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Compact Double Block & Bleed Design

Integral DBB Valves

Integral DBB valves are selected when a project wants the isolation and bleed functions packaged into one compact valve assembly instead of a longer conventional spool arrangement. The main buyer value is reduced installation envelope and fewer external joints, but the exact internal arrangement still needs to match the required line function.

Compact Integral BodyTwo Isolation PointsBleed / Vent PathProcess & Pipeline Service

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Integral DBB Valves engineering collection

Related Collections

Compare Related DBB Designs

Use the related collection pages to keep valve architecture, installation function and buyer intent separate.

CLOSURE ARRANGEMENT

Closure Arrangement

Double Ball DBB Valves

Use this collection when the RFQ specifically calls for two ball closure elements in one DBB assembly.

Two-ball isolation

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PIPELINE VARIANT

Pipeline Variant

Trunnion Mounted DBB Valves

Use trunnion-supported DBB construction when the line size, class and pipeline seat philosophy require it.

Pipeline DBB

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INSTRUMENT INTERFACE

Instrument Interface

DBB Monoflange Valves

For compact flange-mounted instrument hook-ups, compare monoflange construction instead of a line-size DBB valve.

Flange-mounted instrument DBB

View collection →

Buyer Selection Matrix

Integral DBB Selection Points

Body architecture	Confirm one-piece / compact integral construction required by the project and the maintenance access available around the valve.
Bore requirement	State full bore or reduced bore where the application makes this important. Do not assume the bore from the DBB label.
Isolation elements	Define the number and type of closure elements, seat arrangement and required isolation behavior.
Bleed / vent connection	Specify port size, connection type, direction and whether the bleed is manual, piped or connected to a closed system.
End connections	Confirm flanged, butt-weld or other project-approved interfaces and the required facing / preparation.

Selection Logic

Why Buyers Use Integral DBB Construction

A conventional isolation arrangement can require multiple valves, nipples, flanges and field joints. An integral DBB assembly packages the isolation and bleed functions into one body, which can shorten the installed assembly and reduce external leak paths. That benefit is only useful when the internal valve arrangement, bore, pressure rating and bleed routing still satisfy the project specification.

Application and isolation function

Pressure / temperature boundary

Material compatibility

Connection interfaces

Operation and access

Testing and documentation

Project Application

RFQ Focus for Integral DBB Valves

Send the line number or P&ID reference together with size, pressure class, body material, trim/seat requirements, bore, end connections, bleed port details, operating method, service conditions and required tests. If the valve replaces a conventional multi-valve spool, provide the available face-to-face envelope and any weight or support constraints.

For final selection, use the project valve specification, piping class, instrument hook-up drawing or approved datasheet as the controlling document.

Factory & Quality Evidence

Review Supplier Evidence Before PO

Buyers can review YINKE VALVE factory information, quality documents, sample inspection records and project references before technical and commercial confirmation.

Factory & Production Quality & Certificates Project References Send RFQ

Buyer Questions

Integral DBB Valves FAQ

Why specify an integral DBB valve instead of separate valves?

The typical reason is to reduce installed length, external joints and assembly weight while keeping two isolation points and a bleed function in one compact unit.

Does “integral DBB” automatically mean two ball valves?

Not necessarily. Integral describes the compact combined construction. The RFQ should still identify the required internal closure arrangement.

Should face-to-face dimensions be included in the inquiry?

Yes when space is constrained or the DBB valve replaces an existing spool. Give the available envelope or required dimensional standard where applicable.

RFQ Checklist

Information to Send for Review

Line function / P&ID tag

Integral body requirement

Size and pressure class

Full or reduced bore

Body / trim / seat materials

End connections

Bleed port size and direction

Operator arrangement

Face-to-face / envelope constraint

Testing and documentation

Technical data is confirmed against the final quotation, approved drawings and project specification.

Need a DBB Valve Quotation?

Send the valve list, datasheet, P&ID or instrument hook-up drawing for technical and commercial review.

Send RFQ