Hastelloy C276 Butterfly Valves

When standard alloys succumb to aggressive chemical attack, Falcon’s Hastelloy Butterfly Valves provide the definitive solution. Engineered for the most severe service conditions, these valves are designed to handle high-concentration acids, hot brine, and volatile chemical compounds without compromising structural integrity.

• Material Grades: Hastelloy C276, C22, and B3.

• Design Type: Double Offset and Triple Offset (for bubble-tight, metal-to-metal seating).

• Size Range: $2"$ to $48"$.

• Pressure Rating: ASME Class 150, 300, and 600.

• Temperature Range: Capable of withstanding cryogenic temperatures up to $+450^{\circ}C$ (depending on seal selection).

• Body Styles: Wafer, Lug, and Flanged.

• Superior Acid Resistance: Outstanding performance in phosphoric acid, sulfuric acid, and hydrochloric acid environments.

• Pitting & SCC Resistance: Virtually immune to Chloride Stress Corrosion Cracking (SCC) and localized pitting in stagnant brine.

• High Strength-to-Weight: Maintains mechanical properties at elevated temperatures where other materials soften.

• Precision Sealing: Available with PTFE, reinforced PTFE, or Stellite-faced metal seats for severe cycle applications.

• Chemical Processing: Reactive media and aggressive catalyst handling.

• Flue Gas Desulfurization (FGD): Handling highly acidic scrubber slurries.

• Pharmaceuticals: High-purity, corrosive batch processing.

• Specialized Desalination: Concentrated, high-temperature brine discharge.

Our Hastelloy Butterfly Valves are engineered to solve the "friction problem" found in standard valves. We specialize in two high-performance geometries:

• Double Offset (High Performance): * The shaft is offset from the centerline of the disc and the seat.

  • Benefit: This creates a "cam-action" that lifts the disc off the seat quickly, reducing friction and extending the life of PTFE or reinforced seats in brine service.

• Triple Offset (Zero Leakage / Severe Service): * Incorporates a third offset—the geometry of the seating surface itself (a conical shape).

  • Benefit: This allows for metal-to-metal seating with no rubbing during travel. It provides a bubble-tight, bi-directional shutoff even at high temperatures and high pressures where soft seats would fail.

Falcon maintains a rigorous Quality Management System (QMS) to ensure every valve can withstand the aggressive nature of Hastelloy-specific applications.

• Design Standards: API 609, ASME B16.34, and BS EN 593.

• Material Traceability: 100% traceability of all pressure-retaining parts (Body, Disc, Stem) with EN 10204 3.1 or 3.2 Certificates.

• NACE Compliance: All Hastelloy valves are manufactured to meet NACE MR0175/ISO 15156 for resistance to sulfide stress cracking in sour oil and gas environments.

• Wall Thickness: Strict adherence to ASME B16.34 to ensure safety margins under high-pressure brine surges.

Before any Falcon valve leaves our facility, it undergoes a series of mandatory and optional "Severe Service" inspections:

• Shell Test: Hydrostatic testing at $1.5 \times$ the rated pressure to ensure body integrity.

• Seat Leakage: High-pressure hydro and low-pressure pneumatic testing to verify zero-leakage performance.

• Backseat Test: Verification of the stem seal integrity.

"Beyond the Metal." While many can cast specialty alloys, Falcon masters the machining and sealing of Hastelloy. Because Hastelloy work-hardens quickly, our specialized CNC machining processes ensure that the critical sealing faces of our Triple Offset valves achieve the exact conical geometry required for a 100% bubble-tight seal in acidic brine.