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QB

Mechanical Seal Flowserve

The QB is a single, balanced, multi-spring pusher seal designed for general service applications, particularly within the petrochemical and chemical industries. It fully complies with API 682 type A standards. The QB seal is versatile, with various design variations including the QBQ for low emission, light hydrocarbon service, the QBB for dual balanced rotating assemblies, and the QBU for hot water service without extra cooling.

Specifications
Technical Data
Industries
Applications
Documents
Contact

Specifications

Standards: API682
Pressure: Up to 255 psi (17.5 bar)
Temperature: Up to 340°F (170°C)

Technical Data

Design Variations:

QBQ: High balanced, low emission design for light hydrocarbons, handles specific gravities down to 0.45 with multi-port flush.
QBB: Dual balanced rotating assembly, provides reverse pressure capability for API 682 arrangement 3 requirements.
QBU: Lube-groove design for hot water service, operates without the need for extra cooling.
QB-GSL: Non-contacting seal option.

Industries

Waste Processing
Pharmaceuticals
Water Handling and Treatment
Products Pipeline
Water Injection
SAGD (Steam-Assisted Gravity Drainage)
Acid Transfer
Heavy Oil and Upgrading
Alkylation
Slurry Processing
Auxiliary Systems
Solvents
Catalytic Cracking
Utilities
Caustic and Chlor-Alkali
Crude Handling and Treatment
Crude Pipeline
Delayed Coking
Distillation
Hydrocracking
Hydrotreating
Logistics and Tank Farm
Volatile Organic Compounds
Polymers

Applications

Suitable for various chemical and petrochemical processes, including hydrocarbon handling, water treatment, and acid transfer.

Documents

QB Series.pdf

Contact Us

Contact our Mechanical Seal Team

Chris Sheeran (External) – Mob: 087 755 9936
Evan Twomey - 083 162 0251
Miriam Adair - Tel: 021 461 7235
Office Tel: 021 461 7200

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