Triple-acting mechanical shaft seal

For toxic and explosive products
The ESD66H is designed for demanding processes that require high operational reliability and is well-suited for handling highly toxic and explosive substances.

Unique pressure relief and emergency function
With a third set of seal faces creating an additional barrier fluid chamber—and the option to install a pressure relief device—the ESD66H significantly reduces load on the sealing elements. In the event of failure in one set of seal faces, the seal continues to operate as a double-acting mechanical seal, maintaining operational safety.

Extended service life and reduced wear
The ESD66H not only ensures high operational reliability under extreme conditions but also provides extended service life, reduced wear, and lower leakage rates, making it a dependable choice for high-demand industries.

Especially suitable for extreme pressure and hazardous materials
This model is particularly suitable for industries handling specialty chemicals and hydrometallurgical processes, where extreme pressure and strict reliability requirements are critical.

For safe operation under challenging conditions
Triple-acting mechanical seals like the ESD66H feature two barrier chambers and are designed for processes with the highest standards of reliability. They perform effectively under extreme pressure and can continue to function as double-acting seals in emergency situations, ensuring safe operation during critical process conditions.

For vessel pressures up to 200 bar
The ESD66H can operate as a double-acting seal, with the upper seal chamber functioning as a pressureless safety seal. The option to use a pressure-splitter allows the vessel to be operated at double the pressure compared to conventional double-acting seals. For vessel pressures up to 200 bar, special supply systems are included to ensure continuous replenishment of barrier fluid, preventing fluid loss during operation.