The Pressure-Velocity (PV) factor is a critical design metric calculated by multiplying the fluid pressure ( ) by the mean velocity of the seal face (
Principles and Design of Mechanical Face Seals/Book and Disk
: The lapped surfaces of seal faces are flat within light bands; never touch the polished faces with bare, dirty hands or place them face-down on rough surfaces.
Mechanical seals require controlled environments to function reliably. The American Petroleum Institute (API) defines standard piping configurations to cool, clean, or pressurize the seal chamber.
: Covers everything from household washing machines to rocket engine turbopumps The Pressure-Velocity (PV) factor is a critical design
: Includes 64 data tables and over 360 references to help validate designs and experimental results . Reader Consensus Pros :
: Industry professionals frequently call it the go-to source for designing and modelling seals.
: Evaluates multiple simple and complex models for predicting seal behavior, including specific issues like heat checking , blistering, and instability .
The elastomers must withstand chemical attack and temperature extremes: : Covers everything from household washing machines to
Use the repack’s API 682 summary. Identify which seal arrangement (Arrangement 1, 2, or 3) fits your hypothetical design. Arrangement 3 (tandem with a buffer fluid) is industry standard for volatile hydrocarbons.
Open the calculation spreadsheet. Input values for a real-world scenario: a pump handling water at 100 psi and 2,000 RPM. Follow the design sequence:
Are you designing for a (e.g., slurry pumps, chemical reactors, high-speed turbines)?
📖 The Book: Principles and Design of Mechanical Face Seals : Alan O. Lebeck including specific issues like heat checking
) through a parallel seal gap can be estimated using the viscous flow equation:
"Principles and Design of Mechanical Face Seals" by Alan O. Lebeck is a foundational text detailing the tribology, material selection, and mathematical modeling required for effective industrial sealing. Key design elements include a primary sealing interface, hydrodynamic lubrication, and secondary sealing components to manage pressure and heat. Access the digital text for study at Open Library Prefeitura de Aracaju PRINCIPLES AND DESIGN OF MECHANICAL FACE SEALS
Detailed for common seal failures like leakage or face heat checking
