BTUU Packing Ring Set – Ariel’s Low Emission Piston Rod Packing


Uncut Ring Technology eliminates the leak paths of conventional segmented rings resulting in reduced emissions compared to conventional ring sets. Uncut Ring Technology also generates less frictional heat, resulting in improved service life.

Each seal ring set in the BTUU packing contains a Radial-cut ring that is single-acting and allows gas to flow out of the cup on suction stroke, a Tangent-cut ring that seals at lower operating pressures, a polymer Uncut ring that seals the leak paths of the tangent cut ring and compresses against the rod at higher differential pressures and a metallic uncut ring that provides structural support for the polymer uncut ring.  The BTUU ring set includes our latest pressure breaker ring technology to further improve the performance of Ariel’s BTUU piston rod packing.



The Advantages of Ariel BTUU Technology


Reduced Temperatures


The increased sealing capacity of each ring set results in fewer cups per packing case. This decreases the frictional heat load by minimizing the number of rings in contact with the rod. The first ring set does the majority of the sealing, greatly reducing the pressure applied to subsequent tangent-cut rings - often eliminating the activation of the remaining uncut rings.


Reduced Fugitive Emissions


When properly applied and installed, along with a piston rod within wear limits, the BTUU piston rod packing has proven to demonstrate reduced fugitive emission leakage rates compared to conventional packing ring sets.


Operational Efficiency


The increased sealing capacity of uncut rings, reduced wear, and improved sealing integrity over the life of the packing means increased overall unit and facility performance.

Reduced Maintenance


Reduced Rod to packing contact, longer run-times, improved efficiency, and prevention of downtime, Ariel BTUU technology means fewer cups (and consequently fewer rings) required for each packing assembly, which reduces re-conditioning expenses during overhauls.

PSI Ranges Conventional Uncut
2000 (+) 5-7 Rings 4-5 Rings
800-2000 4-6 Rings 3-4 Rings
300-800 3-5 Rings 3-4 Rings
Below 300 2-4 Rings 2-3 Rings