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DBB vs DIB-1 vs DIB-2 – Visual Comparison & Selection Guide -GEKO

DBB vs DIB-1 vs DIB-2 – Visual Comparison & Selection Guide -GEKO

March 26, 2026

 

Choosing the right isolation type is critical for safety, performance, and cost control in industrial systems.
GEKO trunnion mounted ball valves are available in DBB, DIB-1, and DIB-2 configurations to match different operating conditions.

 

Visual Diagram – How Each Valve Works

DBB (Double Block & Bleed)

 

 Advanced Technical Training on Ball Valves for Natural Gas

 

  • Two SPE (Single Piston Effect) seats
  • Sealing only reliable when both sides are pressurized
  • Automatic pressure relief to both sides

👉 Best for: Standard applications with cost priority

 

DIB-1 (Full Double Isolation)

 

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  • Two DPE (Double Piston Effect) seats
  • Full double isolation in any direction
  • No self-relief → requires external safety valve

👉 Best for: High-risk, high-pressure critical systems

 

DIB-2 (Hybrid Design)

 
https://www.tdwilliamson.com/sites/default/files/DBB%20Blog%20Images-02.png

 
  • One DPE + one SPE seat
  • High isolation on one side
  • Automatic pressure relief toward SPE side

👉 Best for: Balanced safety and cost

 

Quick Comparison Table  

Feature DBB DIB-1 DIB-2
Isolation Level Medium Highest High
Sealing Type SPE + SPE DPE + DPE DPE + SPE
Bidirectional Isolation Limited Full Partial
Pressure Relief Automatic (both sides) External required Automatic (one side)
Installation Direction Free Free Directional
Cost Low High Medium

 

Typical Applications

 

Oil & Gas Pipelines

  • High pressure shut-off
  • Hydrocarbon media
  • Critical isolation points

👉 Recommended: GEKO DIB-1

 

Petrochemical & Refinery

  • Flammable / corrosive media
  • Continuous operation
  • Emission control

👉 Recommended: GEKO DIB-2

 

General Industrial Systems

  • Water, gas, oil pipelines
  • Standard isolation & maintenance
  • Budget-sensitive projects

👉 Recommended: GEKO DBB

 

 

How to Choose the Right Valve

 

Step 1 – Flow Direction

  • Fixed → DBB / DIB-2
  • Bidirectional → DIB-1

 

Step 2 – Safety Requirement

  • Critical → DIB-1
  • Standard → DBB
  • One-side high safety → DIB-2

 

Step 3 – Pressure Relief

  • Automatic → DBB / DIB-2
  • Controlled → DIB-1

 

Step 4 – Budget & Installation

 

  • Low cost → DBB
  • Highest safety → DIB-1
  • Balanced → DIB-2

 

 

Why Choose GEKO Ball Valves

 

  • Trunnion mounted design for low torque & stability
  • Full bore design for minimal pressure loss
  • Fire Safe, ATEX, API 6D compliant options
  • Double Block & Bleed and advanced sealing technology
  • Designed for oil & gas, petrochemical, and high-pressure systems

 

Call to Action

 

Not sure which valve fits your project?
Contact GEKO today for a custom selection and quotation.

 

ГОРЯЧИЕ ТЕГИ : DIB Ball Valve Difference Pipeline Isolation Ball Valve Solution DIB-1 Ball Valve DBB vs DIB Ball Valve Difference DIB-2 Ball Valve DIB-1 & DIB-2 Ball Balve

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