Shanggao ValveDouble Block & Bleed Isolation
DBB Valves
API 6D DBB — positive double isolation with cavity monitoring. Single-body replaces three-valve assemblies at pipeline stations.

Gulf Application
Specified at metering stations, pig launchers, and maintenance isolation points in Gulf gas transmission.
Technical Specifications
Sizes
DN50–DN900
Pressure
Class 150–2500
Temperature
-46°C to +350°C
Available Variants
DBB BallDBB GateDIB-1DIB-2Needle BleedFlanged Bleed
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