Hydraulic pivot hinges are commercial-Hinges and offer a smooth, controlled door operation. They are very quiet because hydraulic fluid is used, and precise positioning is possible with the push-and-pull of a hydraulic piston, which makes them more suitable for high traffic locations. Their design allows for heavy doors, with self-regulation of closing speed for safety and accessibili... https://doorpivot.com/products/hydraulic-pivot-system-hold-open-soft-close-max-440lb-mod-jk05214ho?variant=48005042995489