The use of advanced pipe accessories as a method of reducing water losses and improving energy efficiency

Summary

The reduction of physical water losses alongside with the improvement of water distribution energy efficiency is an important challenge both in Russia and all over the world. Described in the paper is the method of water losses reduction developed by the International Water Association (IWA) on the basis of four directions of activities, i. e. pressure control in the distribution network; leak detection and elimination; routine maintenance, repair and rehabilitation of the fittings and pipes; prompt elimination of distribution network failures. Comprehensive activities in the abovementioned fields allow reducing water losses to an economically acceptable level. Simple and efficient measures are replacement of valves and fittings as well as introduction of advanced safety valves, repair accessories and pressure control valves in the distribution network.

Key words

energy efficiency , valves , shut-off and control valves , reduction of water losses , pipeline repair , pressure control in the distribution network

The Use of Up-To-Date Pipeline Valves at Object of Municipal Enterprise Samaravodokanal

Summary

ME Samaravodokanal is one of the largest enterprises of the city, provides the population, industrial and heat and power engineering objects of the city of Samara with water supply and wastewater disposal services. The enterprise operates four complexes of pumping-filter stations of total output over 1 mil. m3/day, city treatment facilities of 1 mln. m3/day output, 182 relift pumping stations, and also1533,2 km of water supply and 1209,4 km of sewerage networks. The experience in the use of up-to-date pipeline valves at objects of ME Samaravodokanal is presented. General principles of the selection of a valve type depending on the place of application are formulated. The economic efficiency and technical advantages of adoption of up-to-date stop valves are shown.

Key words

reliability , valves , gate , rotary-butterfly valve , repairability

Electric Drives for Valves with Protection against Flooding

SUMMARY

The principally new method of the protection of electric drives for valves against flooding developed by the Scientific Production Association Siberian Machine Builder Ltd. is offered. An electric drive is placed in a hermetic caisson, height of which eliminates the contact of water with the electric drive. If adjustment or setting-up of the electric drive is necessary the caisson is quickly dismantled and after completion of works it is returned to its place. To guarantee long-term operation of the caisson it is made of corrosion-proof steel. The application of this design in sewerage shifts increases many times the reliability of a mechanism of lifting-lowering of a sliding sluice gate and more than twice reduces operation costs.

Key words

sewerage pumping station , valves , electric drive , pipeline flooding , caisson