Four circuit air brake control valve - has central bore with angled bores to valve elements

摘要

A four circuit air brake control valve has a central bore (2) through the main housing, from which angled ducts (12,13,14,15) lead to the cross bores (22,23, 24,25) linked to the dump valves and the control valves. The whole housing is made from a single casting and is machined with simple processes. Two angled bores are drilled from each end of the central bore,with double headed drills for a simple low cost process. The angled bores at each end are set so as not to cross each other.