Pelton centrifugal pumps.

Mode of access: Internet.

Investigation of centrifugal pumps : Part II, Experiments with a six inch horizontal centrifugal pump, comparing the efficiency of circular and spiral cases and showing the effect of air leakage

Mode of access: Internet.

Wear in centrifugal slurry pumps

The project improves understanding of wear in slurry pumps. By measuring actual pump wear and microscopically examining worn surfaces, a clearer picture emerged of wear modes and mechanisms for different materials. This enables improved guidelines for material selection and modifications to hydraulic shape that increased pump wear life.

Operator, organizational, field and depot maintenance manual : pump, centrifugal, petroleum, gasoline driven, trailer MTD, 4 in., 350 GPM, 275 ft head (Gorman-Rupp model 04A12-MVG4D), FSN 4320-691-1071.

"March 1961."

Organizational, DS, GS, and depot maintenance manual : pump, centrifugal, gasoline driven, skid mounted, 6-inch, 1120 GPM, self-priming (Carver model K906EWA), FSN 4320-968-6264.

"February 1966."

Operator, organizational, direct support, and general support maintenance manual including repair parts and special tools lists for pump, centrifugal, water, 200 gpm (Gorman-Rupp Co, model 62-1/2E13-4A084), FSN 4320-935-1618.

"June 1969."

Operator, organizational, field, and depot maintenance manual : pump, centrifugal, gasoline driven, base mtd, 2 in., 166 gpm, 25 ft head (Barnes model 10-MG) serial number 1 through 207, FSN 4320-820-0700.

Includes index.

Operator, organizational, direct and general suport, and depot maintenance manual : pump, centrifugal, gasoline engine driven, 50 GPM, 100-foot head, flammable liquid, bulk transfer (Barnes model-QM-2-28002) FSN 4320-913-7131.

Includes index.

Operator and organizational maintenance manual : pump, centrifugal, fresh water; gasoline driven, 2 wheel mounted; 4 in 500 GPM, 30 ft head, (Carver model K400S) FSN 4320-810-7311 (less engine).

Includes index.g

Organizational, direct and general support, and depot maintenance repair parts and special tools list : pump, centrifugal, GED, skid mounted, 6 in., 1120 gpm (Carver model K906MP), FSN 4320-929-0681.

"October 1968."

Operator and organizational maintenance manual : pump, centrifugal, fresh water; gasoline driven, 2 wheel mounted; 4 in 500 gpm, 30 ft head, (Carver model K400S) FSN 4320-810-7311 (less engine).

"March 1961."

Operator, organizational, field, and depot maintenance manual : pump, centrifugal, fresh water, gasoline driven, base mounted, 4 in, 200 gpm, 300 ft head (Carver model 4WHIS), serial number range 37715RF through 37814RF, FSN 4320-810-7310 ....

"September 1961."

The 3 Technologies

The technology scene in India is at one and the same time promising, frustrating and fascinating. Three broad areas in technology development can be distinguished. The first is relatively small scale; it is typified by the absorption of products of the industrial revolution into the repertoire of the Indian artisan and craftsman, examples being diesel engines from Kolhapur and centrifugal pumps from Coimbatore. The second class is essentially 'state technology', developed at public expense by national commissions: agriculture, atomic energy and space are examples. There is a vast third area in both private and public sector, covering products for the urban consumer and the state (e.g. r defence); this area has largely remained colonial. The factors affecting the three areas of technology are described and analysed from the point of view of an Indian scientistengineer; and it is concluded that the enormous potential of the country's human and mat.erial resources is not only unrealized, but even unrecognized as yet.

A quasi-steady performance prediction model for dynamic characteristics of a volute pump

A performance prediction model generally applicable for volute-type centrifugal pumps has been extended to predict the dynamic characteristics of a pump during its normal starting and stopping periods. Experiments have been conducted on a volute pump with different valve openings to study the dynamic behaviour of the pump during normal start-up and stopping, when a small length of discharge pipeline is connected to the discharge flange of the pump. Such experiments have also been conducted when the test pump was part of a hydraulic system, an experimental rig, where it is pumping against three similar pumps, known as supply pumps, connected in series, with the supply pumps kept idle or running. Instantaneous rotational speed, flowrate, and delivery and suction pressures of the pump were recorded and it was observed in all the tested cases that the change of pump behaviour during the transient period was quasi-steady, which validates the quasi-steady approach presented in this paper. The nature of variation of parameters during the transients has been discussed. The model-predicted dynamic head-capacity curves agree well with the experimental data for almost all the tested cases.