GEMU's websites make use of cookies. If you are using the site, this means that you agree to the use of cookies. To implement personal settings, click here

GEMÜ glossary for valves and

automation components

Our glossary provides an explanation of around 400 technical terms and abbreviations relating to the pipeline construction sector. It focuses on valves, measurement and control systems and their areas of application.

AB more
​Drugs and Medicines Register of the Federal Republic of Germany. See also Pharmakopoea.
less
AB-DDR more
​Drugs and Medicines Register of the former German Democratic Republic
less
Absolute pressure more
​Absolute pressure is pressure measured relative to zero pressure (vacuum). The reference point is pressure = 0, i.e. perfect vacuum.
less
Absorption more
This procedure describes an effect in which a substance penetrates into the core of a solid or liquid.
less
Actuator more
​An actuator is a component for switching a process, e.g. servo-motor, solenoid valve. It intervenes in the process and changes the substance or energy flows. Actuators often convert these into mechanical work, e.g. movement.
less
Adsorption more
​Adsorption is the enrichment of substances at the surface of a body or at interfaces
less
AMA Fachverband für Sensorik e.V. more
​Founded in 1980 as "Arbeitsgemeinschaft Messwertaufnehmer"(consortium for measured value indicators). Represents the interests of all groups involved in the field of sensor system processes.  
less
AMWHV more
see GMP​
less
ANSI more
​American National Standards Institute
less
APC more
​Advanced Process Control is a superior method for controlling processes. It is used to control reactors and centrifuges as well as start-up, load change and product switching processes. ApC can help to minimize energy consumption, raw material consumtion and fluctuations of a process.
less
Aqua demineralisata more
​Demineralised water See D-Water and DI Water.
less
Aqua pro injectione more
​See Aqua ad injectabile (WFI)
less
Aquapurifica more
​Purified water Made for example by distillation, ion exchange, reverse osmosis or ultra-filtration from drinking water. No direct demand for sterility in accordance with drinking water quality.
less
ASTM more
​American Society of Testing Materials
less
Attestation for sterilisation more
​See sterile test and validation
less
B-value more
​Dimensionless number Value used in the food and dairy industry for determining the extermination effect in sterilisation processes. Siehe auch F-value.
less
Bacteriology more
​Knowledge of bacteria
less
Bacteriostatic more
​Retardant to bacterial growth Bacteriostatically active materials retard or prevent bacterial growth.
less
BBD more
​Best before dateSee also DIN 10 503
less
Benchmarking more
​Bench marking is a method of assessing the performance of a company, for example based on predefined characteristics in order to create comparability. These benchmarks indicate strength and weaknesses in individual areas and offer the possibility of optimization. 
less
BfArM more
Federal Institute for Pharmaceutical and Medical Products
less
Biofilters more
​Are biologically active filters for cleaning various substances, e.g. through micro-organisms. They are often used in sewage treatment plants. Biologial filters break down substances into different components, depending on the micro-organism culture.
less
Bioreactor more
​Is the main area of interest in the biological production of substances. In a bioreactor, micro-organisms bring about intentional reactions or changes, depending on the purpose. A bioreactor is not only useful for production of a single procuct, but can produce several products through several stages and procedures.
less
Boundary layer fauna more
​Biological coating on surfaces by micro-organisms, e.g. bacteria and fungi
less
Bursting disc more
​Is a safety organ, which by bursting creates a greater pressure release cross-section in the event of excessive pressure, e.g. an explosion, and releases pressure into the atmospere in this way. The bursting disc is usually made of metal or graphite.
less
Bypass more
​A bypass is a diversion of the actual route so that various properties can be measured at places where measurement is not possible at the desired location.
less