Zhejiang, China
Business Type:
Manufacturer/Factory & Trading Company
Business Range:
Agriculture & Food, Chemicals, Industrial Equipment & Components, Instruments & Meters, ...
Management System Certification:
ISO 9001, ISO 14001
Main Markets:
North America, South America, Europe, Southeast Asia/ Mideast, Africa
OEM/ODM Availability:
OEM/ODM Service
Sample Available

Dbb Valve, SBB Valve, Flanged Dbb Valve manufacturer / supplier in China, offering Forged Body Integral Double Block and Bleed Valve (GADBB), Cast Steel Split Body Standard Port Ball Valve (116), Cast Steel Split Body Reduced Ball Valve (GARQ41F) and so on.

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Supplier Homepage Products Ball Valve DBB Ball Valve Forged Body Integral Double Block and Bleed Valve (GADBB)

Forged Body Integral Double Block and Bleed Valve (GADBB)

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Min. Order / Reference FOB Price
1 Piece US $1-10,000/ Piece
Port: Shanghai, China
Production Capacity: 10000PCS/Year
Payment Terms: L/C, T/T, Western Union, Paypal
Material: Carbon Steel
Connection Form: Thread X Flange
Driving Mode: Manual
Nominal Pressure: ANSI CLASS 150-900
Channel: Straight Through Type
Structure: Floating Ball Valve

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Basic Info

Model NO.: GADBB
Type: Floating Ball Valve
Temperature: Normal Temperature
Application: Industrial Usage
Trademark: GOOLE, OEM
Transport Package: Plywood Case
Origin: China(Mainland)
HS Code: 8481804090

Product Description

Dublok double block and bleed valve assemblies have three valves - primary isolation, secondary isolation and bleed - all integrated into a single block.  If required the inlet or outlet end connection can incorporate a spring loaded in-line piston check valve.  The end connectors are interchangeable and can be specified to suit exact requirements.

Our Ball valve double block and bleed assembly is very compact and is recommended for general services.  The valve can incorporate Needle, Globe, Gate and Check valves into the design to suit particular duty specifications as required.


Process Isolation

Drain Line Isolation

Double Block & Bleed

Blow Out Proof Stem Design

ISO 5211 Mounting Pad

Fire-safe Certified API 607

Anti-Static Device

Bi-directional Sealing

Low Fugitive Emission Packing

Locking Device Standard

Double Block and Bleed ball valve Applicable Specification

Design standard: ANSI B16.34     GB/T12237
Physical dimension: ANSI B16.10    GB/T12221
Flanges dimension: ANSIB16.10     GB/T15188.1
Test and inspection: API598        GB/T909


HP instrument connections for in line maintenance
Process vents
Process drains
Level instrument gauges
Injection points (with check)


Size:2" ~ 24"(DN50~DN400)
Pressure:ANSI Ratings 150# ~ 2500# (PN16~PN420)
Structure:3 Pieces Body Design
Connections:RF RTJ BW Connections
Body Material: ASTM A105, A182 304, A182 316, A182 304L, A182 316L,A182 F6A,A182,F51,A182 F53,F22 Alloy 
Ball Material: ASTM A105, A182 304, A182 316, A182 304L, A182 316L,A182 F6A,A182,F51,A182 F53,F22 Alloy
Seats Material: PTFE/ RTFE(≤120ºC) , NYLON (≤80ºC), PEEK/PPL  (≤250ºC)
Driving means:Manual,worm gear.etc.
Flow direction:bidirectional
Applicable medium:Seawater,all kinds of harsh environment

Double Block and Bleed ball valve structure characteristics

1. The double block and bleed valve have evolved to replace and add the process of bolting together individual valves to make the valves in one body .it saved a lot of space and material.
2. Special designs including injecting quills ,sample probes ,double block and single block, in-built check valves and seat wipers.
3. Dual isolation is necessary requirement when maintenance is taking place down stream of the first isolation valve. Cavity venting is provided by either a ball or globe OS&Y vent valve so that trapped pressure between the two isolation valves is safely vented.
4.  These valves have also evolved to encompass the function of chemical injection (using a suitable quill) and sample points .In-built check valves are often integrated in these valves.
5. Fire Safe according to BS6755/API 6FA/API 607, since each sealing point is provided by a secondary fire-safe seal in graphite. Valve soft seats also are provided with secondary metal-to metal seal in case of fire.
6. Valve design can be either Trunnion or floating type ,anti blow -out stem and typically SPE seat design .Drain port is normally provide with a floating ball valve ,to be fitted with final user drain line .valve seats can be soft or metal to metal hard-faced. 

Main Parts and Material.

Part nameMaterial
1Valve bodyWCBA2116-WCB
2Sealing ringPTFEPTFE
6The stone bodyWCBA216-WCB
7ShimGraphite + stainless steelB12.10-304F/.G
9Packing glandWCBA2116-WCB
10Locating piece25A105
11Ring65MnAISI 1066
13Valve stem1Cr33A276-410
 Thrust washerPTFEPTFE

Technical Specification
Design basisGB seriesAmerican Standard Series
Design standardGB/T12237AP16DANSI B16.34
Flange connection structure lengthGB/T12221AP16DANSI B16.10
The length of the structure ( welding )GB/T15188.1AP16DANSI B16.10
Connecting flangeGB/T9113 
ANSI B16.5
Butt welding endsGB/T12224ANSI B16.25
Test and inspectionGB/T9092AP16DAP1598

Main Dimensions
Nominal diameter15202540506580100125150200


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