As a direct replacement for John Crane Type 606 and similar models, this metal bellow mechanical seal eliminates elastomeric secondary seals, making it the ultimate solution for applications involving hot oil, asphalt, bitumen, and aggressive chemicals where temperatures soar up to 425°C (800°F). 

The 10k27 Metal Face Seals is a heavy-duty, high-performance mechanical seal specifically engineered for the extreme conditions of top-entry reactor agitators and mixers. Designed as a direct replacement for leading OEM models, this seal features a robust metal bellows construction that eliminates elastomeric secondary seals, providing unparalleled resistance to high temperatures (up to 400°C) and aggressive chemical media. 

• Wave Spring Technology: Provides uniform face loading with a fraction of the space of coil springs, preventing face distortion.

• Replaceable Faces: wave spring seals are designed with snap-in faces for easy refurbishment and material upgrades (e.g., swapping Carbon for GFT).

• Edge-Welded Bellows: We use precision edge-welded leaflets which offer a higher stroke-to-length ratio and better fatigue life compared to formed bellows.

• Damped Vibration: The bellow structure inherently dampens stick-slip vibration, preventing face chattering at high temperatures.

• 45-Degree Tilt Edge: The bellow leaflets are welded at a 45-degree angle to disperse stress concentration, ensuring the bellow doesn't crack under high pressure pulsating loads.

• Balanced Hydraulic Design: Effectively balances the closing force to prevent face opening during pressure drops or vaporization.

• Micro-Welding Technology: We utilize advanced laser micro-welding to fabricate these small bellows with consistent spring rates and high flexibility.

• Direct Shaft Fit: Designed to fit standard metric tolerance shafts directly without the need for complex sleeves.

• Robust Drive Lugs: Features heavy-duty drive lugs to transmit torque reliably even when processing high-viscosity fluids like bitumen.

• Grafoil Secondary Seals: Uses die-formed flexible graphite rings exclusively, ensuring zero rubber content for maximum temperature capability.

• Direct Torque Transmission: Torque is transmitted directly through the bellow tail or drive collar, eliminating the need for drive pins that can wear out.

• Balanced by Design: The effective diameter of the bellow changes with pressure, providing a naturally balanced face load for varying pressures.

• Vibration Damping: The multi-ply bellow construction dampens the high-frequency vibrations often found in high-speed boiler feed pumps.

• Hydrodynamic Face Grooves (Optional): Faces can be laser-grooved to promote fluid film formation, preventing dry running in hot water.

• Self-Cleaning Rotation: The rotation of the bellow creates a strong centrifugal force that ejects solids from the seal cavity, keeping the faces clean.

• Double-Ply Options: Available in double-ply bellows for higher pressure ratings required in deep-well submersible applications.

• Exact Dimensional Match: Replicates the working length and mounting dimensions of the Roten original, ensuring a drop-in fit without pump modification.

• Enhanced Bellow Strength: We use a high-density welding process that increases the fatigue strength of the bellow leaflets compared to standard commercial versions.