Sulphuric Acid Service Valves

Falcon Sulphuric Acid Valves: Uncompromising Performance for Corrosive Environments Sulphuric acid (H₂SO₄) is one of the most widely used industrial chemicals, integral to processes across the Mining, Petrochemical, Steel, and Fertilizer industries. However, its highly corrosive nature presents significant challenges for valve integrity and operational safety. At Falcon Valves and Flanges Pvt Ltd., we specialize in designing and manufacturing a comprehensive range of Sulphuric Acid Valves engineered to excel in these demanding applications, ensuring long-term reliability and minimizing downtime.

Our extensive portfolio includes all types of valves – from ball and gate to globe, check, and butterfly valves – meticulously crafted to handle various concentrations and temperatures of sulphuric acid. The cornerstone of our offering lies in our precise material selection, leveraging advanced alloys to provide unparalleled corrosion resistance.

The Falcon Advantage: Superior Material Selection for Sulphuric Acid Service Choosing the right material is paramount for safe and efficient sulphuric acid handling. Falcon Valves offers valves manufactured from a range of high-performance alloys, each selected for its specific benefits in resisting sulphuric acid's corrosive effects:

1. SS316 (Stainless Steel 316):

Benefits: Stainless Steel 316 is a cost-effective and widely used austenitic stainless steel, offering good general corrosion resistance. It performs well in dilute sulphuric acid solutions and at lower temperatures. Its molybdenum content enhances its resistance to pitting and crevice corrosion.

Applications: Ideal for less aggressive sulphuric acid concentrations (up to 20% at ambient temperatures) and where moderate corrosion resistance is acceptable. 

2. SS904L (Stainless Steel 904L):

Benefits: SS904L is a super austenitic stainless steel known for its exceptional corrosion resistance, particularly in moderate to high concentrations of sulphuric acid and at elevated temperatures. Its higher content of chromium, nickel, and molybdenum, coupled with copper addition, significantly improves its resistance to uniform corrosion, pitting, and stress corrosion cracking in sulphuric acid environments. It outperforms SS316 in more aggressive conditions.

Applications: Highly recommended for concentrations up to 70% at moderate temperatures, and for various concentrations at ambient temperatures where superior resistance is required. Suitable for critical lines in fertilizer plants, pickling lines in steel mills, and various petrochemical processes.

3. Alloy 20 (Carpenter 20 / UNS N08020):

Benefits: Alloy 20 is a nickel-iron-chromium alloy with additions of molybdenum and copper, specifically designed for excellent resistance to sulphuric acid. It provides superior performance across a wide range of sulphuric acid concentrations and temperatures, including hot and moderately concentrated solutions. Its composition offers outstanding resistance to stress corrosion cracking, pitting, and crevice corrosion in sulphuric acid, as well as other aggressive acid.

Applications: A preferred choice for highly corrosive sulphuric acid applications, especially in the 20-50% range at boiling temperatures, or 85-95% concentrations at lower temperatures. Widely used in the fertilizer industry (e.g., phosphoric acid production), chemical processing, and pharmaceutical applications where robust acid resistance is critical.

4. Hastelloy C276:

Benefits: Hastelloy C276 is a nickel-molybdenum-chromium superalloy with excellent resistance to a wide range of severe corrosive environments, including very aggressive sulphuric acid concentrations, especially at high temperatures and in the presence of impurities or oxidizing agents. It offers exceptional resistance to pitting, crevice corrosion, and stress corrosion cracking. Its versatility makes it the material of choice when other alloys fail.

Applications: Reserved for the most challenging sulphuric service.