Product Overview

The Pneumatic High Temperature Ball Valve is engineered for severe service applications where conventional soft-seated valves fail due to thermal degradation, seat deformation, or fugitive emissions.
Designed for continuous operation in environments up to 500°C (932°F), this valve combines:

Metal-to-metal sealing technology
High-performance pneumatic actuation
Thermal isolation bonnet design
Live-loaded graphite packing system

Key Technical Specifications

Parameter	Specification
Valve Type	Floating / Trunnion Mounted Ball Valve
Size Range	DN15 – DN600 (1/2" – 24")
Pressure Rating	ASME Class 150 – Class 600 / PN16 – PN100
Temperature Range	-29°C to 500°C
Body Material	ASTM A216 WCB / WCC / CF8 / CF8M / WC6 / WC9
Ball & Seat	Stellite® / Tungsten Carbide HVOF Coated
Leakage Class	API 598 / ISO 5208 Class V – VI
Actuator Type	Pneumatic Rack & Pinion / Scotch Yoke
Mounting Standard	ISO 5211
Fire Safe Design	API 607 / API 6FA
Anti-Static	Standard
Stem Type	Blow-out proof

Engineering Design Advantages

Metal-to-Metal Sealing System

Soft seats (PTFE, RTFE, rubber) degrade rapidly above 200°C.
This valve uses a precision-lapped metal seat design with HVOF tungsten carbide or Stellite coating.
Performance Benefits:
Maintains sealing integrity at 500°C
Resistant to erosion, abrasion, and thermal shock
Achieves API 598 / ISO 5208 Class VI tight shut-off
Long service life in abrasive media (ash, coke, steam)

Thermal-Isolated Pneumatic Actuation

A key failure point in high-temperature valves is actuator heat damage.
This design uses:
Extended bonnet stem (thermal barrier zone)
Heat dissipation chamber
Optional air purge cooling
Result:
Reduces actuator ambient temperature by up to 60%
Protects seals, solenoids, and positioners
Extends actuator life beyond 1,000,000 cycles

Live-Loaded Stem Packing System

Thermal cycling causes stem leakage in standard valves.
Our design uses:

Belleville spring washers
Flexible graphite packing rings

Benefits:

Automatic compensation for thermal expansion
Zero maintenance stem sealing
Reduced fugitive emissions risk (compliance-ready)

Performance Comparison

Feature	Soft Seated Valve	Metal Seated High Temp Valve
Max Temperature	≤ 200°C	Up to 500°C
Seat Life	Medium	Very Long
Maintenance Cycle	Frequent	Extended
Media Resistance	Limited	Abrasive + high temp
Fire Safe	Optional	Standard
Fugitive Emissions Control	Moderate	High

Industry Applications

This valve is engineered for continuous operation in extreme industrial environments:

01/

Power Generation
Superheated steam isolation
Boiler blowdown systems
Fly ash handling systems

02/

Petrochemical & Refining
FCCU units
Hydrocracking systems
High-temperature distillation columns

03/

Metallurgy & Mining
Furnace gas control
Slurry transport systems
Smelting operations

04/

Chemical Processing
Thermal oil loops
Reactor discharge lines
Exothermic process control

Case Study

Refinery FCCU Unit

Operating Temperature: 460°C
Pressure: Class 300
Media: Catalyst-laden hydrocarbon vapor

Challenge:
Existing soft-seated valves failed within 3–6 months due to seat erosion and leakage.
Solution:
Installed metal-seated pneumatic high-temperature ball valves.
Results:

Continuous operation: 24+ months without seat replacement
Leakage reduced to zero measurable bubbles
Maintenance shutdown frequency reduced by 70%

Manufacturing & Quality Assurance

To ensure industrial-grade reliability, every valve undergoes:
API 598 Hydrostatic & Pneumatic Testing
ISO 5208 Leakage Testing
Fire Safe Testing (API 607 / API 6FA)
Material Traceability (EN 10204 3.1 Certificates)

Manufacturing Capabilities
CNC precision machining
HVOF coating system (tungsten carbide / Stellite)
High-temperature assembly line
Pressure testing laboratory

Certifications & Compliance

ISO 9001 Quality Management System
CE / PED Compliance (Europe)
API 6D / API 607 Fire Safe Certification
ATEX (Explosion-proof optional configuration)
SIL-rated actuator integration available

Optional Configurations

We support full customization for project-specific requirements:
Smart Positioner (HART / 4–20mA / Profibus)
Solenoid Valve (Explosion-proof optional)
Air Filter Regulator
Limit Switch Box
Emergency Shutdown (ESD) System Integration
Manual Override Gearbox

Typical Failure Problems Solved

Seat deformation under high heat
Stem leakage from thermal cycling
Actuator failure due to heat exposure
Fugitive emissions compliance violations
Frequent shutdown due to valve erosion

Why Global EPC Contractors Choose This Valve

Proven performance in severe service environments
Extended maintenance intervals reduce lifecycle cost
Designed for API / ISO / ASME compliance projects
Compatible with international automation systems
Suitable for long-term continuous industrial operation