Falcon Valves & Flanges Pvt Ltd

Andheri East, Mumbai, Maharashtra

Falcon Knife Gate Valves: Severe Service & Special Alloy Solutions

Falcon manufactures a comprehensive range of high-performance Knife Gate Valves engineered to isolate flow in the most demanding industrial environments. Designed for reliability and longevity, our valves are specifically built to handle abrasive slurries, viscous fluids, and corrosive media where standard valves fail.

Core Applications

• Slurry & Solids: Featuring a precision-ground sharp edge, our gates effortlessly cut through suspended solids, heavy slurries, pulp, and dry bulk materials, preventing clogging and ensuring positive shut-off.

• Acidic & Corrosive Media: We utilize specialized metallurgy to resist aggressive chemical attack in chemical processing, mining, and wastewater treatment plants.

• High Temperature & Pressure: Engineered with robust body designs and high-performance sealing systems (such as graphite or metal-to-metal seats) to withstand extreme thermal cycling and elevated system pressures.

Special Material Grades

We specialize in manufacturing valves from exotic and high-performance alloys to meet specific process requirements:

• Standard Grades: Cast Iron, Ductile Iron, WCB, SS 304, SS 316.

• Special Alloys:

  • Duplex & Super Duplex Stainless Steel: For superior strength and pitting resistance in marine and chloride environments.

  • Hastelloy (C-276, etc.): For extreme resistance to strong acids and reducing agents.

  • Alloy 20: Specifically for sulfuric acid applications.

  • Inconel & Monel: For high-temperature and severe corrosive services.

  • Titanium: For critical oxidative service.

Key Features

• Design Standards: Conforming to MSS SP-81 and other international standards.

• Seating Options: Available in Metal-to-Metal (Hard Faced), EPDM, Viton, PTFE, and High-Temp Graphite to suit the media.

• Operation: Manual (Handwheel/Chain Wheel), Pneumatic, Hydraulic, or Electric Actuation.

• Customization: Full port design to minimize pressure drop and hardened gate options for abrasion resistance.

Falcon Knife Gate Valves: Engineered for the Extreme

In industries where flow control failures can cost millions in downtime, Falcon delivers certainty. We don’t just manufacture valves; we engineer robust isolation solutions designed to withstand the harshest abrasive slurries, corrosive acids, and extreme thermal environments.

When standard valves fail, Falcon performs.

Why Choose Falcon? The 3 Pillars of Performance

1. Unmatched Material Expertise (The Falcon Specialty) We understand that "one size fits all" does not apply to severe service. Our foundry and engineering teams specialize in Exotic Metallurgy. While others stop at Stainless Steel, we excel in casting and machining rare alloys to combat specific types of corrosion and abrasion.

• For Acids: Hastelloy C-276, Alloy 20, and Titanium.

• For Sea Water/Chlorides: Duplex (2205) and Super Duplex (2507) Stainless Steel.

• For High Heat: Inconel 600/625 and Monel 400.

2. Zero-Clog Design for Solids & Slurries Our Knife Gate Valves feature a precision-beveled gate edge that acts like a guillotine. It cuts through heavy pulp, viscous fluids, and dry solids, clearing the seat area during closing to ensure a bubble-tight shutoff every time.

• Result: No jamming, no wedges, and significantly reduced maintenance intervals.

3. Built for High Pressure & Temperature Standard knife gates often leak under high stress. Falcon valves are reinforced with heavy-duty bodies and high-performance packing glands, rated for high-pressure classes and temperatures exceeding 600°C (depending on material selection).

Quality Assurance & Standards

Every Falcon valve undergoes rigorous testing before shipment.

• Design Compliance: MSS SP-81 / API 609.

• Testing: Hydrostatic and Pneumatic testing per API 598.

• Traceability: Full material certification (MTC) provided for every component

Falcon Inconel 617 Knife Gate Valves

Advanced Thermal Stability & High-Temperature Oxidation Resistance

Falcon Inconel 617 Knife Gate Valves are engineered for the most extreme thermal environments in the industrial world. Utilizing Alloy 617 (UNS N06617)—a nickel-chromium-cobalt-molybdenum alloy—these valves are designed to maintain mechanical integrity and resist deformation at temperatures where standard stainless steels and even other nickel alloys would lose their structural shape.

1. The Inconel 617 Advantage

The addition of Cobalt and Molybdenum provides Inconel 617 with a unique set of properties:

• High-Temperature Strength: Exceptional resistance to "creep" (deformation under constant stress) at temperatures exceeding $980^circtextC$ ($1800^circtextF$).

• Oxidation Resistance: The high chromium and aluminum content forms a protective scales that resists oxidation and carburization in high-heat cycles.

• Corrosion Resistance: Highly effective in a wide range of gaseous oxidizing and reducing environments.

• Metallurgical Stability: Remains stable during long-term exposure to high heat, preventing the valve components from becoming brittle.

2. Specialized High-Heat Design Features

• Thermal Expansion Engineering: The body and gate clearances are precision-calculated to allow for thermal expansion without seizing, ensuring the valve operates smoothly at both ambient and peak process temperatures.

• Solid Alloy Construction: Falcon uses solid Inconel 617 for the gate and critical seating areas to ensure uniform thermal performance.

• High-Temp Packing & Sealing: Outfitted with specialized graphite-based or metallic-reinforced packing systems rated for extreme thermal service.

• Heavy-Duty Bolting: Utilizes compatible high-strength fasteners to prevent "thread galling" or loosening during extreme temperature fluctuations.

3. Technical Specifications

Parameter	Specification Details
Material Grade	Inconel 617 (ASTM B166 / UNS N06617)
Primary Elements	Nickel (52%), Chromium (22%), Cobalt (12%), Molybdenum (9%)
Temperature Limit	Up to $1100^circtextC$ ($2000^circtextF$)
Pressure Class	ASME B16.34 Class 150, 300, and 600
Standard Testing	API 598 (High-Pressure Shell & Seat)
End Connections	Flanged, Buttweld, or Lugged

4. High-Stakes Industrial Applications

Falcon Inconel 617 valves are typically specified for:

• Power Generation: High-temperature components in ultra-supercritical coal plants and gas turbine exhaust systems.

• Petrochemical Catalysts: Handling hot, abrasive catalyst slurries in FCC (Fluid Catalytic Cracking) units.

• Aerospace & Defense: Ground support equipment and test stands for rocket and jet engine components.

• Thermal Processing: Industrial furnaces, heat-treating muffles, and high-temperature chemical reactors.

• Hydrogen Production: High-temperature steam reforming processes.

Quality & Precision Testing

Because Inconel 617 is often used in safety-critical high-heat zones, Falcon provides:

1. High-Temperature Simulation Testing: Verification of valve torque and sealing at elevated temperatures.

2. Full Chemical Analysis: PMI testing to ensure the critical 12% Cobalt content is present for high-temp strength.

3. Ultrasonic Testing (UT): Conducted on the body and gate to ensure zero internal defects or inclusions in the alloy.

4. Creep Testing Documentation: Available upon request to verify the material's long-term performance under stress.

Technical Comparison: Inconel 625 vs. Inconel 617

Selecting the correct grade ensures that the valve does not suffer from either Corrosion (failure of 617 in acid) or Creep (structural sagging of 625 in extreme heat).

1. Primary Design Intent

Feature	Inconel 625 (The Corrosion Guard)	Inconel 617 (The Heat Titan)
Main Alloying Elements	Nickel + Chromium + Niobium	Nickel + Chromium + Cobalt
Primary Strength	Resistance to pitting and acids.	Resistance to "Creep" and sagging at heat.

Falcon Inconel 825 Knife Gate Valves

Advanced Resistance to Sulfuric Acid and Stress Corrosion Cracking

Falcon Inconel 825 Knife Gate Valves are engineered for aggressive chemical processing and oil and gas applications where resistance to both oxidizing and reducing acids is required. Utilizing Alloy 825 (UNS N08825), these valves provide exceptional stability against sulfuric and phosphoric acids, as well as chloride-induced stress corrosion cracking.

1. The Inconel 825 Advantage

The specific balance of Nickel, Iron, and Chromium, with additions of Molybdenum and Copper, gives Inconel 825 unique properties:

• Sulfuric Acid Resistance: Excellent performance in sulfuric acid environments at various concentrations and temperatures.

• Chloride Immunity: The high nickel content provides nearly total immunity to chloride-ion stress-corrosion cracking.

• Non-Pitting: Molybdenum and Chromium additions provide superior resistance to pitting and crevice corrosion compared to 316/317 stainless steels.

• Intergranular Stability: Stabilized with Titanium to resist intergranular attack after welding or exposure to high temperatures.

2. Engineering & Design Features

• Heavy-Duty Solid Gate: Every Falcon 825 valve features a solid (not clad) Inconel gate, precision-ground to ensure a smooth, low-friction seal against the packing and seats.

• Superior Gland Sealing: Outfitted with high-performance PTFE or Graphite-based packing, reinforced to prevent fugitive emissions in volatile chemical lines.

• Erosion-Resistant Deflector Cones: Optional C276 or Stellite-coated deflector cones can be added to protect the 825 body when handling abrasive acidic slurries.

• Flexible Seat Options: Choose between EPDM/Viton for bubble-tight liquid service or Metal-to-Metal for high-solids/slurry applications.

3. Technical Specifications

Parameter	Specification Details
Material Grade	Inconel 825 (ASTM A494 Grade CU5MCuC / UNS N08825)
Pressure Ratings	ASME B16.34 Class 150, 300, 600
Size Range	2" (DN50) to 48" (DN1200)
Design Standards	MSS SP-81, ASME B16.5, API 598
Temperature Range	-29°C to +540°C (1000°F)

4. Primary Industry Applications

Falcon Inconel 825 valves are the industry standard for:

• Oil & Gas (Sour Service): Handling "Sour" gas containing $H_2S$, $CO_2$, and chlorides (NACE MR0175/ISO 15156 compliant).

• Chemical Processing: Production of sulfuric acid, phosphoric acid, and ammonium sulfate.

• Nuclear Fuel Reprocessing: Handling the complex radioactive and acidic waste streams.

• Pollution Control: Exhaust systems and scrubbers where sulfuric acid condensation is a constant threat.

• Pickling Operations: Specifically in steel processing lines utilizing hot sulfuric acid baths.

Quality & Verification Benchmarks

To guarantee the performance of our Inconel 825 builds, Falcon provides:

1. Titanium Verification: PMI testing to ensure the correct Titanium-to-Carbon ratio for stabilization.

2. Pressure Testing: Each valve undergoes hydrostatic shell testing at $1.5 times$ the rated pressure and pneumatic seat testing per API 598.

3. Dye Penetrant Inspection: All critical welds and sealing surfaces are checked for microscopic surface flaws.

4. Traceability: Full EN 10204 3.1 Material Test Reports for all pressure-containing components.

Technical Comparison: Inconel 825 vs. Alloy 20

While both materials are specifically designed to survive sulfuric acid, they have different "thresholds" of performance. Alloy 20 is often called the "Sulfuric Acid Alloy, " but Inconel 825 offers a wider range of protection in more complex environments.

 Chemical Composition & Strength

Feature	Alloy 20 (CN7M)	Inconel 825 (CU5MCuC)
Nickel Content	32-38%	38-46% (Higher)
Primary Focus	Pure Sulfuric Acid ($H_2SO_4$).	Sulfuric Acid + Chlorides + High Temps.
SCC Resistance	Good.	Superior (Due to higher Nickel).
Pitting Resistance	Moderate.	Better (Higher Molybdenum/Nickel).
Titanium Stabilized	No (usually Niobium).	Yes

Falcon Inconel 600 Knife Gate Valves

Versatile High-Temperature Performance and Corrosion Resistance

Falcon Inconel 600 Knife Gate Valves are the premier choice for applications requiring a combination of heat resistance and corrosion protection. Utilizing Alloy 600 (UNS N06600), these valves provide a robust solution for the chemical, aerospace, and nuclear industries.

1. The Inconel 600 Advantage

• Stress-Corrosion Cracking (SCC) Immunity: The high nickel content (72% minimum) provides exceptional resistance to chloride-ion SCC.

• High-Temperature Oxidation: Resists oxidation and scaling at temperatures where most stainless steels fail.

• Resistance to Alkalies: Excellent resistance to alkaline solutions (caustics) even at high temperatures.

• Cryogenic Toughness: Unlike many steels that become brittle, Inconel 600 maintains excellent mechanical properties in sub-zero environments.

2. Specialized Design & Engineering

• Precision-Guided Gate: The Inconel 600 gate is ground and polished to prevent "galling, " which can be a common issue with high-nickel alloys during cycling.

• Thermal Expansion Compliance: The valve body is engineered with clearances that allow for expansion and contraction during rapid thermal cycling without compromising the seal.

• Corrosion-Resistant Gland: Features a multi-layered packing system, typically utilizing reinforced PTFE or flexible graphite for high-heat service.

• Bi-Directional Option: Falcon offers the 600 series in both uni-directional and bi-directional designs to suit specific piping layouts.

3. Technical Specifications

Parameter	Specification Details
Material Grade	Inconel 600 (ASTM A494 Grade CY40 / UNS N06600)
Composition	Nickel (72%), Chromium (14-17%), Iron (6-10%)
Pressure Class	ASME Class 150, 300, 600
Size Range	2" (DN50) to 48" (DN1200)
Sealing Standards	MSS SP-81 / ANSI Class VI
Testing	API 598 (Shell/Seat/Pneumatic)

4. Primary Industry Applications

• Nuclear Engineering: Used in primary and secondary systems of pressurized water reactors due to resistance to high-purity water corrosion.

• Chemical Processing: Handling magnesium chloride, caustic soda, and fatty acids at high temperatures.

• Aerospace: Airframe and engine components where high-strength and heat resistance are mandatory.

• Heat Treating: Ideal for furnace muffles, baskets, and fixtures where the valve is exposed to the furnace atmosphere.

• Vegetable Oil Processing: Resistant to corrosion by many organic acids.

Quality Control & Material Verification

Falcon ensures the integrity of every Inconel 600 valve through:

1. Positive Material Identification (PMI): Strict verification of the 72% Nickel minimum to ensure SCC immunity.

2. NDT Inspection: Dye Penetrant and Ultrasonic testing on all high-pressure castings to ensure a defect-free structure.

3. High-Temperature Functional Test: Optional testing to verify the valve's torque and sealing performance at the client’s actual operating temperature.

4. Full Traceability: Every valve includes an EN 10204 3.1 Material Test Report.

Comparison Note for Clients: 600 vs. 625

"While Inconel 625 is the better choice for liquid acid corrosion and seawater, Inconel 600 is the superior, more cost-effective choice for high-temperature oxidation and caustic environments."

Technical Comparison: Inconel 600 vs. 316L Stainless Steel for Caustic Service

 

In high-temperature alkaline environments (such as Sodium Hydroxide or Potassium Hydroxide), standard stainless steels suffer from a phenomenon known as Caustic Stress Corrosion Cracking (CSCC). Inconel 600 is specifically designed to eliminate this risk.

Resistance to Caustic Stress Corrosion Cracking (CSCC)

Environment	316L Stainless Steel	Falcon Inconel 600
Low Temp Caustic (< 50°C)	Suitable	Excellent
High Temp Caustic (> 100°C)	High Risk of Cracking	Immune / Highly Resistant
Molten Caustics	Rapid failure	Industry Standard Choice
Nickel Content	10-14%	72% (Minimum)

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 

Falcon Monel 400 Knife Gate Valves

Specialized Corrosion Resistance for Marine and Hydrofluoric Environments

Falcon Monel 400 Knife Gate Valves are high-performance isolation solutions engineered for environments where seawater, brine, and volatile acids are present. Constructed from Alloy 400 (UNS N04400), a solid-solution nickel-copper alloy, these valves provide exceptional toughness and corrosion resistance across a wide temperature range, from sub-zero to $450^circtextC$.

1. The Monel 400 Advantage

Monel 400 is unique because it remains ductile even at cryogenic temperatures and offers superior resistance to:

• Rapidly Flowing Seawater: Unlike many stainless steels that suffer from "pitting" in stagnant salt water, Monel 400 thrives in marine environments.

• Hydrofluoric Acid (HF): It is one of the few alloys that can handle all concentrations of hydrofluoric acid up to the boiling point.

• Reducing Media: Provides excellent resistance to sulfuric and hydrochloric acids under reducing conditions.

• Alkalies: Virtually immune to stress-corrosion cracking in typical caustic environments.

2. Engineering & Design Features

Falcon’s Monel 400 series incorporates specialized design elements to maximize the life of the alloy:

• Solid Monel Gate: To ensure structural integrity, we use solid Monel 400 plates (not just cladding) that are precision-ground to a mirror finish to reduce operating torque.

• Self-Cleaning Seat Design: The valve body is designed to flush out salt crystals, scale, or solids during every cycle, preventing "jamming" in high-solids applications.

• Marine-Grade Hardware: All external fasteners and the yoke assembly are treated or manufactured from compatible alloys to prevent galvanic corrosion in salty atmospheres.

• Flexible Seating: Available with Metal-to-Metal seats for abrasive slurries or PTFE/EPDM for bubble-tight gas and liquid isolation.

3. Technical Specifications

Parameter	Specification Details
Body/Gate Material	Monel 400 (ASTM A494 Grade M35-1 / UNS N04400)
Pressure Class	ASME B16.34 Class 150 & 300
Size Range	2" (DN50) to 48" (DN1200)
Leakage Class	MSS SP-81 / ANSI Class VI (Resilient Seat)
Standards	API 598, ASME B16.5, MSS SP-81
Actuation	Handwheel, Bevel Gear, Pneumatic, or Electric

4. Primary Industry Applications

Falcon Monel 400 valves are the industry standard for:

• Marine & Offshore Engineering: Seawater intake systems, ballast water management, and firewater lines on oil platforms.

• Salt Production & Mining: Handling highly concentrated brine slurries and salt crystallization processes.

• Oil Refining (HF Alkylation): Specialized builds for hydrofluoric acid units where safety and material reliability are non-negotiable.

• Chemical Processing: Handling chlorine, fluorine, and various fatty acids.

• Power Plants: Condenser cooling systems utilizing brackish or salt water.

Quality & Testing Benchmarks

To ensure the highest reliability for your project, every Falcon Monel 400 valve undergoes:

1. PMI Testing: Verification of Nickel (63% min) and Copper content to ensure authentic Alloy 400 chemistry.

2. Hydrostatic Shell Test: Tested at $1.5 times$ design pressure to ensure zero porosity in the casting.

3. Pneumatic Seat Test: Low-pressure air test to confirm seal integrity.

4. Full Traceability: Supplied with EN 10204 3.1 Material Test Reports for all pressure-containing parts.

Technical Comparison: Monel 400 vs. Hastelloy C276/C22

While both are "super-alloys, " they serve very different chemical purposes. Choosing the wrong one can lead to rapid valve failure, so understanding these differences is critical for engineering teams.

Core Chemical Resistance

Feature	Monel 400 (Nickel-Copper)	Hastelloy C276/C22 (Nickel-Chrome-Moly)
Primary Strength	Reducing environments and seawater.	Oxidizing and highly complex chemical mixes.
Hydrofluoric Acid	Best Choice. Immune to all concentrations.	Good, but Monel is the industry standard for HF.

For your website, here is a professional, original technical brief for Falcon Titanium Knife Gate Valves. Titanium is often the ultimate solution for weight-sensitive applications and environments involving high-strength chlorides.

Falcon Titanium Knife Gate Valves

Ultimate Chemical Immunity & High Strength-to-Weight Performance

Falcon Titanium Knife Gate Valves represent the pinnacle of corrosion resistance for extreme industrial service. Utilizing Titanium Grade 2 (UNS R50400) or Grade 5 (UNS R56400), these valves provide an inert barrier against the most aggressive corrosive agents that would degrade even high-nickel alloys like Hastelloy.

1. The Titanium Advantage

Titanium’s legendary resistance is due to the spontaneous formation of a stable, protective oxide film on its surface.

• Chloride Immunity: Virtually immune to pitting and crevice corrosion in seawater, brackish water, and brine, even at elevated temperatures.

• Oxidizing Environments: Exceptional performance in nitric acid, chromic acid, and wet chlorine gas.

• Erosion-Corrosion Resistance: The hard oxide layer makes titanium highly resistant to high-velocity flow and abrasive slurries.

• Weight Efficiency: Titanium is approximately 45% lighter than steel, making these valves ideal for offshore platforms and weight-sensitive piping systems.

2. Engineering & Design Features

• Precision Machined Gate: We use solid titanium plates ground to an ultra-smooth finish. This minimizes friction against the seats and packing, drastically reducing the torque required for automation.

• Inert Seating Technology: Available with specialized reinforced PTFE or Metal-to-Metal seats designed to maintain a seal in high-cycle chemical processing.

• Cavity-Free Body: The internal geometry is designed to prevent "dead zones, " ensuring that aggressive media does not accumulate and create localized chemical reactions.

• Cryogenic Capability: Titanium maintains its mechanical properties in extreme cold, making it suitable for specialized cryogenic chemical applications.

3. Technical Specifications

Parameter	Specification Details
Material Grades	Titanium Grade 2 (CP), Grade 5 (6Al-4V), Grade 7 (with Palladium)
Pressure Class	ASME B16.34 Class 150, 300
Size Range	2" (DN50) to 36" (DN900)
Standard Testing	API 598, MSS SP-151
Face-to-Face	MSS SP-81
Temperature Range	-29°C to +350°C (subject to seat material)

4. Strategic Industry Applications

Falcon Titanium valves are the first choice for:

• Desalination & Water Treatment: High-temperature brine heaters and seawater intake lines where zero corrosion is required.

• Chemical Processing: Handling wet chlorine, chlorates, and hypochlorites in chlor-alkali plants.

• Pulp & Paper: Bleach plant stages using chlorine dioxide or ozone.

• Hydrometallurgy: Gold and nickel leaching processes involving high-pressure oxidizing acids.

• Aerospace & Marine: Applications requiring a combination of high strength, low weight, and salt-air resistance.

Quality & Verification

To ensure the integrity of our titanium builds, Falcon provides:

1. PMI Verification: To confirm the specific grade of titanium and oxygen content.

2. Specialized Welding: Titanium requires an inert gas (Argon) environment for welding; our certified welders ensure every joint is free of contamination.

3. Dye Penetrant Inspection: Conducted on all sealing surfaces to ensure a 100% flaw-free finish.

4. Traceability: Full EN 10204 3.1 certification provided with every valve.

Technical Comparison: Titanium vs. Stainless Steel (316L)

While Stainless Steel 316L is a versatile material, it has significant limitations in high-chloride or highly oxidizing environments where Titanium thrives.

1. Corrosion & Lifecycle Performance

Feature	Stainless Steel 316L	Titanium (Grade 2/5)
Pitting Resistance (PREN)	Moderate (24-26)	Immune to chloride pitting.
Oxide Layer	Chromium Oxide (can be stripped)	Titanium Dioxide (highly stable/self-healing)

Falcon Hastelloy C22 Knife Gate Valves

Superior Versatility for Advanced Chemical Resistance

Falcon Hastelloy C22 Knife Gate Valves are designed for critical process industries that require a higher level of protection than standard stainless or even C276 alloys can provide. Constructed from Alloy C22 (UNS N06022), these valves are the ultimate solution for processes that alternate between oxidizing and reducing environments.

1. Why Choose Hastelloy C22?

Hastelloy C22 contains a higher chromium content than C276, providing enhanced resistance to:

• Pitting & Crevice Corrosion: Highly effective in stagnant or low-flow corrosive media.

• Oxidizing Media: Superior performance in wet chlorine, nitric acid, and mixtures containing ferric or cupric salts.

• Weld Zone Integrity: Resists the formation of grain-boundary precipitates in the weld heat-affected zone, maintaining the valve's strength after fabrication.

2. Specialized Design Features

• Interchangeable Seat Design: Available with high-performance PTFE, reinforced Teflon, or metal-to-metal seats for high-temperature service.

• Reinforced Gland Yoke: Engineered to handle high cycle rates in automated systems, ensuring the gate remains perfectly centered for a bubble-tight seal.

• Integrated Scrapers: Optional secondary scrapers can be installed to clean the gate on every stroke, preventing C22 material buildup in sticky chemical applications.

• Streamlined Flow Path: The interior body is precision-cast to eliminate "pockets" where aggressive chemicals could pool and cause localized corrosion.

3. Technical Specifications & Performance

Feature	Specification
Material Grade	Hastelloy C22 (ASTM A494 Grade CX2MW)
Size Availability	2" to 36" (Standard); Custom larger sizes available
Pressure Ratings	ASME Class 150, 300
End Connections	Lug, Wafer, or Flanged (RF/FF)
Seat Leakage	MSS SP-81 / ANSI Class VI
Applicable Standards	ASME B16.34, API 598, MSS SP-81

4. Key Industrial Applications

Falcon C22 valves are specifically recommended for:

• Pharmaceutical Manufacturing: Ideal for high-purity chemical reactions where cross-contamination and corrosion must be zero.

• Waste Acid Recovery: Handling mixed acid streams that contain high levels of oxidizing contaminants.

• Bleach Plants (Advanced): Used in the most aggressive stages of pulp bleaching where C276 might show signs of pitting.

• Hazardous Waste Incineration: Handling the highly corrosive "scrubber liquor" generated during the treatment of chemical waste.

• Marine & Subsea: Components requiring absolute immunity to seawater corrosion in high-temperature heat exchangers.

Comparison Note: C22 vs. C276

For your customers, it is helpful to note: While C276 is excellent in reducing environments (like Hydrochloric acid), C22 provides better overall protection in a wider "mix" of chemicals, especially those that are highly oxidizing.

Specialized Leakage & Pressure Tests

Falcon valves are tested beyond standard water-pressure benchmarks:

 

• Bubble-Tight Seat Test: Using the API 598 or MSS SP-151 standards, we perform a "Low-Pressure Air Test" on the seat. Even a single bubble is cause for rejection in a C22 "Zero-Leakage" build.

• High-Pressure Shell Test: The valve body is tested at $1.5 times$ its rated pressure (e.g., a 150# valve is tested at 450 PSI) to ensure absolute structural safety.

• Cycle Repeatability Test: For automated C22 valves, we perform functional cycling (Open/Close) under pressure to ensure the Inconel-reinforced packing maintains a seal during high-frequency operation.

Certification & Documentation Package

We provide a comprehensive "Quality Passport" with every shipment:

• EN 10204 3.1 Certificate: Full chemical and mechanical traceability.

• Hydro-Test Reports: Documented results of seat and shell integrity.

• ertificate of Conformance: Stamped guarantee that the valve meets all design standards (ASME B16.34, MSS SP-81).