Applikationen

Bausch + Ströbel is a market leader in the manufacture of machines and whole production lines which process pharmaceuticals containers. Before being filled, the bottles, ampoules or sprays are washed, sterilised, dried and then closed. This process uses various types of water quality all the way up to pharmaceutical-grade water and sterile air. The media dispensers in the bottle washing machines are sometimes cleaned using sterile saturated steam in between production processes. To control the pressure level when various media are used under varying operating conditions, a precise pressure control valve is required, in particular one which conforms to the strictest hygiene requirements and which has excellent resistance to media and temperature. In photo 3, you can see the washing machines and sterilising tunnel from one such plant. The wall in the background separates the room from the neighbouring sterile room which contains the bottling and closing machines. On the washing machine in the foreground, you can see the Mankenberg pressure reducing valve in use, which guarantees the correct flushing pressure necessary for cleaning the bottles. In photo 2, you can see part of the product feeding mechanism in which Mankenberg pressure control valves monitor the varying pressure during production or in cleaning mode.

Pressure Red. DM 662 Product feeding Washing machine and sterilising tunnel with Mankenberg pressure control valve

Biodiesel is the biofuel substitute for mineral diesel fuel and is produced from oleiferous plants. In Germany rapeseed is the starting product. The required rapeseed oil methyl ester (RME or "biodiesel") is obtained by means of pressing the seeds, refining and ester interchange with methanol

 
The valve serves as pump protection valve at the rapeseed crude oil storage tank. The UV 5.1 ensures a maximum pressure of 10 through 12 bar at an outlet pressure of 1 bar at a flow rate of 30 m³/h.

 
The UV 5.1 combines chemical resistance of the materials (VA, FPM) with sufficient pressure resistance whilst simultaneously featuring a lightweight design. In some cases biodiesel (rapeseed oil methyl ester) is very aggressive to the used elastomers; for such cases FPM and PTFE have been used.

Whilst biodiesel is the biofuel substitute for mineral diesel fuel, bio-ethanol is the substitute fuel for otto fuels. Bio-ethanol is obtained by fermentation of grain using yeasts. An intermediate stage is the formation of slurry, which is very inhomogeneous (in principle a binary system with solid/liquid components) with very variable dynamic viscosities (100 through 2000 mPas).

In the fermentation/slurry destillation process a constant inlet pressure of 6 bar is required with an outlet pressure of 0.7 through 1 bar at flow rates of abt. 40 m³/h. This is ensured by the UV 1.8.

The Mankenberg backpressure relief valve combines chemical resistance of the materials (VA, FPM) with sufficient pressure resistance whilst simultaneously featuring a lightweight design at a high performance. This valve is suitable for different viscosities of the medium. In some cases bio-ethanol is very aggressive to the used elastomers; for such cases FPM and PTFE have been used.

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