EP valve control box – reverse engineering

A fleet of post privatisation AC EMU’s are fitted with a step rate sander with an OEM that does not adequately support the system.
The original design of EP valve control box was experiencing significant failures and the original components used were obsolete.
We were asked by the vehicle maintainers if we could help.
We reverse engineered a new EP control box which was compatible with the existing system and used modern, rail compliant, components and delivered 10 new boxes and a full documentation pack to support Engineering Change in 12 weeks.