MECHANICAL SEAL
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Flowserve Corp. has introduced the Flowserve QBQ LZ contacting-face mechanical seal, featuring Precision Face Topography and its patented wavy face seal design. Optimized for service with light hydrocarbons of specific gravity between 0.40 and 0.60, the seal is designed for use in refineries and the general hydrocarbon processing industry pumping ethane, ethylene, propane, propylene, butane and other related liquids.
Light hydrocarbons present unique challenges for these facilities
because of their natural tendency to flash from liquid to vapor at
ambient pressure and temperature conditions. Vaporization leads to
dry-running of seal faces and premature seal failure, which results in
the double failure of not meeting emissions and reliability objectives.
Beyond its application for vapor pressure margins between 5.0 and 50 psi, the QBQ LZ can also be used for high-pressure pumps above 300 psi at any vapor margin. The QBQ LZ operating range includes pressures from 0 to 750 psi, temperatures between -40° and 400°F, speeds between 20 and 75 fps, and sizes between 1.750 and 5.125 in.
flowserve.com
Beyond its application for vapor pressure margins between 5.0 and 50 psi, the QBQ LZ can also be used for high-pressure pumps above 300 psi at any vapor margin. The QBQ LZ operating range includes pressures from 0 to 750 psi, temperatures between -40° and 400°F, speeds between 20 and 75 fps, and sizes between 1.750 and 5.125 in.
flowserve.com
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