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QB Series Pusher Seal
Brand: Flowserve CorporationQB Series seals are balanced pusher seals available in single and dual seal configurations used for sealing environmentally-restricted products and meeting the most stringent regulations.
The QB Series is fully compliant with API 682 Type A requirements.
Features- Greater Reliability And Installation Ease Assured By Rugged Components, Heavy Duty Seal Faces, And Cartridge Seal Configuration.
- Satisfies All API 682 Design And Qualification Test Requirements For Single And Dual Arrangement Seals.
- Optimal Face Cooling And Reduced Distortion With Available Multiport Injection.
- Increased Safety And Environmental Compliance Assured By Dual Seal Arrangement, Which Provides For Safety Backup And Emissions Control In Hazardous Services.
- Longer Equipment Life And Reliability From Design That Runs Cooler And Is Less Sensitive To Vapor Pressure Margin, Even Under Upset Conditions.
- Combat Dirty Services With The Clog-Resistant Large, Single Coil Spring In The QBS Seal.
- Handle Low Lubricity Hot Water Without The Need For Auxiliary Cooling Systems With The QBU Seal.
- Handle Vaporizing Hydrocarbons With The QBQ Seal.
- Handle Low Vapor Pressure Margin With The QBQ LZ Seal, Featuring Precision Face Topography Wave Pattern On The Stationary Seal Face.
- Low To Moderate Pressurized Barrier Dual Seal Applications Are Handled By The QBB Face-To-Back Configuration.
- Moderate And High Pressure Pressurized Dual Seal Applications, Including Piping Plan 53B, Are Handled By The QB2B Back-To-Back Configuration.
- Choice Of Throttle Bushing Design: Fixed, Floating, Or Segmented.
Specifications
Arrangement 1 Single Seal (Common Piping Plans 11, 13, 23, 32, 62)
- QB QBQ QBS QBU
Arrangement 2 Unpressurized Dual Seal with Dry Running Back-Up (Common Piping Plans 72, 75, 76)
- QBQ/GSL QBQ LZ/GSL
Arrangement 2 Unpressurized Dual Wet Seal (Common Piping Plans 52)
- QB/QB QBQ/QBQ QBQ LZ/QBQ
Arrangement 3 Pressurized Dual Wet Seal (Common Piping Plans 53A, 53B, 53C, 54)
- QBB/QB QB2B/QB
Pressure
- Up to 51.7 bar (750 psi)
Sizes
- 12.7 to 139.7 mm (0.500 to 5.500”)
Speed
- 23 m/sec (75 ft/sec)
Temperature
- -40° to 204° C (-40° to 400° F)