NARI Valves™ offers a wide range of ball valves manufactured to meet your requirements, from single-unit special designs to mainline project supply, in an extensive range of materials from Carbon, Stainless, Duplex, and Inconel alloy to Titanium.
Our range of Cryogenic and High-temperature ball valves is extensive with API DIB-1, DIB-2 & DBB designs.
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Floating balls to Trunnion balls,
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Side entry to Top entry,
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3 and 4-way Diverter ball valves,
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Buried gas transmission,
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PIG valves for launching and receiving.
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Subsea.
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SPECIFICATIONS
Various international piping codes have evolved within the industry to control the product quality level, such as:
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ASME B31.4 - Pipeline Transportation Systems for Liquid Hydrocarbons and Other Liquids
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ASME B31.8 - Gas Transmission and Distribution Piping Systems
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ASME B31.11 - Slurry Transportation Piping Systems
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ASME B31.12 - Hydrogen Piping and Pipelines
Different applications demand different valve types.
Find the ideal valve for your needs with NARI Valves™.
BALL VALVES
Ball valves are 90-degree quarter-turn rotary valves suited for high volume, high pressure, and high flow rates.
Available to API 6D, API 608, API 6A, ASME B16.34, ANSI, MSS SP-72, DIN & JIS standards, with API 6DSS and 17H for subsea/subsurface
FLOATING BALL VALVES
TRUNNION BALL VALVES
BUTTERFLY VALVES
Butterfly valves or metal discs mounted on rotating shafts with a 90-degree quarter-turn operation are mainly used for throttling. They are supplied with or without polymer lining and double-flanged lugged or wafer types available to an ASME/API 609/MSSSP-67 and MSS SP-68. Options also include concentric on and off eccentric for throttling duty, double or triple offset for high-performance throttling, forged or cast options, and carbon, steel, stainless steel, duplex and super duplex steel, bronze, nickel, and titanium options.
GATE VALVES
Low fluid resistance: Because of the linear, vertical motion that the gate travels in, the flow of the medium doesn't change direction when the valve is open or closed. This means that fluid turbulence is minimised and only results in a small pressure drop across the valve. Wedge gate, Expanding gate, Through Conduit gate, Slab gate, Single Expanding gate and Double Expanding gate Valves are a major part of our business. Rotary gate valves are supplied for hydraulic and chemical injection systems.
Sizes covered: 1” to 42” for API 6D and 1.13/16” to 13.5/8” for API 6A. ANSI Pressure Class ranges from 150 to 4500 lbs and API 6A from 3000 to 20000 psi. Valves can be supplied with manual or actuator operated.
SLAB GATE VALVES
API 600: cast carbon and alloy valves
API 603: stainless steel valves
API 602/BS 5352: forged valves
INSTRUMENT VALVES
Instrument valves are used in instrument measurement applications with different bore sizes, typically ranging between 5mm and 10mm. They are used for isolation, venting, block and bleed, static pressure, absolute pressure, gauge pressure, differential pressure, liquid level, and instrument lines. They can be lever-operated or automated. Available options include single Isolation, manifolds, mono flange, double block and bleed, and cryogenic.
They are available with various end connections, including NPT, BSP, welded, or flanged.
INSTRUMENTATION NEEDLE & BALL VALVES
GLOBE VALVES
Globe valves are used primarily for flow control, with T, angle, and Y-type designs. The T type is the most common type for a globe valve. The angle type allows fluid to flow in a single 90-degree turn, and the Y type is an alternative where high-pressure drop is required. Options also include plug, disc, cage, satellite, and bellow sealed valves.
Available to API 600, API 602, and API 623 standards, with various configurations.
CHECK VALVES
Check valves prevent backflow with their uni-directional operation and come in different configurations: inline piston, nozzle non-slam, lift, and swing style options.
Available to API 602, API 594, and API 6D standards.
PLUG VALVES
Plug valves are quarter-turn manual motion valves for flow control. Their style options include lubricated, non-lubricated, expandable, and eccentric. They offer on-off, diverting, as well as basic moderate throttling services. Available styles include lubricated, sleeved, and dual-expanding API 6D and API 599.
SUBSEA VALVES
Subsea valves regulate or isolate process flow within submerged pipelines and other equipment typically employed in oil and gas transportation. These valves are engineered to endure higher external pressure, saltwater corrosion, and extremely low temperatures. They undergo rigorous testing to ensure utmost reliability and adhere to API 6A, API 6DSS, and API 17D standards. Material selection is critical due to the risk of hydrogen embrittlement necessitated by cathodic protection requirements. Commonly used materials include A350 LF2, A182 F316, A182 F51, and A182 F55, meeting NACE standards for resistance to sulphide stress cracking in oilfield pipeline valves.
CONTROL BALL VALVES
The Side Entry design is the prevalent choice for Ball valves across the upstream, midstream, and downstream sectors of the oil and gas industry. Its versatile application extends to onshore LNG plants, offshore FLNG facilities, onshore production sites, refining and petrochemical plants, onshore treatment facilities, offshore platforms and FPSOs, power generation plants, hydropower installations, and desalination services. Engineered with a specific focus on mitigating high-pressure drops, it effectively reduces the adverse effects of cavitation and noise in high-pressure systems. Precision control is enhanced by substituting cages, enabling superior flow characteristics.
