ÖNORM EN 15355

This document applies to distributor valves assessed according to TSI Specifications as interoperability components for air brakes of interoperable railway vehicles which are operated by compressed air. The distributor valves contained in this document are of graduated release type. Direct release types are not included. Functionally they are regarded as not containing relay valves of any type, even if the relay valves may be physically an integral part of the distributor valves. This document gives the requirements for the design, dimensions, testing and quality assurance of distributor valves. These requirements can not be written in sufficient detail to ensure good workmanship of proper construction. Each manufacturer is therefore responsible for taking every necessary step to make sure that the quality of workmanship and construction is such as to ensure accordance with good engineering practice.