Network protection device for a gas or fluid supply network to which a large number of consumers is connected, where the network protection device is located in the connecting pipeline between the supply network and the individual consumer

摘要

A chemical installation feeds e.g. ammonia, nitrogen or hydrogen to multiple user points, each user point being linked to the main network by a rotary valve fabricated in the form of a ball tap with a plug located in a passage. The passage has an air bleed hole that is only exposed when the valve is shut.