Nai Lok Alloy 625 Uns N06625 ASTM A182 1500lb RF Dbb Ball Valve Double Block and Bleed Needle Type SBB Dbb Valve ASME B16.5

Product Description

Product Description

 

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.

Nickel valve applications: high concentration of alkali and reducing media

Monel® applications: sulfite, phosphoric acid, thermal soda, high temperature halogen and reductive media

Hastelloy® applications: hydrochloric acid, sulfuric acid, formic acid, phosphoric acid, organic acid, etc

Product Parameters

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 Options

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

Application

• 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).

Detailed Photos