Duplex Check Valve

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Rudra Tubefittings, located in Kolkata, India, stands out as a top manufacturer and supplier of high-quality Duplex Check Valves, known for their reliability and durability in tough industrial settings. With a keen emphasis on precision engineering and strict adherence to international standards, Rudra Tubefittings guarantees that each Duplex Check Valve performs at its best and lasts a long time. These valves are specifically designed to prevent backflow in pipelines, protecting equipment and ensuring system efficiency. By merging cutting-edge manufacturing techniques with top-notch materials, the company has built a solid reputation as a trusted source for industries that need robust, corrosion-resistant, and efficient fluid control solutions.

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Typically, Duplex Check Valves are crafted from duplex stainless steel, which merges the high strength of martensitic steel with the corrosion resistance of austenitic steel. This blend usually contains around 22% chromium, 5–6% nickel, and 3% molybdenum, with nitrogen added to boost strength and resistance to pitting. The valves showcase impressive mechanical properties, including high tensile strength, yield strength, and toughness, along with exceptional resistance to stress corrosion cracking. These features enable duplex check valves to endure high-pressure and high-temperature environments while ensuring long-lasting reliability and minimal upkeep.

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 Kolkata

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

Rudra Tube Fittings is a leading supplier and stockist of premium Duplex Check Valves in Kolkata, Kolkata. 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 sectors like oil and gas, petrochemical, chemical processing, water treatment, and power generation. They are perfect for applications that require preventing reverse flow, protecting pumps and compressors, and maintaining the integrity of pipelines. These valves are well-suited for both corrosive and high-pressure fluid systems, providing reliable operation even in challenging conditions. Moreover, they are utilized in marine and offshore projects due to their outstanding resistance to seawater corrosion. Their durability, low maintenance needs, and capability to handle aggressive environments make them a go-to choice for many industries.