Face Geometry Matters: T-Groove, APG and Wavy-Face Seal Technologies

With non-contact molding, the shape of the sealing surface determines the ability to create a stable gas or liquid film. The article summarizes some of the surface technologies published by Flowserve.

On the face of dry air.

Gaspac Dry Gas Groove uses either of the two rope models: T-Groove two-way or Advanced Pattern Groove (APG). According to the company, both produce rigid and high-tremor-reduction air membranes, keeping the air membrane stable at slow speeds and high speeds of up to 250 meters per second.

Waves for pumping.

QBQ LZ uses Precision Face Topography technology, a patented wave topography, to dramatically reduce diffuse leakage in light hydrocarbon service.

Remove the air barrier.

The GX-200 uses the APG shell model, which combines metal folding pipes, creating hydraulic and hydraulic lifting power so that the shell does not come into contact with the shell. The company says that the shell achieves zero product emissions, even when running dry, and can be installed in a standard shell chamber without repairing the pump.

What to remember.

• The shape of the façade directly affects emissions and longevity.
• Each pattern is suitable for different speeds, pressures and temperatures.
• Verify the actual parameters with the supplier.

Source of reference.

Flowserve product documentation, AIChE. Articles compiled and reinterpreted by SNS-VN; the brand name belongs to the owner.