DISASTER BUSHING D016
Please look for the bushing “DB” in the outboard end of the gland
This bushing is used in API (American Petroleum Institute) glands to support the shaft in the event of a bearing failure, or to prevent product from rushing to atmosphere after a seal failure.
The close clearance (0.025 in. or 0.5 mm.) directs most of the leakage through a drain connection (180 degrees from the quench connection) in the seal gland to an appropriate container.