Manufacturer, Supplier & Exporter of Super Duplex Steel Check Valve

Super Duplex Steel Check Valve is a highly durable and corrosion-resistant valve designed for critical applications where reverse flow prevention is essential. Manufactured and supplied by Riddhi Siddhi Impex, a leading name in industrial valves, this valve combines the superior mechanical properties of super duplex stainless steel with advanced valve engineering. The valve is widely used in industries such as oil and gas, chemical processing, water treatment, and power generation due to its outstanding resistance to chloride stress corrosion cracking and excellent strength.

Riddhi Siddhi Impex specializes in producing high-quality Super Duplex Steel Check Valves that meet stringent international standards. These valves are fabricated from UNS S32750 and S32760 grade materials, ensuring exceptional toughness and longevity even in highly aggressive environments. The superior metallurgy of super duplex steel provides excellent resistance to pitting, crevice corrosion, and erosion, making it ideal for harsh conditions commonly found in offshore and petrochemical industries.p>

The check valve design from Riddhi Siddhi Impex features a robust disc and seat arrangement, which ensures reliable sealing and prevents backflow effectively. The valve operates automatically, allowing fluid flow in one direction and closing instantly to avoid any reverse flow that could damage equipment or disrupt operations. This is crucial in pipelines, pumping systems, and process lines where maintaining unidirectional flow is critical..

Riddhi Siddhi Impex’s Super Duplex Steel Check Valves are available in various types, including swing check, lift check, and wafer check valves, each suited to specific application requirements. Swing check valves provide a simple yet effective mechanism for fluid control, while lift check valves are preferred where rapid closing is necessary. The wafer design offers compactness and easy installation between flanges, optimizing space and maintenance convenience.

Supplying across major Indian cities like Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, and many others, Riddhi Siddhi Impex ensures timely delivery and local support. Their strong distribution network covers tier-2 and tier-3 cities including Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru, Udaipur, Jodhpur, and coastal hubs like Kochi and Visakhapatnam, ensuring accessibility of premium valves nationwide..

Super Duplex Steel Check Valve Specifications

Specification	Details
Material Grade	Super Duplex Stainless Steel UNS S32750 / S32760
Body Type	Swing Check, Lift Check, Wafer Check
Size Range	1/2" to 24" (Custom sizes available)
Pressure Rating	Class 150, 300, 600, 900, 1500
Connection Type	Flanged, Butt Weld, Threaded
Operating Temperature	-50°C to 300°C
Standards Compliance	API 6D, API 594, ASME B16.34, ASTM A182

Chemical Composition (%)

Element	Typical Composition
Chromium (Cr)	24-26%
Nickel (Ni)	6-8%
Molybdenum (Mo)	3-5%
Nitrogen (N)	0.14-0.20%
Manganese (Mn)	1.2% max
Carbon (C)	0.03% max
Iron (Fe)	Balance

Mechanical Properties

Property	Value
Yield Strength	450 - 550 MPa
Tensile Strength	750 - 900 MPa
Elongation	25% minimum
Hardness	≤ 95 HRB
Impact Strength (Charpy V-notch)	> 100 J at room temp

Dimension Chart (Typical)

Nominal Size (inches)	Face to Face (mm)	Flange Diameter (mm)	Weight (kg)
1/2"	140	110	4
1"	165	135	6
2"	178	150	10
4"	229	210	23
6"	292	280	45

Equivalent Grades

Super Duplex Grade	Equivalent Grades
UNS S32750	SAF 2507, EN 1.4410, ASTM A182 F55
UNS S32760	SAF 2507, EN 1.4410, ASTM A182 F55

Equivalent Standards

Standard	Description
API 6D	Specification for Pipeline Valves
API 594	Check Valves: Flanged, Lug, Wafer and Butt-welding
ASME B16.34	Valves - Flanged, Threaded, and Welding End
ASTM A182	Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves

Other Types of Duplex and Super Duplex Valves

Valve Type	Description
Gate Valve	Used for on/off control, provides tight sealing
Globe Valve	Used for regulating flow, excellent throttling capability
Ball Valve	Quarter-turn valve for quick shutoff
Butterfly Valve	Lightweight valve suitable for large diameter pipes

Riddhi Siddhi Impex also provides customized valve solutions tailored to client-specific needs, such as special coatings, extended pressure ratings, and integration with automated actuation systems. This flexibility, combined with strict quality control and material traceability, has earned the company a reputable position as a trusted Super Duplex Steel Check Valve domestic supplier in India.

Frequently Asked Questions (FAQs)

Q1: What industries use Super Duplex Steel Check Valves?

A1: These valves are used extensively in oil & gas, petrochemical, marine, power plants, and chemical processing industries.

Q2: What are the main advantages of Super Duplex Steel in check valves?

A2: Super Duplex Steel offers superior corrosion resistance, high strength, excellent toughness, and resistance to chloride stress corrosion cracking.

Q3: Can Riddhi Siddhi Impex provide custom sizes and pressure ratings?

A3: Yes, they offer customized valve sizes, pressure ratings, and connection types to suit specific project requirements.

Q4: How does a check valve prevent backflow?

A4: The valve’s disc automatically closes when fluid reverses direction, preventing backflow and protecting downstream equipment.