High-Temperature & Refractory-Lined Valves – BFG Systems

Engineered for Extreme Temperature, Abrasive Gas, and High-Pressure Conditions up to 1200°C

High-Temperature & Refractory-Lined Valves

Introduction

Blast Furnace operations involve handling extremely high-temperature gases (up to 1200°C), abrasive dust, and high-pressure flows. Refractory-lined and high-temperature BFG valves are critical to maintaining process safety, operational efficiency, and long-term durability under such extreme conditions.

These valves are used in hot blast, stove combustion, taphole, and dome systems, offering abrasion-resistant, heat-resistant, and corrosion-resistant flow control.

Mission-Critical Extreme Environment Valves

Designed to withstand the harshest conditions in steel production, these valves combine advanced materials, refractory technology, and precision engineering to deliver reliable performance where conventional valves would fail.

Key advantages include:

  • Extreme temperature resistance up to 1200°C
  • Refractory-lined construction for thermal protection
  • Abrasion and erosion resistance for dust-laden gases
  • High-pressure capability with thermal expansion allowance
  • Water-cooled or air-cooled designs available
  • Long operational life with minimal maintenance
  • ASME, ISO, EN compliance and certifications

Engineered for reliability in the most demanding applications, our high-temperature valves ensure safe and efficient operation in blast furnace environments.

Key Valve Types & Technical Features

RLBV

Refractory Lined Butterfly Valve

Regulates high-temperature BFG flow in ducts, burners, and stoves. Provides tight shut-off and modulating control in harsh thermal conditions.

Design Features:
  • High-temperature refractory lining (ceramic or high-alumina based) for internal protection
  • Cast iron, carbon steel, or alloy steel body with thermal expansion allowance
  • Pneumatic or electric actuation for precision control
  • Abrasion- and erosion-resistant sealing surfaces
  • High turn-down ratio for modulating flow in hot blast and stove applications
Applications:

BFG ducting and hot blast stoves • Flue gas bypass and combustion air control • High-temperature gas modulation

RLGV

Refractory Lined Gate Valve

Provides full isolation of BFG flow in high-temperature ducts and lines. Protects upstream and downstream equipment from abrupt flow surges.

Design Features:
  • High-temperature refractory lining up to 1100°C
  • Metal-to-metal sealing or refractory-coated gate for tight closure
  • Water-cooled bonnet or expansion joints to mitigate thermal stresses
  • Manual, hydraulic, or pneumatic actuation options
Applications:

Blast furnace main gas lines • Stove inlet/outlet isolation • Hot blast duct shut-off • Emergency isolation systems

HBSGV

Hot Blast Slide Gate Valve

Smoothly regulates the flow of hot blast air and gases to furnace tuyeres. Provides quick isolation while maintaining high-temperature tolerance.

Design Features:
  • Refractory-lined sliding gate for abrasion resistance
  • Alloy steel or cast steel construction for structural integrity
  • Cooling jackets for high-temperature operation (>1000°C)
  • Interlocked with control systems for automated operation
Applications:

Hot blast main lines to furnace • Stove interconnections • Emergency flow isolation • Tuyere gas control

HBBFV

Hot Blast Blast Furnace Valve

Controls primary hot blast airflow into the furnace. Ensures consistent air distribution at temperatures up to 1100°C.

Design Features:
  • Cast iron, carbon steel, or high-alloy steel body
  • Heat-resistant lining or refractory inserts
  • Actuated via hydraulic, pneumatic, or electric systems
  • High structural strength to withstand blast pressure and thermal shock
Applications:

Hot blast main dome valves • Stove to furnace air regulation • Industrial steelmaking hot blast systems • Primary air control

SDV

Stove Dome Valve (High Temp, 1100–1200°C)

Manages exhaust flue gas from stoves to hot blast main or bypass lines. Withstands extreme temperatures and cyclic thermal expansion.

Design Features:
  • Fully refractory-lined valve body and closure element
  • Water-cooled or air-cooled bonnet designs
  • Alloy steel or heat-resistant cast steel body
  • High-temperature actuators with fail-safe interlocks
Specialized Engineering:
  • Designed for long operational life in cyclic heating environments
  • Thermal expansion compensation systems
  • High-temperature seal technology
  • Structural reinforcement for pressure and temperature loads
Applications:

Hot blast stove dome control • Gas routing between stove, ducting, and furnace • High-temperature emission control systems • Cyclic heating systems

Engineering Highlights

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Temperature Range

Up to 1200°C continuous operation. Designed for extreme thermal environments with specialized cooling and insulation.

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Pressure Handling

0.5 – 5 bar (higher-pressure designs on request). Engineered for stable operation under fluctuating pressure conditions.

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Materials

  • Body: Cast Iron, Carbon Steel, Alloy Steel
  • Lining: High-alumina refractory, ceramic tiles, insulating coatings
  • Special: Heat-resistant alloys, refractory coatings
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Actuation

Manual, Pneumatic, Hydraulic, Electric. Customized for high-temperature environments with thermal protection.

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Sealing

Refractory-coated gates, metal-to-metal, or ceramic seals. High-temperature sealing technology for leak-proof operation.

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Standards & Codes

  • • ASME B16.34 (Pressure Valves)
  • • ISO 10497 (High-temperature valve testing)
  • • EN 334 / EN 335 (Gate & Butterfly valves)
  • • Industry-specific high-temperature standards

Applications in Steel & Blast Furnace Operations

Hot Blast Stove Systems
  • • Gas control and distribution
  • • Temperature regulation
  • • Combustion optimization
BFG Handling Systems
  • • Ducting and flow control
  • • High-temperature gas routing
  • • Pressure regulation
Emission Control
  • • Flue gas bypass systems
  • • Emission management
  • • Environmental compliance
Temperature Management
  • • Stove dome regulation for uniform temperature
  • • Thermal cycling control
  • • Heat recovery optimization
Safety & Maintenance
  • • Maintenance isolation systems
  • • Emergency shut-off
  • • Safety interlock systems

Quality Assurance & Testing

  • Hydrostatic and pneumatic pressure testing
  • High-temperature thermal cycling tests
  • Non-Destructive Testing: RT, UT, PT, MT
  • Factory Acceptance Test (FAT) simulating full stove operation
  • Third-party inspections: TÜV, DNV, Lloyd's, BV
  • Refractory lining integrity testing
  • Thermal expansion and stress analysis
  • Seal performance testing at elevated temperatures

Why Our High-Temperature Valves Stand Out

  • Extreme Temperature Capability: Engineered for continuous operation up to 1200°C with refractory protection
  • Advanced Refractory Technology: High-alumina and ceramic linings for thermal insulation and abrasion resistance
  • Thermal Stress Management: Designed for cyclic heating environments with expansion compensation
  • Cooling System Integration: Water-cooled or air-cooled designs for extreme temperature applications
  • Long Operational Life: Engineered for durability with minimal maintenance requirements
  • Safety Compliance: Meets international standards for high-temperature equipment
  • Custom Engineering: Tailored solutions for specific furnace and stove configurations
  • Technical Support: Expert commissioning, maintenance, and refractory repair services

Summary:

BFG High-Temperature & Refractory-Lined Valves are engineered for extreme temperature, abrasive gas, and high-pressure conditions, ensuring long-term reliability, safety, and precise flow control in steel plant operations. They are essential for stove combustion, hot blast distribution, and emission management.

Additional Features & Capabilities

Refractory Technology
  • High-alumina refractory linings (70-90% alumina content)
  • Ceramic tile installation for extreme abrasion resistance
  • Insulating coatings for thermal efficiency
  • Refractory repair and maintenance services
Cooling & Protection Systems
  • Water-cooled bonnets and jackets
  • Air-cooled designs for water-scarce environments
  • Thermal expansion joints and compensation systems
  • Heat shield integration for critical components
Operational Benefits:
  • Reduced energy consumption through improved thermal efficiency
  • Extended equipment life through thermal protection
  • Minimized maintenance downtime
  • Improved process safety and reliability
Stove Combustion System Valves Hydraulic & Pneumatic BF Valves
Ready to Discuss Your High-Temperature & Refractory-Lined Valves Requirements?

Contact our engineering team for custom solutions and quotations.

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