Duplex Steel Ball Valve

Manufacturer, Supplier & Exporter of Duplex Steel Ball Valve

Riddhi Siddhi Impex is a well-established and trusted manufacturer and supplier of Duplex Steel Ball Valves in India. Known for its high strength and excellent corrosion resistance, the Duplex Steel Ball Valve is extensively used in harsh industrial applications. These valves are engineered with high-grade Duplex Steel, typically UNS S31803 or S32205, which offers enhanced mechanical and corrosion-resistant properties compared to standard stainless steel grades.

The Duplex Steel Ball Valve is a quarter-turn valve that controls fluid flow with a hollow, perforated, and pivoting ball. Its unique design makes it suitable for both on/off and throttling applications in pipelines, especially where pressure and temperature conditions are extreme. Riddhi Siddhi Impex ensures precision manufacturing, using international standards like API, ASME, and ASTM to deliver reliable and long-lasting products.

These valves are ideal for various industries including oil & gas, petrochemical, marine, power generation, desalination, and pulp & paper. Duplex Steel’s high chromium, molybdenum, and nitrogen content ensures superior pitting and crevice corrosion resistance, especially in chloride-rich environments such as coastal and marine applications.

As a domestic supplier, Riddhi Siddhi Impex supplies Duplex Steel Ball Valves in leading Indian cities like Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, and Vadodara. Their wide distribution network ensures fast delivery, competitive pricing, and excellent technical support for both private and government sector projects.

Apart from these metros, the company also serves industrial belts and emerging cities like Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, Varanasi, Amritsar, Chandigarh, Mysuru (Mysore), Udaipur, Jodhpur, Visakhapatnam, Coimbatore, Madurai, Kochi, Thiruvananthapuram, and more. This pan-India presence makes Riddhi Siddhi Impex a reliable domestic supplier of Duplex Steel Ball Valves.

Specifications of Duplex Steel Ball Valve

Specification	Details
Product	Duplex Steel Ball Valve
Material Grade	Duplex Steel UNS S31803 / S32205
Size Range	1/2" to 12" (DN15 to DN300)
Pressure Rating	150# to 2500#
End Connection	Flanged, Socket Weld, Threaded, Butt Weld
Operation	Manual, Pneumatic, Electric Actuated
Design Standard	API 6D, ASME B16.34, BS EN ISO 17292

Chemical Composition of Duplex Steel (UNS S31803 / S32205)

Element	Composition (%)
Chromium (Cr)	21.0 – 23.0
Nickel (Ni)	4.5 – 6.5
Molybdenum (Mo)	2.5 – 3.5
Manganese (Mn)	≤ 2.0
Silicon (Si)	≤ 1.0
Carbon (C)	≤ 0.030
Nitrogen (N)	0.08 – 0.20
Iron (Fe)	Balance

Mechanical Properties

Property	Value
Tensile Strength	620 MPa (min)
Yield Strength	450 MPa (min)
Elongation	25% (min)
Hardness	≤ 290 HB

Dimension Chart (ASME B16.10)

Size (Inches)	Face-to-Face (mm)
1/2"	108
1"	127
2"	150
4"	229
6"	394
8"	457

Equivalent Grades

Standard	Grade
UNS	S31803 / S32205
WERKSTOFF	1.4462
EN	X2CrNiMoN22-5-3
AFNOR	Z2 CND 22-05 Az

Equivalent Standards

Standard	Specification
ASTM	A815 / A182
ASME	B16.34
API	6D / 598
BS	EN 10222-4

Other Types of Duplex Steel Valves

Type	Description
Duplex Steel Gate Valve	Ideal for straight-line flow and minimum restriction.
Duplex Steel Globe Valve	Used for throttling and frequent operation.
Duplex Steel Check Valve	Prevents backflow in pipelines.
Duplex Steel Butterfly Valve	Compact and suitable for large flow volumes.
Duplex Steel Needle Valve	Offers precise flow control.
Duplex Steel Plug Valve	Rotational motion valve for quick shut-off.

These valves are available in various end connections such as flanged, threaded, socket weld, and butt-weld, with manual, pneumatic, or electric actuation options. Clients can also request custom specifications including fire-safe design, anti-static features, and blowout-proof stem construction.

Frequently Asked Questions (FAQs)

Q1: What is a Duplex Steel Ball Valve used for?

A1: It is used in applications involving high pressure and corrosive environments like chemical plants, offshore drilling, and desalination systems.

Q2: What are the advantages of Duplex Steel over Stainless Steel?

A2: Duplex Steel has higher strength and better resistance to stress corrosion cracking compared to standard stainless steels like 304 or 316.

Q3: What end connections are available?

A3: End connections include flanged, threaded, socket weld, and butt weld depending on the requirement.

Q4: Does Riddhi Siddhi Impex supply valves across India?

A4: Yes, they are a domestic supplier across cities including Mumbai, Delhi, Chennai, Hyderabad, Bengaluru, and many more industrial hubs.