Method of braiding and selected packing raw material is dedicated to the individual chemical and thermal requirement.
FDA conform products are available, example Trapez-Pack® TP619 and S6SI for Pumps and Mixers, A19OX for valves.
Food Approval EC 1935:2004 in accordance with EU10/2011 for Trapez-Pack® TP30 und TP63.
A 19OX Oxygen
A190X Oxygen has a low coefficient of friction and displays low stem/spindle frictions.The packing is non-ageing and has a long lifetime. In applications with high pressure or vacuum, die formed bullrings of S4 are recommended, top and bottom, to prevent extrusion. The packing rings require minimal maintenance and readjustments.
S 6 SI
Highest chemical resistance for a packing in rotating equipment; Pliable, easily compressible packing; Self lubricating, dry running capability; Shaft protecting surface hardness of HRC 25 is sufficient; Non ageing
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
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
Wear resistant through Running Track Reinforcement; Very high heat conductivity through employment of a special heat conductive Compound;
Clean packing, no contamination of medium; Increases the operative lifetime due to high mechanical strength and excellent heat conductivity; Provides maximum protection of shaft against wear (surface hardness HRC 25 is sufficient).
In a food processing plant, 4 rings of dry PTFE packing in 12.7 mm on a 30 mm shaft were installed in an Isegen rotary valve. The pressure was low and was only 1 bar. The food to be sealed was at room temperature. The service life of the packing was mostly only 2 weeks and ended with an uncontrollable leakage. The shaft sleeve used had to be replaced after 12 months. The TP619 was chosen as an improvement. It has lasted 6 months so far.
heat conductive ePTFE Yarn and form stable PTFE fibers