Duplex Check Valve

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Paul Tube Fittings stands out as a top-notch manufacturer and supplier of high-quality Duplex Check Valves, proudly based in Houston, USA. Known for their precision engineering and remarkable durability, Paul Tube Fittings caters to a wide range of industries, including oil & gas, petrochemical, marine, and power generation. With a strong focus on innovation and customer satisfaction, the company guarantees that all their products meet rigorous international quality standards. Their Duplex Check Valves are expertly crafted for optimal flow control and corrosion resistance, making them a reliable choice for demanding operational environments both in the United States and around the globe.

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Typically, Duplex Check Valves are constructed from duplex stainless steels like UNS S31803 or S32205, which contain about 22% chromium, 5-6% nickel, 3% molybdenum, and nitrogen to boost strength and corrosion resistance. These materials create a balanced microstructure of austenite and ferrite, leading to impressive mechanical properties: a tensile strength of around 620 MPa, a yield strength of 450 MPa, and excellent impact resistance. Duplex alloys also show outstanding resistance to stress corrosion cracking, pitting, and crevice corrosion, making them perfect for tough environments and long service life.

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 Houston

At Paul Tube Fittings, we are the leading supplier, manufacturer, and exporter of Duplex Check Valves in Houston, USA. Our advanced manufacturing facilities, strategically located in the USA, 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 Houston, USA

Paul Tube Fittings is a leading supplier and stockist of premium Duplex Check Valves in Houston, USA. Our products are widely used across various industries, and we are dedicated to delivering exceptional service while ensuring complete customer satisfaction. With our advanced finishing techniques, we differentiate ourselves in the metal industry. We are committed to consistently providing top-quality Duplex Check Valves while efficiently meeting the diverse needs of our clients, ensuring reliability and durability in demanding applications.

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

Duplex Check Valve Uses

Duplex Check Valves find extensive use in industries where corrosion resistance and mechanical strength are vital. You’ll commonly see them in offshore and onshore oil & gas operations, chemical processing plants, desalination systems, marine engineering, and power generation units. These valves are specifically engineered to prevent backflow in high-pressure pipelines, ensuring that fluid flows in just one direction. Their durability and performance in extreme conditions make them ideal for handling aggressive media like seawater, acids, and other corrosive substances. In mission-critical systems, Duplex Check Valves are essential for maintaining system integrity and operational efficiency.