Sealing solutions for flexible processes
Products in the fine chemical industry are manufactured in discontinuous processes. Successive production steps, such as mixing, reacting, and separating are typical here. Very special chemical substances and products are often manufactured.
Flexible, multi-purpose systems, usually equipped with agitators, reactors, filters, dryers and other special equipment, are predominantly applied. The particular challenge for sealing technology: different manufacturing processes, which are often crystallizing, paste-like, highly viscous or highly corrosive media under changing pressure and temperature conditions.
Machines and devices applied in fine chemicals - four steps to the end product

A Korean chemical company seals its Bühler bead mills for paint production with MR1S1F-D24 type mechanical seals. The process medium – colored pigments with various solvents – is very abrasive.
A Roth pump, sealed with a MAK66 magnetic coupling, in use at a manufacturer of soap and cleaning agents in the US.
Operating conditions: p = 22 bar (319 PSI), t = 50 °C (122 °F), n = 3,500 min⁻¹.
Dupont de Nemours and Company in Pass Christian, MS, USA, uses several expansion joints in steam / colored pigment production.
Operating conditions: p = +0.48 … -0.48 bar (+70 ... -70 PSI), t = 354 °C (669 °F).
Centrifugal pumps at Polymer-Latex GmbH in Marl, Germany, are successfully sealed with Cartex-DN type seals. The process medium – a latex dispersion – represents a challenge for the seal. The FLC200 flow rate control unit supplies and flushes the seal.
Read the complete case study.
Gas-lubricated AGSR3L-D agitator seals in vacuum paddle-wheel dryers for liquid crystal production at Merck KGaA in Darmstadt, Germany. The process medium – organic crystalline substances in various solvents such as toluene and methanol – has a pronounced tendency to form deposits, so a patented flushing process is used upstream of the dynamic sealing element on the product side to protect the seal and to improve the cleaning efficacy. A GSS4012 is used as the buffer and flush gas system.
Read the complete case study.
Tytan Organics Chemical Co. in the United Arab Emirates uses glass-lined reactor vessels to produce concrete plasticizers. The flanges and covers are sealed with Burachem multi-gaskets made from pure PTFE. Medium: Napthalene sulphonate formaldehyde.
Operating conditions: p = 6 bar (87 PSI), t = 220 °C (428 °F).
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Wacker Chemie AG in Burghausen, Germany, seals a number of top-drive high pressure reactors for polymer dispersion production with HSHLV-D type high pressure seals with cooling flange. A shared buffer system supplies all the seals.
Operating conditions: p1 = vacuum … 100 bar (1,450 PSI), t = … 100 °C (212 °F), n = 25 … 100 min-1.
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