BOT Rings

Long service life of pressure packings

  • Design leads to even wear of packing seals
  • Lower rod temperatures for longer life
  • Low piston rod wear

BOT (balanced overlapping tangent) ring pairs are used in pressure packings of new and retrofitted reciprocating compressors for a variety of compression processes. Typical applications include the compression of heavy gases as well as air compression.

As a result of their unique design, HOERBIGER BOT ring pairs solve the problem of premature wear of the first ring pair. The special geometry of the rings assures that all ring pairs of the pressure packing specifically and uniformly contribute to reducing the pressure. This eliminates load peaks on individual rings, considerably boosting durability and reliability. In addition, friction and the temperature on the packing decrease. This increases both the efficiency and service life of the compressor.

Pressure balancing is achieved by the special L shape of the radial ring supporting the tangent cut ring. Select materials offering excellent tribological properties assure minimized wear and friction loss.

Technical data

BOT sealing ring imperial metric
Piston rod diameter (in / mm) 0.55 to 7.8 14 to 200
Maximum piston speed (ft/s / m/s) 20 6
Maximum operating temperature (°F / °C) 392 200
Maximum operating pressure (psi / bar) 1,450 100