DP -70°C
DHU Rotary Desiccant Dehumidifier
Delivers stable, low dew point control down to -70°C. Engineered with advanced heat recovery for continuous industrial moisture extraction.
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Product Catalog 01
High-Performance Engineering Systems
Explore our core rotary desiccant units, solvent recovery modules, and complete environmental control enclosures deployed globally across gigafactories and aerospace hangars.
DP -70°C
EPC Turnkey
Turn-key Dry Room System
End-to-end engineered enclosure systems including modular walls, HVAC integration, desiccant air treatment, and airtight interlocks.
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≥99% Yield
ZJRH NMP Solvent Recovery
Engineered for electrode coating and drying lines to capture volatile N-Methyl-2-pyrrolidone vapors, reducing operating costs and emissions.
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RTO Integration
JEN Industrial VOC Abatement
Deep-cooling condensation coupled with Regenerative Thermal Oxidation (RTO) for comprehensive industrial VOC emission compliance.
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Custom HVAC
Custom Modular Air Handlers
High static pressure custom desiccant units built specifically for integration into complex central pharmaceutical and defense HVAC ductwork.
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Lithium Cell
Gigafactory Battery Enclosures
Large-scale turnkey architectural and environmental rooms for high-capacity winding, cell assembly, and automated electrolyte filling.
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Recycling
Dual-Bed NMP Recycling System
Continuous-cycle solvent distillation and condensation units tailored for cathode slurries with automated fluid-loop monitoring.
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Safety First
Vapor Condensation & Recovery Unit
Explosion-proof hydrocarbon and volatile chemical vapor extraction designed for fuel loading, petrochemical hubs, and bulk storage.
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Strategic White Paper
Global Industrial Status & Macro Moisture Dynamics
A technical assessment of why desiccant dehumidification has transitioned from utility HVAC to a core mission-critical manufacturing yield driver worldwide.
The Energy Transition Boom
The global shift toward electric mobility and energy storage systems (ESS) has triggered massive capital expenditure in lithium-ion and solid-state gigafactories. Because modern chemistries react catastrophically with airborne moisture—forming hazardous hydrofluoric acid (HF)—ultra-low dew point engineering (-40°C to -70°C) is now a baseline prerequisite for commercial viable cell manufacturing yields.
Stringent ESG & Emission Mandates
Industrial processors face unprecedented carbon accounting pressure. Traditional high-energy thermal regeneration methods are being phased out in favor of hybrid heat pump coupling, waste heat integration, and closed-loop volatile organic recovery systems that minimize plant-level Scope 1 and Scope 2 footprints under global net-zero governance.
Biopharma & Defense Standards
Accelerating compliance regulations (FDA cGMP, EU Annex 1, and military GJB defense doctrines) demand uncompromising moisture stability. In lyophilization, high-speed capsule encapsulation, and solid weapon propellants, seasonal relative humidity deviations directly result in batch contamination, loss of shelf life, and severe financial losses.
Enterprise Validation
Engineering Depth Proven at Scale
Founded in 2010, Hangzhou DryAir Treatment Co., Ltd. controls supply air down to -70°C dew point, ranking among the top desiccant dehumidification leaders globally.
-70°C
Minimum Dew Point Controllable
≥99%
NMP Solvent Recovery Rate
30%+
Domestic Industry Market Share
200+
Dehumidifier Units / Month
74
PhDs, Masters & HVAC Specialists
Tier-One Audited Supply Chains
Trusted by global brand leaders including Tesla, Northvolt, TTI, CATL, ATL, BYD, EVE Energy, Farasis, Envision, and SVOLT. Every enclosure and air-handling skid is engineered to survive exhaustive audits.
Comprehensive Export Certification
Fully compliant with international regional mechanical and electrical standards: CE (Europe), UL/CSA (North America), ASME code pressure vessel manufacturing, and EAC compliance for customs unions.
In-House Psychrometric Testing
Every commercial skid undergoes real-condition validation in our in-house testing chambers before international packing and ocean transport, ensuring design dew points are achieved instantly upon site startup.
Application Matrix
Localized Scenarios & Environmental Thresholds
Specifying moisture control requires aligning psychrometric rotor design with strict physical envelope dynamics, air-change rates, and latent staff loads.
| Target Industrial Application | Critical Dew Point / RH | Primary Moisture Risks Solved | Recommended System Architecture |
|---|---|---|---|
| Lithium-Ion Cell Assembly & Electrolyte Filling | -40°C to -60°C DP | Prevents hydrolytic formation of toxic HF gas and active material passivation | Turn-key Low Dew Point Dry Room + Desiccant Rotor |
| Solid-State & Next-Gen Lithium Metal Cells | -50°C to -70°C DP | Eliminates reactive corrosion of metallic lithium anodes during continuous stacking | Dual-Rotor Cascaded Industrial Dehumidifier Unit |
| Electrode Slurry Coating & Exhaust Drying | ≥99% Solvent Yield | Recovers expensive N-Methyl-2-pyrrolidone vapors and neutralizes hazardous emissions | ZJRH Series Condensation NMP Recovery Unit |
| Hygroscopic Pharma Powders & Gelatin Capsules | 10% to 30% RH (DP < -10°C) | Stops powder agglomeration, die-wall sticking, and shell deformities in high-speed blenders | Sanitary cGMP Rotary Desiccant Dehumidifier |
| Defense, Missile Silos & Ammo Warehouses | ≤40% RH (Stable Ambient) | Inhibits propellent hydrolyzation, fuse corrosion, and avionics electronic oxidation | GJB Military Standard Heavy-Duty Dehumidifier Skid |
| Petrochemical Terminals & Bulk Loading | Emission Threshold Compliance | Captures VOC vapors during tanker filling and petrochemical volatile transfers | Deep-Cooling Condensation + RTO Abatement Skid |
| Bulk Raw Material Storage & Pre-cooling | 45% to 60% RH | Prevents surface condensation and off-loads latent moisture before final drying zones | High-Efficiency Commercial Refrigerative Dehumidifier |
Execution Methodology
End-to-End Turnkey Delivery Model
A systematic, 5-stage project lifecycle that guarantees transparency, schedule certainty, and audited performance metrics from engineering consultation to stable mass production.
01. Consulting & Load Audit
Thermal and latent load analysis, air-leakage modeling, personnel density calculations, and supply air dew point definition based on actual client chemistry.
02. Psychrometric Design
Custom 3D CAD and CFD airflow layout, duct static pressure sizing, heat exchanger regeneration profiling, and BIM integration for architectural coordination.
03. In-House Manufacturing
Precision CNC metal sheeting, structural welding, insulated double-wall polyurethane panel construction, rotor assembly, and pre-commissioning chamber tests.
04. On-Site Erection & Start-Up
Deployment of specialist site supervisors, complete ducting and electrical hookup, enclosure pressure balancing, and dew point sensor calibration.
05. Lifecycle Support
Remote telemetry diagnostics, scheduled rotor maintenance, global spare parts fulfillment, and an optional 2-year overseas full-service agreement.
Future Tech Roadmap
Next-Generation Technology Roadmap & AI Integration
Discover how modern rotary systems are integrating AI predictive diagnostics, advanced desiccant matrices, and regenerative energy loops to lower industrial TCO.
AI Psychrometric Optimization
Embedding neural network micro-controllers directly into central PLC units allows predictive modulating of regeneration heaters. By correlating real-time weather forecasts, external humidity shifts, and internal shift changes, AI algorithms cut energy consumption by 18-27% without compromising dew point boundaries.
Advanced MOF & Ceramic Rotors
Moving beyond conventional active silica gel, DryAir is pioneering the integration of Metal-Organic Frameworks (MOFs) and high-density molecular sieve honeycomb composites. These materials achieve higher moisture adsorption capacities at lower desiccant reactivation temperatures (under 85°C vs 130°C conventional).
Closed-Loop Waste Heat Integration
Modern mega-facilities generate massive thermal loads from compressors and coater ovens. Next-generation DryAir engineering skids tap directly into industrial waste heat loops, eliminating redundant electrical or direct gas heating elements and delivering unprecedented overall plant efficiency.
Knowledge Center
Frequently Asked Questions by Global Engineering Teams
Clear, unvarnished technical answers regarding lowest controllable dew points, overseas turnkey contracting, export validation, and lifecycle service plans.
What is the lowest dew point a DryAir desiccant dehumidifier can achieve?
DryAir rotary desiccant dehumidifiers can reliably control process supply air down to a minimum of -70°C dew point (equivalent to less than 0.0033 grams of moisture per kilogram of dry air). This ultra-dry specification is critical for advanced lithium-ion cell winding, automated electrolyte filling, and next-generation solid-state battery fabrication.
Do you supply complete turnkey dry rooms outside China?
Yes. DryAir delivers end-to-end turnkey dry room EPC projects internationally—covering front-end consulting, envelope and HVAC design, equipment manufacturing, customs shipping, on-site mechanical erection, commissioning, and validation. We have successfully completed large-scale overseas dry room projects for clients including Tesla, Northvolt, and TTI.
Which international certifications do DryAir systems hold for export markets?
Depending on destination codes and equipment configurations, DryAir systems are supplied fully certified with CE marking (European Union Machinery, EMC, and Low Voltage directives), UL and CSA certifications (for the United States and Canada), ASME code compliance for pressurized vessels, and EAC certifications for the Eurasian Economic Union.
What recovery rate can a DryAir NMP recovery system reach?
DryAir NMP (N-Methyl-2-pyrrolidone) recovery systems achieve a verified solvent recovery rate of ≥99% on cathode continuous coating and drying exhaust lines. This closed-loop process dramatically reduces purchasing expenditure for expensive virgin solvents while maintaining exhaust emissions well below regional environmental limits.
What after-sales and on-site support is available for international buyers?
International clients receive comprehensive lifecycle coverage, including remote cloud-based telemetry assistance, global dispatch of factory commissioning engineers, and routine spare parts supply. In addition, customers can opt for our comprehensive 2-Year Extended Overseas Full-Service Agreement.
Product Catalog 02
Complete Engineered Environmental Systems
Select from our complete range of standardized and bespoke low-dew-point dehumidifiers, refrigerated condensation units, VOC scrubbers, and industrial air treatment machinery.
Desiccant
Standard Industrial Dehumidifier
Compact, skid-mounted desiccant dehumidification units engineered for fast integration into pharmaceutical clean rooms and testing laboratories.
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Enclosures
Precision Dry Enclosures
Airtight architectural wall paneling with custom interlock doors, pass-through chambers, and sealed structural ceiling matrices.
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Solvents
Closed-Loop NMP Condensers
Deep chilling heat exchangers designed specifically to prevent solvent vapor leakage and maximize pure liquid collection efficiency.
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Thermal RTO
High-Flow RTO Abatement Plants
Ceramic bed regenerative oxidizers transforming hazardous petrochemical and coating exhaust into clean, EPA-compliant carbon dioxide and water.
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cGMP Hygiene
cGMP Cleanroom Air Treatment
Internal smooth stainless-steel casings designed with full washdown capabilities to prevent microbial formation in bio-pharmaceutical suites.
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Military Spec
GJB Defense Air Dehumidifiers
Ruggedized, shock-resistant desiccant units built to stringent national military specifications for ammo bunkers and naval vessels.
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Electronics
Semiconductor Air Dryers
Ultra-stable micro-climate control designed for optical lithography, wafer fabrication, and clean warehouse staging areas.
View SpecificationsRefrigerative Pre-Cool Dehumidifier
High-efficiency mechanical refrigeration systems removing high latent loads ahead of downstream ultra-low desiccant rotors.
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Ready to Engineer Your Facility?
Request Detailed Engineering Psychrometrics & Catalog
Speak directly with our senior HVAC engineers to receive full psychrometric calculations, CAD dimensions, and competitive factory-direct pricing for your target project.