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Discover our high-performance forged steel double ball valves designed specifically for critical isolation in hydrotransport pipelines, mineral concentration plants, and high-pressure leaching circuits.
In modern extractive metallurgy, the demand for efficiency and safety has driven the adoption of Double Ball Valves (also known as Double Block and Bleed or DBB valves). Unlike conventional configurations, a double ball valve integrates two independent obturators (balls) within a single valve body, providing dual-barrier isolation. This design allows operators to block both upstream and downstream pressure while venting (bleeding) the cavity between them, verifying bubble-tight seal integrity without interrupting the system flow.
Whether handling copper concentrates, iron ore slurries, gold tailings, or sulfuric acid solutions in high-pressure acid leaching (HPAL) plants, these valves offer unparalleled safety. By reducing the footprint and weight of the piping system compared to installing two separate valves in series, SLVCN's integrated double ball valves minimize leakage paths and optimize plant layout space.
HPAL autoclaves operate under intense pressures (up to 50 bar) and extreme temperatures (over 250°C) using highly concentrated sulfuric acid to extract nickel and cobalt. Double ball valves made of exotic forged alloys (such as Titanium, Duplex, or Hastelloy) with metal-to-metal seating are essential to isolate the feed and discharge lines safely under these severe corrosive conditions.
Transporting mineral concentrates (e.g., copper, iron ore, coal) over long distances requires high-pressure pipelines. Slurries contain hard suspended solids that cause continuous impingement and erosion. Forged DBB trunnion-mounted ball valves with tungsten carbide coatings resist wear, maintaining reliable bubble-tight shut-off for years.
Managing toxic mining tailings requires absolute zero-leakage control to prevent environmental contamination. Double block and bleed ball valves provide a dual-barrier system that guarantees zero emissions. The integrated bleed port allows operators to flush out trapped particulate matter, preventing the solid buildup that typically jams standard valves.
With over 30 years of manufacturing experience, SLVCN is a professional designer and manufacturer of high-performance forged steel ball valves for critical industrial applications. We specialize in extreme working conditions including high pressure, high temperature, and cryogenic environments, providing safe and reliable flow control solutions for global industrial projects where operational reliability is non-negotiable.
Our core product range covers forged trunnion-mounted and floating ball valves, top-entry and side-entry ball valves, fully welded ball valves, metal seated ball valves, cryogenic ball valves, high-pressure ball valves up to Class 2500 (PN420) and customized higher pressure ratings, as well as high-temperature service valves. Compared with conventional cast valves, SLVCN forged valves feature higher material density, superior mechanical strength, improved resistance to pressure fluctuations and thermal shock, and significantly longer service life under severe service conditions.
Contact Our EngineersDesigned for High Pressure, High Temperature, and Cryogenic Applications, SLVCN valves are widely used in long-distance oil & gas transmission pipelines, LNG storage and regasification terminals, offshore platforms and deepwater projects, power plants, refineries, compressor stations, and high-pressure chemical processing units. Whether handling flammable media, corrosive fluids, sour service media (H₂S), ultra-low temperatures, or extreme differential pressures, our valves ensure stable operation, bubble-tight shut-off, and maximum system safety in accordance with international sealing and performance standards.
Safety and reliability are embedded in every design. Our forged ball valves are equipped with Double Block and Bleed (DBB) structures, anti-blowout stems, fire-safe designs in accordance with API 607 / API 6FA, anti-static devices, emergency sealing systems, and pressure-balanced seating structures suitable for high differential pressure operation. Valves can be designed with SPE (Single Piston Effect) or DPE (Double Piston Effect) seat configurations based on application requirements. For sour service environments, materials and sealing systems comply with NACE MR0175 / ISO 15156 requirements.
To ensure consistent quality, each valve undergoes a complete series of inspections and performance tests in accordance with API 6D, API 598, and ISO 5208, including shell test, seat leakage test (Rate A / zero visible leakage), fire-safe test, cryogenic test, operational torque test, dimensional inspection, and PMI material verification. SLVCN operates dedicated cryogenic testing facilities to validate valve performance at ultra-low temperatures down to −196°C.
SLVCN is certified to ISO 9001, CE, and API standards, and our products comply with API 6D, ASME B16.34, DIN, ANSI, and JIS specifications. We provide extensive customization capabilities covering sizes from 1/2” to 36”, full bore or reduced bore, special materials including A105, LF2, F11, F22, F51, Inconel, various soft and metal seat designs, and intelligent actuation with pneumatic, electric, and gear operators.
Pressure Tested
Every single valve undergoes rigorous hydrostatic and pneumatic tests before shipping.
Cryogenic Capability
Advanced testing labs to ensure low-temperature structural and sealing integrity.
Countries Served
Today, SLVCN serves customers in more than 100 countries and regions, supplying valves to EPC contractors, engineering companies, and end users across Europe, the Middle East, Southeast Asia, and the Americas.
Engineered for the demands of high-pressure pipelines, chemical processing, tailings, and cryogenic systems. Find the exact configuration for your project.
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