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High-Temperature Baffle Door
The high-temperature damper valve (also known as high-temperature baffle valve or desulfurization Flue gas damper) is a core shut-off device for flue gas and air duct systems
- ISO 9001:2015
- NDA on request
- 1 pc MOQ
- DDP available
About this part
The high-temperature damper valve (also known as high-temperature baffle valve or desulfurization Flue gas damper) is a core shut-off device for flue gas and air duct systems, specifically designed for high-temperature, high-dust, and corrosive media conditions. Through dual dynamic sealing technology and intelligent interlocking control, it achieves precise opening and closing of the media flow path and zero-leakage sealing, completely solving the energy loss problem caused by high leakage rates in traditional dampers.
Core Technological Advantages
- Louver-type linkage structure
Uses a 90° stroke electric actuator to drive the main shaft, synchronously controlling the rotation of multiple blades via a crank-connecting rod mechanism.
Blades parallel to the media flow direction: fully open state (flow resistance ≤1%)
Blades perpendicular to the media flow direction: fully closed state (industry-leading sealing performance)
Action response time < 10 seconds, supports DCS remote control
- Dual-stage active sealing system (industry-exclusive)
Sealing level | Technical Principles | Improved sealing performance |
Mechanical hard seal | Ultra-thin alloy sealing strips on the blade edges + frame sealing edges | High-temperature deformation compensation, fitting accuracy 0.1mm. |
Airtight barrier | Sealed air valve with intelligent interlock to the actuator. | Seal pressure > 1.5 times the medium pressure. |
Automatically triggered upon closing: High-pressure clean air is injected into the sealed cavity, forming an impenetrable gas barrier, resulting in a leakage rate of ≤1% (far exceeding the national standard limit of 1.5%). |
- Design for Extreme Operating Conditions
Blade Structure: Double-layer panel + internal stiffeners welded hollow body (resistant to deformation at 800℃ high temperature)
Bearing System: UCF self-aligning bearing support, resistant to combined axial and radial loads
Material Matrix: Carbon steel: for conventional high-temperature media (≤550℃)
Nickel-based alloy: for corrosive environments such as desulfurized flue gas (3 times longer lifespan)
Compared to ordinary Power plant dampers (6mm thin steel plate): 400% improvement in creep resistance
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Our Commitment
Factory-tested air leakage rate < 1%
Seal wear after 100,000 opening and closing cycles < 0.05mm
Maintenance-free period > 24 months
Typical Application Scenarios
System location | Medium type | Temperature range | Pressure rating |
Boiler flue gas bypass | Dust-laden flue gas | 300-650℃ | PN0.6-2.5MPa |
Desulfurization tower inlet and outlet | Corrosive wet flue gas | 80-180℃ | PN0.25 |
Waste heat power generation system | High-velocity exhaust gas | 400-750℃ | PN1.0 |
Why Choose Us?
- 1 Precision Manufacturing Process
Frame laser cutting + robotic welding (flatness ±0.5mm/m²)
Sealing edge plate surface plasma hardening (hardness HRC55-60)
100% airtightness helium mass spectrometry testing
- 2 Intelligent Operation and Maintenance Guarantee
Built-in opening sensor + sealing gas pressure monitoring
Supports IoT platform for real-time diagnosis (warning of sealing failure risk)
- 3 Strictly Sealing Every Leak
[Lianyungang Huaneng Auxiliary Equipment] High-Temperature Damper Valve – Providing zero-leakage system solutions for the power, metallurgy, and chemical industries with aerospace-grade sealing technology!
Quick Access to Technical Parameters
Maximum Diameter: 8m × 8m
Applicable Temperature: -40℃~800℃
Driving Method: Electric/Pneumatic/Hydraulic
Quality documentation included
- Dimensional inspection report (CMM / profile projector) for critical features
- Material certificate with heat number traceability
- Surface finish and hardness records where specified
- Photographic packing record before shipment
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FAQ
Common questions
What products does Lianyungang Huaneng Power Auxiliary Equipment manufacture?
We manufacture power plant dampers (flue gas, desulfurization, high-temperature baffle doors), slide gate valves, blind flange valves, rotary film and sponge iron deaerators, venting silencers, automatic dosing devices, steam-water sampling devices and sampling coolers, coal powder samplers, condensate recovery units, coarse and fine powder separators, and plate / shell-and-tube heat exchangers.
Which certifications does your factory hold?
We are certified to ISO 9001:2015 (quality), ISO 14001:2015 (environmental) and ISO 45001:2018 (occupational health and safety) management systems. We are also a qualified supplier of Sinopec, PetroChina, China Guodian Corporation, China Datang Corporation, CNOOC and Aluminum Corporation of China Limited.
Can you match a damper or valve to our existing ductwork?
Yes — most of our business is retrofit supply. Send us the duct cross-section, design temperature and media, or drawings, templates and photos of the existing installation. Our engineers will dimension the unit, its flange drilling and the actuator interface to bolt directly into your plant.
What leakage performance do your dampers achieve?
Louver-type double-layer dampers with sealing air achieve a leakage rate below 0.5%; fully sealed slide gates and coal mill isolation doors achieve zero internal and external leakage. Every damper is leakage-tested in the works before shipment and a factory acceptance test report is supplied.