Manufacturer, Supplier & Exporter of Super Duplex Steel Gate Valve

Riddhi Siddhi Impex is a trusted manufacturer and domestic supplier of Super Duplex Steel Gate Valves in India, offering high-quality valves that meet demanding industrial requirements. These gate valves are engineered using high-performance Super Duplex grades such as UNS S32750 and UNS S32760, known for their exceptional mechanical strength and superior resistance to corrosion, particularly in aggressive and chloride-rich environments.

Super Duplex Steel Gate Valves are primarily used for on/off isolation in pipeline systems and are designed to offer minimum pressure drop across the valve. They feature a rising or non-rising stem and a bi-directional sealing mechanism that ensures leak-proof performance. These valves are widely applicable in industries like oil & gas, petrochemicals, marine, desalination, power generation, and chemical processing.

The high chromium, molybdenum, and nitrogen content in Super Duplex alloys gives the gate valves excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. This makes them ideal for seawater applications, offshore drilling platforms, and chemical storage tanks. Their dual-phase microstructure (ferritic-austenitic) also imparts remarkable durability under high pressure and temperature fluctuations..

Riddhi Siddhi Impex ensures that each valve adheres to international design standards such as API 600, ASME B16.34, and BS 1414, providing clients with quality assurance and compatibility with global projects. All valves undergo rigorous testing and inspection procedures including hydrostatic, pneumatic, and NDT testing to ensure reliable performance under tough service conditions.

As a domestic supplier, Riddhi Siddhi Impex delivers Super Duplex Steel Gate Valves to multiple cities across India, including but not limited to Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, Vadodara, Rajkot, Indore, Bhopal, Jaipur, and Coimbatore. The company offers quick lead times and customizable solutions in terms of valve sizes, pressure ratings, and connection types.

Super Duplex Steel Gate Valve

Specifications

Parameter	Details
Material Grade	Super Duplex Stainless Steel (UNS S32750 / S32760)
Valve Type	Gate Valve (Rising or Non‑Rising Stem)
Size Range	½" to 24" (DN15 to DN600) (typical, custom sizes available)
Pressure Class	150#, 300#, 600#, 800#, 1500#, 2500#
End Connections	Flanged, Butt Weld, Socket Weld, Threaded
Standards	API 600, ASME B16.34, BS 1414, ISO / API 598 (testing)
Operation	Handwheel, Gear, Pneumatic / Electric Actuation

Chemical Composition

Element	Min (%)	Max (%)
Chromium (Cr)	24.00	26.00
Molybdenum (Mo)	3.00	5.00
Nickel (Ni)	6.00	8.00
Nitrogen (N)	0.20	0.32
Carbon (C)	—	0.030
Manganese (Mn)	—	1.20
Silicon (Si)	—	0.80
Phosphorus (P)	—	0.035
Sulfur (S)	—	0.020
Iron (Fe)	Balance

Mechanical Properties

Property	Value
Tensile Strength	750 – 895 MPa (typical) :contentReference[oaicite:0]{index=0}
Yield Strength (0.2% offset)	550 MPa (typical) :contentReference[oaicite:1]{index=1}
Elongation	≥ 25% :contentReference[oaicite:2]{index=2}
Hardness (Brinell)	≤ 290 HB (approx.) :contentReference[oaicite:3]{index=3}

Dimension Chart (Sample for Gate Valve Class 150 / 300)

Size (Inches)	Face-to-Face (mm)	Flange OD (mm)	Weight (kg)
2"	178	152	12
4"	229	229	35
6"	267	279	60
8"	292	343	95

Equivalent Grades & Standards

Standard / Code	Equivalent Grade / Spec
UNS	S32750 / S32760 :contentReference[oaicite:4]{index=4}
WERKSTOFF / EN / DIN	1.4410 / X2CrNiMoN22-5-3 :contentReference[oaicite:5]{index=5}
ASTM / ASME	A351, A182 (for cast / forged super duplex) :contentReference[oaicite:6]{index=6}

Other Valve Types in Super Duplex Steel

Type	Applications / Description
Ball Valve	Quarter-turn shut-off valve for fast operation
Globe Valve	Throttling and flow regulation valve
Check Valve	Prevents backflow in piping systems
Butterfly Valve	Lightweight and compact flow isolation
Plug Valve	Rotational plug design for isolation or throttling
Needle Valve	Fine control in small bore piping

Whether it’s flanged, threaded, socket weld, or butt weld end connections, Riddhi Siddhi Impex provides versatile Super Duplex Gate Valve configurations suitable for diverse piping systems. Sizes typically range from ½” to 24” with pressure classes ranging from 150# to 2500#. Valves can also be provided with accessories like handwheels, actuators, gear operators, or electric control systems.

Frequently Asked Questions (FAQs)

Q1: What industries typically use Super Duplex Gate Valves?

A1: Industries such as oil & gas, petrochemical, desalination, offshore platforms, chemical processing, and marine systems especially where resistance to chloride corrosion is essential.

Q2: What is the maximum operating temperature?

A2: Depending on design, super duplex valves often handle up to ~232 °C (with PTFE) or ~371 °C (with graphite / Grafoil seals) :contentReference[oaicite:7]{index=7}

Q3: AreSuper Duplex Gate Valves available with actuation?

A3: Yes, these valves can be supplied with manual, gear, pneumatic, or electric actuation per client requirements.

Q4: Do you supply Super Duplex Gate Valves domestically in India?

A4: Yes. Riddhi Siddhi Impex supplies Super Duplex Gate Valves across Indian cities including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, and many more industrial hubs.