In the beginning, NEA produced hydraulic presses, decatizing rollers, reciprocating steam-powered engines and napping mills.

In the early 1900s, NEA expanded its product portfolio to include piston steam engines, reciprocating compressors, vacuums, liquid pumps and drying systems.

Neuman & Esser acquired the licenses for the construction of the Raymond pendulum roller mills from the insolvent company, Mehler.

[citation needed] In 1972, Neuman & Esser expanded its facilities to a new factory site in Übach-Palenberg, 20 km away from Aachen.

The employee later retracted the accusation; however, NEA released a statement supporting the case against the Scotsman, who was subsequently sentenced to three months in prison.

[5] One day after the Scottish man was sentenced, it was announced that Dubai's ruler, Sheikh Mohammed bin Rashid al-Maktoum, ordered Harron to be released.

The core competence in the production of compressors has also been expanded through the acquisition of Stasskol, a manufacturer of piston rings and sealing systems.

NEA mills are used for applications within the ceramic and chemical industries, including pigment production and processing technologies.

NEUMAN & ESSER acquired from MAN Turbo the entire division of After-Sales Service for Borsig-Berlin piston compressors built in Berlin up to the end of 1995.