Flowserve
Industries:
Waste Processing, Polymers, Water Handling and Treatment, Products Pipeline, Water Injection, SAGD, Acid Transfer, Heavy Oil and Upgrading, Alkylation, Slurry Processing, Auxiliary, Solvents, Catalytic Cracking, Utilities, Caustic and Chlor-Alkali, Crude Handling and Treatment, Crude Pipeline, Delayed Coking, Distillation, Hydrocraking, Hydrotreating, Logistics and Tank Farm, Volatile Organic Compounds, Pharmaceuticals
Standards:
API682
Single, balanced, multi-spring, pusher seal for general service, primarily applied in the petrochemical and chemical industry. The QB complies fully with all requirements of API 682 type A. Design variations include those mentioned below and customized QBW seals.
QBQ
High balanced, low emission, light hydrocarbon design, same operating limits as QB, specific gravity down to 0.45 with multi-port flush.
QBB
Dual balanced rotating assembly option (QBB) - provides reverse pressure capability for API 682 arrangement 3 requirements
QBU
Lube-groove design for hot water service without extra cooling. Pressure: To 255 psi (17.5 bar), Temperature: To 340°F (170°C)
QBR
Reverse configuration with stationary flexible element
QBQ/GSL
Dual seal configuration with dry-running lift-off containment seal provides near zero emissions and safety backup
QB Chart
