PACKINGS

If we designate the outer diameter of the spindle as d1 and the interior diam­eter of the gland or of the bottom ring as d2, then t = (d2 – d1)/2 is valid for the median radial gap between the spin­dle and the spacer or the bottom ring. In the case of an off-center position of the spindle or rod, the gap can double to one side to
2t = d2 – d1.

The table shows reference values for the maximum permitted size of the gap t in reference to the packing material. The influence of the operating pressure to be sealed was taken into account in this respect, as generally the smaller packing widths are inserted for the higher pressures.

Tolerances and the Composition of the Surface Area

For the rod or spindle, the accuraey degree should be h9. The surface area roughness should be Rz ≤ 2,5 µm or alternatively Ra ≤ 0,6 µm.

For the rod or spindle, the accuraey degree should be h9. The surface area roughness should be R ≤ 2,5 µm or alternatively R ≤ 0,6 µm.

For the gland, the tolerance accuraey degree D10 was proven. The surface area
roughness should be R ≤ 6,3 µm or alternatively R ≤ 2,5 µm.

TA-Luft demands the ”use of high-quality gaskets“. This high level of quality for flanges and fittings is defined in the VDI 2440 ”Emissions Reduction in Petrol Refineries“ Directive. Alongside high-quality seals for control and shut-off devices such as metal bellows with a down-stream safety stuffing box, sealing sys­tems such as the TA-Luft K80S TA-HT Packing can be used.

The first criterion for the equivalence is that the design layout of the sealing system permanently produces the intended func­tion under operating conditions.

Secondly, the specific leakage rates must meet the following limits:
» 10-4 mbar-l/(s-m) at sealing system temperatures below 250 °C or 10-2 mbar-l/(s·m) at sealing system tempera­tures greater than or equal to 250 °C.

The requirements placed upon these sealing systems are as varied as the applications, meaning that selection is performed according to prescribed criteria. In doing so, the application pa­rameters such as temperature, pressure, medium, type of movement and maximum applicable lifting force as well as the number of expected lifts during the entire period of operation must be taken into account.

K80S TA-HT is a packing unit with a total of seven rings. They partly consist of rings manufactured from graphite with stain­less steel sheet inserts and partly consist of rings manufac­tured using flexible graphite as well as stainless steel foils lo­cated in between. The K80S TA-HT was classified as high-qual­ity packing within the meaning of the TA-Luft for temperature ranges greater than or equal to 250 °C by the MPA in Stuttgart with certificate no. 0005/2012.

The Kempchen Packing Installation Kit is suitable for re­moving old packings from stuffing boxes of, valves, pumps, agitators, etc. It is delivered in an impact resistant case with a foam rubber insert. The case is equipped with the most commonly used packing extractors, the corresponding re­placement tips as well as a packing cutter. Each tool has its own place in the case due to the separate spaces in the foam insert.

With the Kempchen Packing Installation Kit in the case, the assembler has a universal and indispensable help aid at hand.

Packing Cutting Equipment

The Kempchen Packing Cutting Equipment allows for the cut-out of entire packing rings made from bulk stock. Many advantages arise from its simple handling, such as cutting without waste and scrap, high reliability and time savings. The Kempchen Packing Cutting Equipment is designed for ring averages up to 150 mm and a packing width up to 25 mm.