DIN 1988-500:2010-10

This standard deals with planning and design principles for pressure boosting stations equipped with pumps with constant rotational speed. This operational mode can lead to pressure variations and often requires membrane pressure vessels on the supply pressure side and end pressure side, which in turn may cause hygienic impairments of the drinking water quality. The planning and design principles in this standard allow for the implementation of the increased requirements for comfort, hygiene and energy efficiency. With this modern system concept it is usually possible that membrane pressure vessels can be omitted and that a constant pressure can be maintained within the range. The explanation of the terminology and the basis for planning (amongst others supply pressure, increase in pressure, supply security, conveying stream and pressure, pressure zones, types of connections) are followed by a description of installation parts (for instance, pressure measurements, pressure control, fittings, safety devices) and of the composition, connections and installation of pressure boosting stations with RPM-regulated pumps. Subsequently, requirements for the readiness for operation to be ensured (meeting the connection conditions, report by the client, for instance to the water supply company) are specified. These stations are subject to inspection and maintenance and the manufacturer's maintenance instructions. Reference is made to specific inspection and maintenance measures. The standard will be included into the Technische Regeln für Trinkwasserinstallationen (TRW) (Codes of practice for drinking water installations), which consist of European standards and national supplementary provisions. The standard has been prepared by Working Committee NA 119-04-07 AA "Häusliche Wasserversorgung" ("Domestic water supply") at NAW.