Sugar industry
In order to achieve an optimum service life and at the same time meet the demands of the food industry, plants and manufacturers in the sugar industry have to maintain a complicated balancing act.
ProPack AG offers high-performance, long-lasting products for the multitude of processes that range from yard operations to extraction to the sugar house to filling. One example: EU 1935:2004 tested food-grade hybrid pack to prevent contamination made of white, thermally conductive PTFE and aramid yarns.
Packing types
Products customized for applications in the sugar industry.
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Valve Packing
A 37 GraphoFlon
No slip stick effect; High cross section density; High temperature resistant to minimize emissions; Non hardening, good reset capability; Coefficient of thermal expansion similar to steel; Easy to cut, install and disassemble; Low coefficient of friction minimizes the adjustment force in valves; Recommended as die formed rings; For valve applications rings should be approx. 25 - 30% compressed at installation
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Valve Packing
A 99 Spezialgraph
Universal plant wide use in static applications; Extrusion stability through ultrafine 10 myh Inconel mesh reinforcement on each strand; Non hardening, good reset capability, coefficient of thermal expansion corresponds to the coefficient of steel; High temperature and pressure resistance; Easy to cut, assemble and disassemble; Low coefficient of friction minimizes the adjustment force in valves; For valve applications rings should be approx. 25 - 30 % compressed at installation; A 99 can be used as bullrings for style A 44 I, P60 and ARF; Die formed rings are recommended; Contains effective passive corrosion inhibitor
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Trapez Pack
Trapez-Pack®30
Excellent Standardisation features; Cross section impregnation avoids the penetration of crystallizing mediums; Wear resistant against abrasive products and with minimal coefficient of friction; Self lubricating fiber with high Carbon content, reduced shaft wear and excellent heat transfer characteristics; Thermally balanced construction, the coefficient of expansion is similar to steel, the packing is volume stabile and does not shrink. Therefore minimal re-adjustment needed after installation; excellent chemical resistance; Recommended shaft surface hardness: HRC 45
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Trapez Pack
Trapez-Pack®63 Papermaster HS
Clean packing with ultimate heat conductivity for abrasive products in pumps and other rotating equipment; Recommended shaft surface hardness: HRC 35; Porosity filling coating increases density and protects the packing in crystallizing mediums; W-Profile Reinforcement reduces shaft wear
Case studies Sugar industry
Sealing applications in practice
In a sugar factory, a ParaAramid packing was used in a Warman 10/8M pump to seal sugar juice. The operating data were 1400RPM, 4 bar and 70°C product temperature. The previous service life was 2 weeks. The product contaminated the pump environment by uncontrollable leakage and also penetrated the bearing housing. Carbon fiber/PTFE packing TP30 was installed, and the pump ran through the entire campaign with controllable drip leakage.
Trapez-Pack®30
High purity carbon fiber
At a sugar manufacturer a diffusion tower needed to be sealed. It had a 500mm shaft which turned at 8 RPM. The packing had a dimension of 25mm, 5 rings have been installed. In use was a PTFE/Graphite Packing which was ParaAramid corner reinforced. Service time was 2 weeks. The customer reported that it destroyed the shaft sleeve and since the leakage was not controllable the bearing arrangement was damaged too, and the repair cost have been enormous. TP30 was chosen as a replacement and the customer reported that he can easily maintain the required drip rate and has it still installed after 3 months of service.
Trapez-Pack®30
High purity carbon fiber