Duplex Check Valve

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Noah Tubefittings is a well-respected manufacturer and supplier located in Kinshasa, Congo, specializing in top-notch **Duplex Check Valves** that are built for outstanding performance, durability, and resistance to corrosion in tough industrial settings. These valves are expertly designed to facilitate one-way fluid flow while effectively preventing backflow, which helps maintain system efficiency and safety. Crafted from high-quality Duplex Stainless Steel, they boast remarkable mechanical strength and corrosion resistance, even in challenging environments with high chloride levels and pressure. Noah Tubefittings is committed to precision manufacturing, reliability, and longevity, making their Duplex Check Valves perfect for critical processes and instrumentation needs.

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The composition of Duplex Check Valves primarily includes chromium (22%), nickel (5–6%), and molybdenum (3%), with nitrogen added to boost strength and resistance to localized corrosion. They have a tensile strength of around 620 MPa and a yield strength of about 450 MPa. Thanks to their dual-phase (austenitic-ferritic) microstructure, these valves offer excellent protection against pitting, crevice corrosion, and stress corrosion cracking, along with impressive fatigue strength and thermal stability.

Duplex Check Valve Specifications

INSTRUMENTATION VALVES MATERIAL	DUPLEX 2205
INSTRUMENTATION VALVES SIZE	6 MM TO 50 MM and 1/8″ TO 2″
PATTERN FLOW	STRAIGHT
THREADS	BSPP, NPT, METRIC, BSPT,UNF, JIC
INSTRUMENTATION VALVES ORIFICE SIZE	2 MM – 40 MM
CONNECTION	SOCKET WELD END, TUBE END, THREADED, FLANGE END
INSTRUMENTATION VALVES BODY SHAPE	HEXAGON
EQUIVALENT BRANDS	PARKER, SWAGELOK, DK-LOK, STAUFF, OLIVER VALVES, HAMLET, HOKE
CRACKING PRESSURE	0.5 BAR
TYPE	SPRING TYPE, POPPET TYPE
RATING PRESSURE	20000 PSI, 1500 PSI, 10000 PSI, 3000 PSI, 6000 PSI, 15,000 PSI
MEDIA TEMPERATURE	(-50* C – 350*C ) AS PER PRESSURE RANGE
MEDIA	SEA WATER , HYDRAULIC AIR, OIL, GAS, WATER, HOT WATER , STEAM, COLD WATER , CHEMICAL
BODY TYPE	FORGED, BAR STOCK
INSTRUMENTATION VALVES PACKING DETAILS	WOODEN PALLET, BOX PACKING

Duplex Check Valve Chemical Composition

ELEMENT	DUPLEX 31803	DUPLEX 2205
C	0.030 max	0.030 max
NI	4.50 – 6.50	4.50 – 6.50
MN	2.00 max	2.00 max
S	0.020 max	0.20 max
FE	63.72 min	63.54 min
P	0.030 max	0.030 max
SI	1.00 max	1.00 max
MO	3.0 – 3.5	2.50 – 3.50
CR	22.0 – 23.0	21.0 – 23.0
N	0.14 – 0.20	0.08 – 0.20

Duplex Check Valve Mechanical Properties

Grade	Hardness(BHN)	UTS (MPa)	YS (MPa)	% Elongation
2205	293 max.	655 min.	450 min.	25 min.
31803	293 max.	620 min.	450 min.	25 min.

Top Duplex Check Valve Manufacturing Company in Kinshasa

At Noah Tube Fittings, we are the leading supplier, manufacturer, and exporter of Duplex Check Valves in Kinshasa, Congo. Our advanced manufacturing facilities, strategically located in the Congo, allow us to deliver high-quality, customized solutions tailored to your specific needs. With an extensive inventory of over 16,000 tons of premium-grade duplex stainless steel materials, we are fully equipped to meet your demands efficiently. Our commitment to excellence and efficiency ensures that we consistently maintain sufficient stock to support your business requirements and provide reliable performance in critical applications.

Types of Duplex Check Valve

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Duplex Check Valve Equivalent Grade

STANDARD	UNS	WERKSTOFF NR.
Duplex 2205	UNS S31803 / UNS S32205	1.4462 / 1.4462

Largest Manufacturer and Supplier of Duplex Check Valve in Kinshasa, Congo

Duplex Check Valves find extensive application across various industries, including oil and gas, petrochemical, marine, power generation, and chemical processing. They are particularly suited for pipelines, pumps, and hydraulic systems that deal with corrosive fluids or seawater. These valves guarantee reliable backflow prevention, smooth operation, and long-lasting durability even in extreme conditions. Their exceptional blend of strength, corrosion resistance, and ability to handle pressure makes them the go-to choice for critical flow control and safety applications.

We offer These Products as per DIN, ISO, JIS or ANSI Standard.

Duplex Check Valve Uses

Duplex Check Valves are widely used in various industries due to their exceptional strength and corrosion resistance. In the oil and gas sector, they prevent backflow and maintain system integrity in pipelines and processing plants. In chemical processing, these valves handle aggressive substances, ensuring safe flow control. They are also utilized in marine applications, providing reliable performance in seawater systems. Additionally, Duplex Check Valves find applications in water treatment facilities, power generation, and other high-pressure environments, where durability and reliability are essential for operational efficiency and safety.