Alloy 20 Valve Manufacturer in India

Alloy 20 Valve can be used for corrosive process services wherein resistance against sulfuric acid, phosphoric acid, chlorides, pitting and stress corrosion cracking is required. Specialty Valve offers Alloy 20 Valve in situations that require material compatibility and good pressure retaining capacity. Selection of Alloy 20 Valve Manufacturer in India must take into consideration the valve type, corrosion situation, pressure, temperature, and standards.

What Is an Alloy 20 Valve Used For?

Alloy 20 valves are usually preferred in the case where corrosive materials have to be handled, particularly in the case where sulfuric acid resistance is required. This is because the elements of copper and molybdenum in the alloy resist sulfuric acid and pitting corrosion, while the presence of nickel and chromium resists corrosion in general.

Alloy 20 Valve Product Range:

The product category includes:

Alloy 20 Ball Valve: Tight shut-off for corrosive process lines
Alloy 20 Butterfly Valve: Compact flow isolation for larger pipelines
Alloy 20 Check Valve: Automatic protection against reverse flow
Alloy 20 Gate Valve: Isolation with low flow restriction when fully open
Alloy 20 Globe Valve: Throttling and controlled flow regulation.

Alloy 20 Valve Dimensions, Ratings and Materials:

Parameter	Technical Details
Material	Alloy 20
UNS Grade	N08020
Werkstoff Number	2.4660
Cast Grade	ASTM A351 CN7M
Size	½″ to 24″, configuration dependent
Pressure Class	Class 150 to Class 1500, configuration dependent
PN Rating	PN16 to PN25 and application-specific ratings
Body and Bonnet	Alloy 20
Trim	Alloy 20 or compatible corrosion-resistant alloy
Seat Options	PTFE, reinforced PTFE, metal seat
End Connections	Flanged, Butt Weld, Socket Weld, Threaded
Operation	Handwheel, Gear, Pneumatic, Electric
Design Standards	ASME B16.34, API 600, API 603, API 602
Testing Standards	API 598, ISO 5208
Face-to-Face	ASME B16.10
Flange Standard	ASME B16.5
Butt Weld Standard	ASME B16.25

What Makes Alloy 20 Suitable for Corrosive Media?
Nickel in the alloy is present in an amount of 32 to 38%, whereas chromium in the alloy is present in an amount of 19 to 21%. Molybdenum in this alloy is present in an amount of 2 to 3% and copper in an amount of 3 to 4%. The presence of copper increases the resistance of alloy to sulfuric acid.
Quality Control and Testing
Quality control can include material verification, dimensional inspection, pressure testing, seat leakage testing, functional checks and inspection of critical corrosion-resistant surfaces. Chemical composition and material traceability are particularly important for Alloy 20 valve manufacturing.
Testing can be performed according to applicable API 598, ISO 5208 and project requirements, with inspection documentation and material certificates provided where specified.
Performance Advantages of Alloy 20 Valve:
High resistance to sulfuric acid
Good resistance to pitting and crevice corrosion
Resistance to chloride stress corrosion cracking
Suitable for aggressive chemical media
Good mechanical strength
Suitable for welded construction
Corrosion-resistant body and trim options
Multiple pressure and connection configurations
Industrial Services for Alloy 20 Valve:
Alloy 20 valve is used in:
Chemical Processing
Sulfuric Acid Production and Transfer
Petrochemical Processing
Chemical Storage and Transfer
Mining and Mineral Processing
Industrial Corrosive Fluid Systems
How to Choose an Alloy 20 Valve?
The selection criteria will include valve type, type of medium being processed, acid concentration, chloride concentration, operating temperature, pressure classification, valve size, grade of Alloy 20, seat material, trim, end connection, operation method, and design standards. In the case of corrosive fluids, it is crucial to consider all conditions of pressure and temperature.