Hastelloy C276 Knife Gate Valves

Falcon Hastelloy C276 Knife Gate Valves

High-Performance Isolation for Corrosive & Abrasive Media

Falcon Hastelloy C276 Knife Gate Valves are specifically engineered for "Severe Service" where standard alloys (like 316SS) experience rapid degradation. By utilizing Alloy C276 (UNS N10276), these valves provide an industry-leading solution for handling aggressive chemical reactions, high-density slurries, and volatile industrial waste.

1. Engineered Design & Variations

Falcon offers a modular approach to knife gate design to match the specific needs of your piping system:

• Uni-Directional & Bi-Directional: Choose between standard uni-directional flow or bi-directional sealing for applications where backflow or vacuum conditions occur.

• The "Knife" Mechanism: The gate plate features a precision-tapered edge. This allows the valve to cut through settled solids, thick fibers, or scaling that would jam a standard wedge gate or ball valve.

• Body Configurations: Available in Wafer (lightweight/compact), Lug (for dead-end service), and Full Flanged designs to meet various structural requirements.

2. Technical Performance Ratings

Falcon valves are built to meet or exceed international industrial standards for pressure and temperature integrity.

Parameter	Capability
Size Range	2" (DN50) through 60" (DN1500)
Pressure Ratings	ASME Class 150 (PN10/16) up to Class 300
Material Build	Cast or Fabricated Hastelloy C276 Body & Gate
Seating Options	Metal-to-Metal (High Temp) or Resilient (PTFE/Viton for Bubble-Tight)
Packing Gland	High-cycle PTFE or Graphite packing for zero external leakage

3. Key Performance Features

• Superior Corrosion Resistance: Hastelloy C276 offers unmatched protection against pitting, stress-corrosion cracking, and oxidizing atmospheres up to 1900°F (1038°C).

• Non-Clogging Interior: The internal body is designed with a smooth flow path and no bottom cavities. This prevents "media buildup," ensuring the gate can always reach a full-closed position.

• Field-Replaceable Parts: Seats and packing are designed for easy maintenance, reducing downtime in critical process lines.

• Automation Ready: The heavy-duty yoke design allows for easy mounting of Pneumatic, Electric, or Hydraulic actuators without modifying the valve body.

4. Primary Industry Applications

Falcon C276 valves are the preferred choice for environments involving high chloride concentrations and acidic mixtures:

• Chemical Processing: Handling organic chlorides, sulfuric acid, and hydrochloric acid transfer lines.

• Marine & Offshore: Desalination plants and seawater cooling systems where salt-water corrosion is a constant threat.

• Pulp & Paper Mills: Used extensively in the bleach plant for chlorine dioxide and hypochlorite stages.

• Mining & Metal Refining: Acid leaching processes and high-solid tailing pipelines.

• Pollution Control: Flue Gas Desulfurization (FGD) systems where sulfuric acid condensation occurs.

Precision Manufacturing

• Surface Finish: The gate is ground to a mirror finish (typically 0.4 to 0.8 microns). This ultra-smooth surface reduces friction, extends the life of the packing, and prevents media from "sticking" to the gate.

• Hardened Seats: For abrasive slurries, we offer specialized hardening treatments on the C276 seats to prevent "washout" and ensure the seal remains tight over thousands of cycles.

• Zero-Defect Casting: Our Hastelloy bodies undergo rigorous NDT (Non-Destructive Testing), including Radiographic (X-ray) or Dye Penetrant testing, to ensure there are no internal porosities or micro-cracks.

 Testing & Sealing Standards

• MSS SP-81 Compliant: All valves are tested according to the Manufacturers Standardization Society (MSS) requirements for knife gate valves.

• Pressure Testing: Each unit undergoes a shell test at $1.5 \times$ the rated pressure and a seat leak test to ensure performance under actual field conditions.

• Packing Gland Quality: We utilize a multi-layer packing system