Super Duplex Valve Manufacturer in India

The super duplex valve is known for its excellent mechanical strength as well as resistance to chloride and corrosion. Super duplex valves are manufactured by Speciality Valve for applications of isolation, flow control, and non-return services.Choosing a Super Duplex Valve Manufacturer in India involves considering pressure, temperature, fluid characteristics and valve function.

Super Duplex Valve Types:

The current product category includes:

Super Duplex Ball Valve: Quarter-turn isolation valve for use in high pressure and corrosive pipeline applications.
Super Duplex Butterfly Valve: Compact isolation and flow control valve for large size pipelines.
Super Duplex Check Valve: An automatic valve to prevent reverse flow.
Super Duplex Gate Valve: Pipeline isolation valve with minimum flow restriction when fully open.
Super Duplex Globe Valve: Flow controlling valve.
Super Duplex Knife Gate Valve: Fluid isolation valve for fluids with suspended solids.

Super Duplex Valve Specifications and Standards:

Parameter	Technical Details
Material	Super Duplex Stainless Steel
Common Grades	UNS S32750, UNS S32760, F53, F55, F61
2507 Grade	UNS S32750, EN 1.4410
Forged Material	ASTM A182 F53
Cast Material	ASTM A995 Grade 4A, 5A, 6A
Size	DN10 to DN1200, configuration dependent
Pressure Class	Class 150 to Class 2500
PN Rating	PN10 to PN450
Body Material	Super Duplex and specified corrosion-resistant alloys
Trim	Stainless Steel, Duplex, Super Duplex, Stellite and nickel alloys
Seat	Metal or application-specific soft seat
Packing	Graphite, PTFE
End Connections	Flanged, Butt Weld, Socket Weld, Threaded, Wafer, Lug
Operation	Handwheel, Gear, Lever, Pneumatic, Electric
Design Standard	ASME B16.34 and applicable valve standard
Flange Standard	ASME B16.5
Testing	API 598, ISO 5208

Super Duplex Valve Materials:

Body: Super Duplex, Duplex F51, Stainless Steel or compatible corrosion-resistant alloy
Trim: Super Duplex, Duplex F51, SS316 or suitable nickel alloy
Stem: Super Duplex, Duplex or nickel alloy
Seat: Metal, PTFE or application-specific material
Packing: Graphite, PTFE or suitable chemical-resistant material
Gasket: Graphite, PTFE or compatible sealing material

The component materials should be matched to the valve design and service conditions.

Which Super Duplex Grade Is Used?

UNS S32750 / F53 / EN 1.4410: Super Duplex 2507 with high strength and superior chloride resistance.
UNS S32760 / F55: Offers strong resistance against pitting, crevice and stress corrosion cracking.
F61: Suitable for applications where corrosion and mechanical strength are both important.

Choice of grade should be based on chlorine content, temperature, pressure, corrosion conditions and mechanical stresses.

What Are the Advantages of Super Duplex Valve?

The advantages of Super Duplex Valve are as follows:
High mechanical strength for demanding pressure applications
Excellent corrosion resistance in aggressive process environments
Strong resistance to pitting and crevice corrosion
High resistance to chloride stress corrosion cracking
Suitable for seawater and brine service
Good durability under demanding operating conditions
Suitable for high-pressure fluid-handling systems
Quality Control and Testing:
Quality Control is done through the process of material confirmation, verification of the chemical composition of material, dimension test, material tracing, hardness tests, hydrostatic body test, seat leakage test and functionality check.
Extra testing can be done through non-destructive examination, metallurgical confirmation and material certification depending on the design of the valve. The tests can be done under API 598, ISO 5208.
Where Is Super Duplex Valve Used?
Super duplex valve is commonly used in:
Oil and Gas
Chemical Processing
Marine and Offshore
Desalination and Water Treatment
Power Generation
Super Duplex Valve Construction and Sealing:
Body and Bonnet: Super duplex stainless steel as per pressure, temperature and process parameters.
Trim: Stainless steel, duplex, super duplex or similar corrosion resistant material.
Seat: Metal or engineered soft seat material based on application criteria.
Stem and Shaft: Super duplex, duplex or application-specific stainless steel.
Packing: Graphite, PTFE or other compatible material.
End Connection: Flanged, butt weld, socket weld, wafer, lug or thread style.
Service Considerations: Wetted components are selected for corrosion resistance, pressure, temperature, erosion and fluid compatibility.
Important Parameters for Super Duplex Valve:
The final design should be tailored for the valve type, alloy type, fluid composition, chloride exposure, temperature, pressure, pressure rating, size, trimming, seating material, packing, end connections, and mode of operation. The examination of the operating environment would enable us to determine the right combination of anti-corrosion properties, strength, sealing ability, and pressure containment.