspects of the UNDP/World Bank specification at depths between 0 and 45m. Particular features are:

· Up to 1300 litres/hour output at pumping lifts up to 45m.

· Heavy duty design suitable for continuous operation over long periods.

· Rugged all galvanized steel construction for corrosion resistance and long life.

· Simple to install, operate and maintain at the village level.

· Designed for ease of maintenance with basic tools and cheap, readily available spare parts.

Water supply from an Afridev pump

Though the Afridev design is widely manufactured throughout the world, quality of the product itself is determined by that of the manufacturing process. The DAYLIFF Afridev is manufactured to exacting standards in a fully equipped ISO 9000:2000 certified factory with cumulative production experience of hundreds of thousands of units. The combination of this highest level of manufacturing quality , a tried and tested design and Davis & Shirtliff ’s service commitment result in a rugged and dependable product ideal for all hand powered groundwater pumping applications.

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INTELLIGENT WATER SUPPLY

Variable Speed control is a widely used technology for pump control and works by varying the pump speed to provide system water output at a constant pressure. This provides the following benefits:

· Constant pressure providing consistent, even supply to the consumer.

· large energy cost savings as systems are always operating at peak efficiency for the demand conditions.

· Extended pump life due to reduced electrical and mechanical operating loads.

· Silent operation with no pressure shocks.

· Simplified installation due to compact dimensions and integral pump control – no separate panel is required.

Principle system components include the controller , which for larger systems is mounted on top of the pump motor to provide cooling while smaller units are mounted in line on the pump outlet, a quality Grundfos pump, a pressure sensor and a small surge tank to smooth the operating cycle. Controllers offer the following features:-

· Varies pump speed to maintain pre-set system pressure.

· Over voltage, under voltage, single phasing and electrical overload protection.

· Dry run protection with auto restart.

· Integral soft start/soft stop function which extends pump life, reduces system pressure loads and reduces mains power loadings on start up.

· A digital display that indicates input current, supply voltage, hours run and various operating and alarm conditions.

· One controller can control additional pumps and multiple controller systems can be synchronized for sequenced pump operation.

· Balanced pump operation ensuring equalized operating periods for each system pump.

All Dayliff booster sets use the latest technology controllers coupled to quality Grundfos pumps and are supplied complete frame mounted with inlet and outlet manifolds and valves for simple installation. Nominal system sizes are 2.5, 4 and 6 Bar , though pressures can be set to suit site conditions and the option of two and three pump configurations are available. Three pump systems can be specified with three controllers or two controllers/1 DOL start unit. In all systems pump operation is sequenced with the number of pumps operating increasing with system demand.

Variable speed drive is now accepted as the most efficient way to provide on-demand water supply in all sorts of industrial, commercial and domestic applications. Dayliff booster sets are the ideal solution in the application of this efficient technology.

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THE JKIA FIRE TRAGEDY & THE CONVINIENCE OF DAYLIFF FIRE SETS

In the wake of what happened recently at the Jomo Kenyatta International airport it is not prudent to risk not having a fire fighting installation that can save you colossal amounts of money in the event of a fire outbreak. This is what initiates our discussion on the DAYLIFF fire sets.

A Davis & Shirtliff Firefighting installation in progress

DAYLIFF FLA packaged Fire Sets are specially designed to provide automatic supply to multiple hose reel or sprinkler outlets for firefighting installations. Standard sets combine parallel duty diesel and electric powered supply pumps to ensure serviceability in all conditions as well as a jockey pump to maintain system pressure. Particular features include:-

· Individual electric motor and Lister diesel engine powered Ajax pump sets providing standby supply in the event of electrical power failure.

· separate automatic jockey pump to maintain system pressure and regulate main pump operation

· Bellows type pressure switch controlled operation providing progressive jockey pump, electric pump and diesel pump starting at reducing cut-in pressure

· Low maintenance diaphragm type pressure vessel to regulate pump cycling.

· Integral control panel providing automatic parallel operation of the supply pumps and incorporating electrical protection and a DC battery charging system

· Compact frame mounted design incorporating necessary valves and piping for simple site installation.

Systems are designed to give their rated output at 5 Bar and three standard sizes are available, 40, 60 3 and 100 m /hr. with the two pump sets operating in parallel, 50% standby output being provided in the event of electrical failure. For particular applications special designs incorporating different equipment arrangements and specifications are available.

For all firefighting applications high levels of equipment performance and dependability are vitally important for the protection of both lives and property . Dayliff FLA Fire Sets combine quality components, all carefully matched for optimal operational efficiency with Davis and Shirtliff’s unmatched pumping expertise and competitive pricing to provide effective, reliable and easy to install firefighting solutions.

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