Double Block And Bleed Ball Valve

Double Block And Bleed Ball Valve – Dual Isolation with Bleed Capability

Double Block And Bleed Ball Valves (DBB) provide two independent sealing elements with an intermediate bleed port between them, enabling single-valve isolation equivalent to two block valves plus a drain valve. This configuration is critical for safety-critical applications requiring verified isolation before maintenance, custody transfer metering, or anywhere hydrocarbon release during maintenance operations is unacceptable.

The integrated design reduces installation space by 70% compared to traditional block-drain-block arrangements, critical for offshore platforms and compact process facilities. The bleed port enables verification of upstream and downstream seat integrity—if the bleed port remains dry when opened, both seats are proven tight; any leakage indicates which seat has failed.

Our Double Block And Bleed Ball Valve solutions serve international oil & gas markets from Nigerian offshore platforms to Middle Eastern custody transfer stations, meeting API 6D and API 6DSS requirements for applications where single-point isolation and verifiable safety are mandatory regulatory requirements.