DP -70°C
Rotary Desiccant Dehumidifier
DHU series heavy-duty honeycomb desiccant units engineered for solid-state battery synthesis, semiconductor cleanrooms, and ammunition preservation.
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Product Matrix Alpha
Primary Desiccant & Environmental Systems
Ultra-low dew point air conditioning, closed-loop industrial dehumidification, and chemical recovery lines engineered to ASME, CE, UL, and CSA standards.
DP -70°C
Turnkey EPC
Turn-key Dry Room System
Complete clean-dry modular enclosures, airtight walls, custom air distribution ducts, and PLC SCADA management designed for gigafactories.
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Recovery ≥99%
NMP Recovery System
Captures and purifies toxic N-Methyl-2-pyrrolidone vapors discharged from cathode coating ovens with minimal thermal footprint.
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Cryo + RTO
VOC Abatement System
Dual-stage condensation coupled with regenerative thermal oxidizers (RTO) destroying volatile emissions under stringent EPA criteria.
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High Volume
Refrigerative Dehumidifier
High-efficiency mechanical condensation chillers for primary humidity shaving in storage staging and warehouse humidity buffering.
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Clean ISO 6
Cell Assembly Clean Booths
Ultra-low leakage airtight cleanrooms tailored for cathode-anode stacking, winding, and precision pouch welding environments.
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Continuous
Solvent Stripping Unit
Specialized gas scrubbing columns engineered to operate alongside coating dryers to protect personnel from volatile chemical exposure.
Solvent Engineering
Zero Odor
Regenerative Thermal Oxidizer
High-temperature catalytic ceramic beds delivering thermal heat recovery rates exceeding 95% while destroying toxic industrial aromatics.
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CATLTeslaBYDNorthvoltATLEVE EnergyFarasis EnergyEnvision AESCSVOLTTTI Global
CATLTeslaBYDNorthvoltATLEVE EnergyFarasis EnergyEnvision AESCSVOLTTTI Global
Global Strategic Whitepaper
Macro Industrial Dynamics: Why China Leads the Worldwide Desiccant Landscape
The international manufacturing sector is undergoing an unprecedented shift toward electrification, sub-nanometer lithography, and high-potency API synthesis. In these precision sectors, atmospheric moisture is no longer a benign climate variable—it is a critical yield killer.
Gigawatt-Scale Demands
Global lithium cell output demands dry room environments holding continuous dew points between -40°C and -70°C. Moisture concentrations exceeding 5 ppm induce hydrofluoric acid (HF) generation during LiPF6 electrolyte filling, triggering battery swelling and thermal runaway risks. China's integrated supply chain delivers the required scale at high efficiency.
Honeycomb Matrix Science
Historically dominated by Western legacy providers, desiccant rotor manufacturing has advanced via Chinese R&D into corrugated inorganic ceramic honeycomb matrices. Synthesizing high-density molecular sieves with activated silica gel delivers stable moisture adsorption without desiccant dusting or chemical carryover.
Thermal Energy Optimization
Rotor desorption consumes massive amounts of thermal energy. Modern Chinese honeycomb systems integrate heat pipe exchangers, turbine waste steam recapture, and multi-stage regeneration loops, cutting baseline operating costs (OPEX) by 30% to 45% compared to conventional air handlers.
Factory Audit Data
Hangzhou DryAir: 15+ Years of Ultralow Humidity Control
Founded in 2010 in Hangzhou's Qingshan Industrial Park, Hangzhou DryAir Treatment Co., Ltd. has grown to become an international supplier of rotary desiccant systems, occupying a 30%+ market share across China's battery dry room market.
Our systems run continuously across cleanroom campuses for Tesla, Northvolt, CATL, and BYD. Rather than simply supplying a catalog unit, we operate as an end-to-end Engineering, Procurement, and Construction (EPC) turnkey provider. From computational fluid dynamics (CFD) airflow modeling to on-site assembly and Dew Point validation, DryAir eliminates air infiltration and human vapor transmission risks.
Export Passports
CE • UL • CSA • ASME • EAC
-70°C
Controllable Dew Point
≥99%
NMP Solvent Recovery
30%+
Domestic Market Share
200+
Units Fabricated Monthly
74
R&D Engineers & PhDs
Application Engineering
Tailored Industrial Deployments & Use-Cases
Moisture risks differ fundamentally across manufacturing domains. Sizing systems according to precise psychrometric thresholds safeguards plant yield and regulatory compliance.
Lithium & Sodium Battery Lines
Targeting -40°C to -65°C dew point levels across winding, stacking, electrolyte injection, and seal welding. Prevents lithium degradation and internal cell shorting while integrating closed-loop solvent containment.
View Battery Solutions →Pharmaceutical & Biosynthesis
FDA GMP Class A/B compliant dehumidification maintaining ≤15% RH during hygroscopic powder milling, fluidized bed spray drying, and gelatin softgel capsule hardening to prevent agglomeration.
View Pharma Solutions →Defense, Aerospace & Avionics
Engineered under China's GJB military specifications, our systems prevent micro-corrosion on radar waveguides, guided munitions storage, and high-altitude avionics payload assembly bays.
View Defense Systems →Petrochemical & VOC Abatement
Deep-cooling condensation units working in concert with Regenerative Thermal Oxidizers (RTO) reclaim petroleum vapors and toxic emissions at storage loading terminals.
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Buyer's Engineering Specification Guide
Critical Dew Point Operating Thresholds
Selecting inaccurate dew point parameters can inflate initial plant CapEx or lead to irreversible batch failures. The matrix below defines validated target parameters utilized by global cleanroom design engineers:
| Industrial Application / Process Zone | Required Dew Point / Relative Humidity | Recommended Machine Architecture | Action Reference |
|---|---|---|---|
| Lithium-ion Cell Assembly & Electrolyte Injection | -40°C to -60°C DP | Turnkey Low Dew Point Dry Room System | Explore Turnkey |
| Next-Gen Solid-State & Lithium-Metal Synthesis | -60°C down to -70°C DP | Dual-Rotor Cascade Honeycomb Dehumidifier | Explore Desiccant |
| Cathode Electrode Coater Exhaust Processing | ≥99% NMP Recovery Rate | ZJRH Cold-Trap Condensation & Scrubber | Explore Recovery |
| Hygroscopic Pharma Formulation & Effervescent Packaging | 10% to 25% RH (< 20°C DB) | Standard Rotary Desiccant Dehumidifier (DHU) | Explore Pharma |
| Ordnance, Missile Systems & Avionics Storage | ≤35% RH (Non-condensing) | Military Specification Environmental AHU | Explore Defense |
| Bulk Chemical Warehousing & Marine Logistics | 45% to 60% RH | Commercial Refrigerative DX Dehumidifier | Explore Chiller |
| Hydrocarbon Fuel Storage & Industrial Stack Treatment | EPA / EU Solvent Thresholds | Deep-Cooling Condensation + RTO Complex | Explore VOC |
Global Regulatory Compliance
Localized International Support & Compliance Assurance
Bridging cross-border engineering with regional certifications, safety compliances, and factory-trained overseas service personnel.
Comprehensive Certifications
Units dispatched to the European Union comply strictly with CE Machinery & Low Voltage directives; North American exports feature UL 508A electrical panels, CSA approvals, and ASME-stamped pressure vessels. Eurasian deployments carry regional EAC certification.
On-Site Commissioning & SLA
Our international service teams deliver on-site supervision, commissioning, and system training worldwide. DryAir offers extended 2-year overseas warranty packages backed by rapid regional dispatch of precision components, seals, and PLC boards.
GJB Quality Management
Hangzhou DryAir implements both ISO 9001 and the GJB National Military Standard quality systems. Every air handling unit undergoes rigorous testing in our in-house performance chamber before leaving the factory floor.
R&D Pipeline
Desiccant Rotor Technology Roadmap: 2025–2030
To support the next phase of battery gigafactories and carbon-neutral manufacturing, Hangzhou DryAir is driving key engineering milestones:
2025
Sub-80°C Regeneration
Deploying novel metal-organic framework (MOF) desiccant rotors capable of full moisture desorption using low-grade industrial waste heat under 80°C, reducing electrical heater dependency.
2026
Predictive AI Control
Integrating industrial IoT psychrometric telemetry that predicts external weather shifts and shifts rotor speed, chilled water valves, and heating loads dynamically for stable operation.
2028
Solid-State Specialization
Refining dual-wheel closed-circuit argon-purged desiccant loops sustaining continuous -80°C dew points tailored for sulfide-based solid electrolyte assembly cleanrooms.
2030
Zero-Carbon Dry Rooms
Full integration of solar thermal arrays and geothermal direct loops into turnkey battery facilities, establishing verifiable carbon-neutral dry room environments.
Product Matrix Beta
Complete Cleanroom & Solvent Handling Systems
Select from our standard industrial catalog or configure an engineered-to-order drying and emissions footprint.
Zero Loss
Cathode Exhaust Recovery
High-efficiency solvent condensation recovery loop for roll-to-roll electrode coating lines, delivering continuous solvent reuse.
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GMP Validated
Pharma Dehumidifiers
Hygienic stainless steel internal air treatment units preventing biological growth and cross-contamination across active drug packaging.
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Mil-Standard
Defense Dehumidifier
GJB standard environmental equipment designed for long-term weapon storage, propellent stability, and naval hangar protection.
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Explosion-Proof
Fuel Gas Recovery Unit
Refrigerated condensation assemblies engineered for volatile hydrocarbon recovery at fuel storage yards and marine offloading docks.
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Optics Grade
Precision Electronics AHU
Stable RH control systems protecting wafer manufacturing, advanced laser packaging, and optical coatings from atmospheric degradation.
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Custom EPC
Modular Dry Room Enclosures
Insulated rock-wool and aluminum-honeycomb modular wall panels engineered for tight air retention and rapid industrial installation.
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Ultra Low DP
Dual-Wheel Cascade AHU
Two-stage desiccant rotor system that achieves -70°C dew points reliably even during humid subtropical summer conditions.
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Emission Low
Thermal Emission Catalyzers
Secondary catalytic abatement modules that eliminate trace volatile organics from factory exhausts, meeting strict local environmental codes.
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Procurement & Technical Clarifications
Frequently Asked Engineering Questions
Everything plant directors, procurement managers, and consulting HVAC engineers need to verify before tender finalization.
What is the lowest controllable dew point achievable by DryAir's honeycomb desiccant systems?
Hangzhou DryAir rotary desiccant systems reliably deliver supply air dew point performance down to -70°C (moisture content below 0.003 g/kg dry air). This satisfies the strict production demands of high-nickel lithium-ion cells, sodium-ion batteries, and solid-state battery electrolytes.
Does Hangzhou DryAir engineer and deliver complete turnkey dry rooms overseas?
Yes. We provide complete turnkey dry room delivery models encompassing initial load consultation, psychrometric schematic design, factory fabrication, worldwide shipping, structural assembly, PLC controls integration, on-site commissioning, and dew point certification. We have delivered projects for global leaders including Tesla, Northvolt, and TTI.
Which regulatory and electrical compliance certifications are provided for export?
DryAir systems can be configured with CE marks (Machinery and Low Voltage Directives), UL 508A electrical validation, CSA certifications for Canada, ASME stamps for pressure vessels, and EAC certifications for the Eurasian Economic Union. Our plant operations follow ISO 9001 and the GJB Chinese national military quality standard.
What recovery rate and purity does the DryAir NMP recovery system guarantee?
Our multi-stage cold-trap condensation and solvent recovery systems deliver verified N-Methyl-2-pyrrolidone (NMP) recovery efficiencies of ≥99% on cathode coating and drying exhaust lines. Recovered solvent can be re-distilled on-site, lowering chemical procurement overhead while staying well within regional VOC emission ceilings.
What international after-sales support and warranty agreements are offered?
Beyond standard equipment warranties, overseas clients can choose an optional two-year comprehensive service agreement. This program includes round-the-clock remote diagnostics, priority air-freight spare parts distribution, and regular on-site maintenance visits by DryAir commissioning engineers.
Direct Engineering Consultation
Require an Engineered Dew Point Solution for Your Facility?
Share your workshop dimensions, desired room dew point, internal personnel load, and local ambient climate data. Our senior HVAC engineering team will deliver a comprehensive psychrometric calculation and system proposal within 24 hours.
Direct Line: +86 571 8990 5557
Engineering Inquiries: [email protected]
HQ: No. 2088 Keji Road, Qingshan Industrial Park, Lin'an, Hangzhou, China