18061659285
ASTM A105N Class 1500 Flanged Twin-Ball Double Block and Bleed Ball Valve
Product Parameters
Product Name |
ASTM A105N Class 1500 Flanged Twin-Ball Double Block and Bleed Ball Valve |
Valve Type |
Flanged Twin-Ball DBB Ball Valve |
Sample Shown |
1" × 1", ASME Class 1500, ASTM A105N, dual manual handles |
Structure |
Two independent ball closures with intermediate bleed / drain connection |
Size Range |
1"–12" / DN25–DN300 as standard project range; larger sizes available by design confirmation |
Pressure Rating |
ASME Class 150 / 300 / 600 / 900 / 1500; Class 2500 available by project design |
End Connection |
RF / RTJ flanged ends; other flange standards available by project requirement |
Bore Type |
Full bore / reduced bore optional, subject to valve size and project design |
Ball Design |
Floating ball design for compact sizes; trunnion mounted design available for larger sizes or higher pressure by project confirmation |
Body Material |
ASTM A105N; A350 LF2, A182 F304/F316, A182 F51/F53, A182 F11/F22 optional |
Trim Material |
SS304, SS316, Duplex SS, 17-4PH stem and project-specified trim materials available |
Seat Material |
PTFE / RPTFE, PEEK, Devlon, Nylon / PA; metal seat optional by service condition |
Operation |
Dual manual handles; gear, pneumatic or electric actuation available by project design |
Temperature Range |
-29°C to +200°C for soft seated design; up to +425°C for metal seated design by material and sealing confirmation |
Design & Test Standard |
ASME B16.34; API 598 / ISO 5208; API 6D available by project requirement |
Design Standards |
Designed in accordance with API 6D, ASME B16.34, BS 5351 |
Application |
Oil & Gas Pipeline Isolation, Refinery & Petrochemical Process Units, Chemical Processing, Metering Skids and High-Pressure Process Piping |
Brand |
SLVCN |
Key Features
Class 1500 Flanged DBB Design
The sample shown is a 1" × 1" Class 1500 flanged DBB ball valve with ASTM A105N body material, designed for high-pressure pipeline isolation and compact installation points.
Twin-Ball Double Block and Bleed Isolation
Two independent ball closures provide upstream and downstream shut-off, while the intermediate cavity supports double block and bleed isolation requirements.
Intermediate Bleed / Drain Verification
The bleed / drain port allows the cavity between the two ball closures to be vented, drained or monitored, supporting pressure release and leakage verification before maintenance or inspection.
Compact Integrated Flanged Body
Compared with a traditional assembly using two separate block valves and one bleed valve, the integrated DBB body helps reduce installation length, flange joints, component quantity and potential external leak paths.
Dual Manual Handle Operation
Two manual handles allow independent operation of both ball closures, giving operators clear open / close indication and isolation logic during field operation.
Project-Based Configuration Options
Body material, trim material, seat material, bore type, pressure class, flange standard, operation method and testing documents can be selected according to actual service conditions.
Product Details
SLVCN ASTM A105N Class 1500 Flanged Twin-Ball Double Block and Bleed Ball Valve is designed for oil & gas, refinery, petrochemical, chemical and high-pressure process piping applications where double block and bleed isolation, cavity pressure release and leakage verification are required.
The sample shown is a 1" × 1" Class 1500 flanged DBB ball valve with ASTM A105N body material and dual manual handle operation. Two independent ball closures and an intermediate bleed / drain port are integrated into one compact body, helping reduce separate valve assemblies, flange joints, installation space and potential external leak paths.
When both ball closures are closed, the cavity between the two balls can be vented, drained or monitored through the bleed / drain port. This supports pressure release and leakage verification before maintenance, inspection or process line intervention.
Dual manual handles allow independent operation of both ball closures with clear open / close indication. Body material, trim material, seat material, bore type, pressure class, flange standard, operation method and testing requirements can be customized according to project specifications.
API 598 / ISO 5208 testing, MTC, pressure test report, inspection report and CO can be supplied according to order requirements. API 6D requirements are available by project confirmation.
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