Industry-Verified Manufacturing Data (2026)

Re-heater

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Re-heater used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Re-heater is characterized by the integration of Heating Elements and Heat Exchanger Coils. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A component in dehumidification systems that reheats air after dehumidification to achieve desired temperature and humidity levels.

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Product Specifications

Technical details and manufacturing context for Re-heater

Definition
The re-heater is a critical component within dehumidification systems, specifically positioned after the dehumidification process. Its primary function is to increase the temperature of the dehumidified air, which has been cooled during moisture removal, to restore it to the desired comfort or process temperature while maintaining the reduced humidity level achieved by the system.
Working Principle
The re-heater operates by transferring thermal energy to the dehumidified air stream. Typically, it uses either electrical resistance heating elements or a heat exchanger that circulates hot water, steam, or refrigerant from a separate heating source. As the cooled, dry air passes through the re-heater, it absorbs heat, raising its temperature without adding moisture back into the air.
Common Materials
Stainless steel, Copper, Aluminum
Technical Parameters
  • Heating capacity required to raise air temperature from dehumidifier outlet to desired setpoint (kW) Standard Spec
Components / BOM
  • Heating Elements
    Generate heat through electrical resistance or heat exchange
    Material: Stainless steel or nickel-chromium alloy
  • Heat Exchanger Coils
    Transfer heat from hot water/steam to air stream
    Material: Copper or aluminum with fins
  • Housing/Casing
    Enclose and protect heating components, direct air flow
    Material: Galvanized steel or aluminum
Engineering Reasoning
15-35°C inlet air temperature, 40-80% relative humidity input, 0.5-2.0 m/s air velocity
Coil surface temperature exceeding 150°C causes polymer seal degradation, air pressure drop exceeding 250 Pa indicates fouling failure
Design Rationale: Thermal expansion mismatch between copper heating coils (17×10⁻⁶/°C CTE) and aluminum fins (23×10⁻⁶/°C CTE) causes mechanical stress at >100°C differential
Risk Mitigation (FMEA)
Trigger Calcium carbonate scaling from hard water exceeding 300 ppm
Mode: Reduced heat transfer efficiency with >15% increase in energy consumption
Strategy: Install water softener with ion exchange resin maintaining <50 ppm hardness
Trigger Corrosive condensate pH <5.0 from acidic air contaminants
Mode: Copper coil pitting corrosion at >0.1 mm/year penetration rate
Strategy: Apply epoxy coating with 200 μm thickness and cathodic protection at -0.85 V vs Cu/CuSO4

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Re-heater.

industrial dehumidification re-heater stainless steel air reheater copper heat exchanger re-heater post-dehumidification air reheating machinery equipment re-heater component

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Dehumidification System
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 2 bar (29 psi) maximum working pressure
flow rate: 100-10,000 CFM (2.8-283 m³/min) typical range
temperature: 40-120°C (104-248°F) typical operating range
slurry concentration: Not applicable - designed for clean air/gas streams only
Media Compatibility
✓ Clean air streams ✓ Process gases (non-corrosive) ✓ HVAC system air
Unsuitable: Corrosive chemical environments or particulate-laden streams
Sizing Data Required
  • Required air flow rate (CFM or m³/h)
  • Inlet air temperature after dehumidification (°C or °F)
  • Desired outlet temperature rise (°C or °F)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Tube wall thinning due to high-temperature oxidation
Cause: Excessive operating temperatures beyond material design limits, leading to accelerated oxidation and loss of tube wall thickness, often exacerbated by poor steam quality or oxygen ingress.
Thermal fatigue cracking at tube-to-header welds
Cause: Cyclic thermal stresses from frequent startups/shutdowns or rapid load changes, combined with differential expansion between dissimilar materials or inadequate weld design, causing crack initiation and propagation.
Maintenance Indicators
  • Abnormal increase in pressure drop across the reheater section, indicating flow restriction from internal deposits or tube blockages
  • Audible steam leakage or hissing sounds from the reheater casing, suggesting tube failures or gasket breaches
Engineering Tips
  • Implement strict steam quality control and chemical treatment to minimize scale formation and oxygen corrosion, coupled with regular infrared thermography surveys to detect hot spots indicating tube degradation
  • Optimize startup/shutdown procedures to minimize thermal cycling stresses, and conduct periodic non-destructive testing (e.g., ultrasonic thickness measurements, eddy current testing) on high-stress areas like welds and bends

Compliance & Manufacturing Standards

Reference Standards
ISO 13705:2012 (Petroleum, petrochemical and natural gas industries - Fired heaters for general refinery service) ASME BPVC Section I (Rules for Construction of Power Boilers) EN 12952 (Water-tube boilers and auxiliary installations)
Manufacturing Precision
  • Tube wall thickness: +/-10% of nominal thickness
  • Tube straightness: 1.5 mm per meter length
Quality Inspection
  • Hydrostatic pressure test (1.5 times design pressure)
  • Radiographic testing of welded joints (per ASME Section V)

Factories Producing Re-heater

Verified manufacturers with capability to produce this product in China

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✓ 98% Supplier Capability Match Found

P Project Engineer from Singapore Jan 05, 2026
★★★★★
"Great transparency on the Re-heater components. Essential for our Machinery and Equipment Manufacturing supply chain."
Technical Specifications Verified
S Sourcing Manager from Germany Jan 02, 2026
★★★★★
"The Re-heater we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."
Technical Specifications Verified
P Procurement Specialist from Brazil Dec 30, 2025
★★★★★
"Found 35+ suppliers for Re-heater on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

5 sourcing managers are analyzing this specification now. Last inquiry for Re-heater from Brazil (1h ago).

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Frequently Asked Questions

What is the primary function of a re-heater in dehumidification systems?

A re-heater's primary function is to reheat air after it has been dehumidified, restoring it to the desired temperature and humidity level for optimal environmental control in industrial settings.

What materials are commonly used in industrial re-heater construction?

Industrial re-heaters are typically constructed from durable materials like stainless steel for corrosion resistance, copper for efficient heat transfer, and aluminum for lightweight structural components.

What are the key components in a re-heater's bill of materials (BOM)?

The essential BOM components include heating elements for temperature control, heat exchanger coils for efficient thermal transfer, and a robust housing/casing to protect internal components and ensure safe operation.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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