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| Customization: | Available |
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| Media: | Oil, Gas, Water,Acid |
| Material: | Stainless Steel or Alloy |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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DBB / SBB Double Block and Bleed Ball Valve (Flange x Female NPT, ASME B16.5)
The DBB (Double Block and Bleed) Ball Valve is a high-performance industrial valve designed to provide dual isolation and bleed functionality in a single compact unit. It features two independent sealing surfaces (ball seats) and a middle bleed port, allowing for pressure release, cavity drainage, or seal integrity testing. This design ensures enhanced safety, efficiency, and reliability in critical applications such as oil and gas, chemical processing, and power generation.
The valve is constructed with Flange x Female NPT ends, complying with ASME B16.5 flange standards and ASME B1.20.1 for NPT threads, offering flexible integration into diverse piping systems.
Key Features
Material: Body, ball, and stem constructed from Hastelloy® C276 for superior corrosion resistance.
Design: Full bore design for minimal pressure drop and unrestricted flow.
Seat: Reinforced PTFE seats for tight sealing and low torque operation.
Connection: Flange ends compliant with ISO 5211 and ASME B16.5 standards for easy installation.
Operation: Lever-operated for quick 90-degree on/off control.
Pressure Rating: PN16 (16 bar) at ambient temperature.
Temperature Range: -29°C to 200°C (-20°F to 392°F).
Dual Isolation & Bleed: Two independent seals with a middle bleed port for safe maintenance and testing.
Flexible Connections: Combines ASME B16.5 flanges and female NPT threads for easy installation.
Robust Construction: Forged or cast body materials (two-piece or three-piece design) for high-pressure/corrosive environments.
Material Comparison Table
| Material | UNS Number | Key Applications | Properties |
|---|---|---|---|
| Hastelloy® C276 C22 B3 | N10276 N06022 N10675 | Chemical processing, pollution control, waste treatment, pharmaceuticals | Excellent resistance to pitting, crevice corrosion, and oxidizing acids |
| Monel® 400 | N04400 | Marine engineering, chemical equipment, hydrocarbon processing | Superior resistance to seawater, acid, and alkaline solutions |
| Inconel® 625 | N06625 | Aerospace, chemical processing | High strength, oxidation resistance, and fatigue tolerance |
| Super Duplex 2205 | S31803/S32205 | Offshore oil and gas, desalination plants, chemical tankers | High strength, excellent chloride stress corrosion cracking resistance |
| Super Duplex 2507 | S32750 | Subsea systems, flue gas desulfurization, high-pressure pipelines | Enhanced strength and corrosion resistance compared to 2205 |
| 6 Mo (S31254) | S31254 | Seawater cooling systems, pulp and bleaching plants, phosphoric acid en |
Acid handling systems
Waste treatment plants
Oil & Gas: Wellheads, pipelines, refineries, and storage facilities.
Chemical & Petrochemical: Handling corrosive fluids, acids, and high-temperature media.
Power Generation: Steam, water, and coolant systems in power plants.
Pharmaceutical & Food: High-purity fluid transfer (with certified materials and polish).
Marine & Offshore: Seawater-resistant applications (e.g., duplex stainless steel).
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