DP -70°C
Desiccant Dehumidifier
DHU series rotary desiccant dehumidifiers deliver stable low-dew-point air down to -70°C where conventional refrigeration fails.
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Direct Product Showcase 01-08
Featured Industrial Climate Control & Recovery Systems
Explore our primary engineered environmental test chambers, ultra-dry rotary air handlers, and emission abatement units built for demanding production requirements.
Turnkey EPC
Turn-key Dry Room System
Complete environmental test and assembly enclosure including architectural wall panels, HVAC systems, and air balancing validation.
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≥99% Recovery
NMP Recovery System
Recovers N-Methyl-2-pyrrolidone solvent vapors directly from electrode coater lines, drastically cutting raw material costs.
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Cooling + RTO
VOC Abatement System
Deep-cooling condensation integrated with Regenerative Thermal Oxidation (RTO) for extreme environmental compliance.
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Pre-Cooling
Refrigerative Dehumidifier
Engineered pre-cooling and bulk moisture rejection systems designed to protect workshops and stabilize primary supply air.
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Military Spec
Defense & Avionics Test Room
Hardened climate simulation suites built to GJB military requirements for weapon systems, guidance optics, and avionics testing.
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GMP Grade
Pharma Climate Test Chamber
Sanitary precision climatic chambers for active pharmaceutical ingredient (API) processing, effervescent tableting, and packaging.
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Vapor Recovery
Hydrocarbon Vapor Recovery Unit
Specialized deep-condensation test and capture infrastructure tailored for petrochemical terminals and chemical storage facilities.
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Executive White Paper • Global Trends
Global Macro Trends & Industrial Climate Control Demands
From solid-state EV battery manufacturing to semiconductor metrology, modern production yield directly hinges on milligram-level absolute humidity stability.
Lithium & Solid-State Battery Shift
Next-generation lithium-metal, silicon-anode, and solid-state sulfide electrolytes degrade rapidly upon contact with ambient moisture, hydrolyzing into toxic hydrogen fluoride (HF) gas. Standard -40°C dew point tolerances are being displaced by strict -50°C to -70°C dew point requirements across all filling and winding stages globally.
Decarbonization & Regeneration OPEX
Running industrial desiccant rotors consumes substantial thermal energy. Modern plant engineering requires waste-heat utilization, closed-loop heat pump regeneration, and variable-frequency airflow modulation to cut plant electricity consumption by up to 35% under stringent ESG protocols in Europe and the Americas.
Stringent Cleanroom Enclosure Tolerances
A test chamber is only as effective as its physical containment. Structural micro-leakage at wall joints, airlocks, and electrical pass-throughs introduces latent moisture loads. Turnkey envelope engineering, airtight gasket designs, and dynamic pressure gradients (+20 to +50 Pa) ensure total atmospheric isolation.
-70°C
Min Controllable Dew Point
≥99%
NMP Solvent Recovery Rate
30%+
China Desiccant Market Share
200+
Units Monthly Production
74
R&D PhDs & Master Engineers
E-E-A-T Quality Assurance
Engineering Depth You Can Audit Globally
Hangzhou DryAir Treatment Co., Ltd. (founded 2010) combines GJB national military manufacturing rigor with global export accreditation for tier-1 supply chains.
Tier-1 Validated Track Record
Delivering turnkey dry rooms and rotor systems for the world's most demanding gigafactories: Tesla, Northvolt, CATL, ATL, BYD, EVE Energy, Farasis, Envision, SVOLT, and TTI.
Harmonized Multi-Region Certification
Engineered from the ground up to comply with regional electrical and pressure vessel codes: CE (Europe), UL/CSA (North America), ASME boiler standards, and EAC (Eurasia).
Full-Scale In-House Factory Audits
Every DHU unit and test chamber module is verified inside our dedicated performance testing room before shipment, offering video witnessing and complete psychrometric reporting.
Engineering Selection Matrix
Localized Application Scenarios & Target Parameters
Specifying the wrong dew point tolerance creates severe cost overruns or terminal product defects. Use this reference matrix to evaluate system requirements across target sectors.
| Application Scenario | Critical Moisture Risk | Target Humidity / Dew Point | Recommended Configuration |
|---|---|---|---|
| Lithium-Ion Cell Assembly & Electrolyte Filling | Moisture reacts with LiPF6 forming HF acid; cell swelling and rapid capacity fading. | -40°C to -60°C DP | Turnkey Dry Room + Dual-Rotor Desiccant System |
| Solid-State & Lithium-Metal Next-Gen R&D | Extreme pyrophoric reactivity with ambient moisture; immediate anode surface oxidation. | Down to -70°C DP | Ultra-Low DP Desiccant Unit + Low-Leak Enclosure |
| Cathode Coating & Exhaust Air Handling | Volatile NMP solvent emission into the environment and extreme operational solvent losses. | ≥99% Recovery Rate | ZJRH Series Condensation & Zeolite Adsorption NMP Unit |
| Hygroscopic Pharma Powders & Packaging | Powder clumping, capsule degradation, active substance hydrolysis, mold proliferation. | 10% - 30% RH | Sanitary GMP Desiccant Air Handling Unit |
| Defense, Guided Ordnance & Aerospace | Micro-galvanic corrosion on avionics, propellant degradation, optical fogging. | ≤40% RH / GJB Certified | Hardened Military-Spec Industrial Climate Chambers |
| Semiconductor Photolithography & Cleanroom | Sub-micron moisture droplets causing wafer surface hazing and electrostatic discharge. | 35% - 45% RH ±1% | Precision High-Sensible Cleanroom Climate Unit |
| Petrochemical Bulk Terminals & Fuel Racks | Hydrocarbon flash vapor escape violating volatile organic emission standards. | Vapor Limits / ATEX | Deep-Cooling Condensation + RTO Abatement System |
End-to-End Execution
Turnkey EPC Delivery: From Psychrometric Model to Commissioning
Eliminate accountability gaps between enclosure builders and HVAC contractors. One engineering partner delivers guaranteed dew point performance.
01. Psychrometric & Latent Audit
Detailed analysis of personnel count, exhaust flow rates, airlock transit cycles, and structural transmission loads to define the exact latent removal capacity needed.
02. Integrated Enclosure & Rotor Design
3D BIM coordination of supply/return ducts, thermal break wall envelopes, anti-static flooring, and dual-rotor series dehumidification architecture.
03. In-House Manufacturing & FAT
Precision rotor casing assembly, electrical cabinet wiring under UL/CE standards, and full factory acceptance testing inside our Lin'an testing chamber.
04. On-Site Erection & Commissioning
Global deployment of DryAir certified field supervisors to oversee joint caulking, pressure equalization, sensor calibration, and steady-state dew point burn-in.
05. Validation & 2-Year SLA Support
Rigorous multi-point chilled-mirror dew point logging across all operational zones, backed by remote diagnostic telemetry and comprehensive overseas spare parts coverage.
Zero Performance Margin of Error
By retaining complete fabrication oversight of both the mechanical air handlers and structural chamber walls, we guarantee -70°C DP without vendor finger-pointing.
Innovation Roadmap
Next-Gen Technological Milestones (2025–2030)
Discover how DryAir R&D is solving the energy intensity challenge of ultra-low dew point generation through advanced material chemistry and AI automation.
Hybrid MOF Desiccant Rotors
Transitioning from standard silica gel and molecular sieves to Metal-Organic Frameworks (MOFs). MOF-coated wheels permit desorption at temperatures below 85°C, tapping directly into low-grade industrial waste heat and reducing regeneration energy by up to 40%.
AI Predictive Moisture Load Tuning
Integrating machine learning algorithms into the PLC architecture. Real-time predictive modeling anticipates shifts in ambient weather fronts, worker shift handovers, and coater cycle purges to trim heater power dynamically without risking dew point spikes.
Closed-Loop Circular Solvent Systems
Coupling our ≥99% NMP recovery condensators with continuous online purification distillation units, enabling closed-loop battery factories that reuse over 95% of purified battery solvent on-site with zero atmospheric venting.
Buyer Knowledge Base
Frequently Asked Technical Questions
Common psychrometric, operational, and commercial questions answered directly by DryAir HVAC and process engineering teams.
What is the lowest dew point a DryAir desiccant dehumidifier can achieve? +
DryAir rotary desiccant dehumidifiers can control supply air down to a minimum of -70°C dew point (equivalent to < 0.0033 g/kg absolute moisture content). This ultra-dry air envelope is specifically engineered for solid-state battery development, lithium cell electrolyte filling, and moisture-sensitive defense systems where ordinary refrigeration freezes out.
Do you supply complete turnkey dry rooms for battery factories outside China? +
Yes. DryAir delivers end-to-end turnkey dry room projects covering pre-sales consulting, psychrometric system modeling, enclosure design, cleanroom panel manufacturing, on-site installation, and final dew point validation. We have successfully deployed systems for overseas projects including Tesla, Northvolt, and TTI.
Which certifications do DryAir systems hold for European and American export markets? +
Depending on model and destination specifications, DryAir products can be supplied with full CE, UL, CSA, ASME, and EAC certifications. Our manufacturing plant operates under an ISO 9001 certified quality management system and the rigorous GJB national military standard quality system.
What solvent recovery efficiency does a DryAir NMP recovery system reach? +
DryAir NMP recovery systems are guaranteed to achieve a solvent recovery rate above 99% on lithium-ion electrode coating and drying lines. This setup drastically lowers ongoing N-Methyl-2-pyrrolidone procurement expenditure while maintaining full compliance with strict regional volatile organic compound (VOC) emission caps.
What after-sales service and spare parts support is available for international buyers? +
International clients receive comprehensive remote diagnostics via IoT-connected controllers, emergency spare parts provisioning, and on-site engineering dispatch. Furthermore, overseas customers can select an optional two-year turnkey maintenance agreement covering scheduled inspections, rotor efficiency re-checks, and sensor recalibration.
Direct Product Showcase 09-16
Explore Complete Engineered Systems & Configurations
Select from our complete range of humidity and solvent processing units configured for industrial scale, continuous operation, and rigorous environmental compliance.
Desiccant Tech
Desiccant Dehumidifier
Ultra-low dew point air system featuring energy-saving heat recovery regeneration loops for continuous factory dehumidification.
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Airtight Shell
Turn-key Dry Room System
Comprehensive climatic enclosure suites engineered with hermetic joints, double-airlock chambers, and positive pressure air delivery.
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Clean Exhaust
NMP Recovery System
High-efficiency condensing chiller and adsorption wheel system capturing toxic solvent vapors with recovery rates surpassing 99%.
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Thermal RTO
VOC Abatement System
Integrated regenerative thermal oxidation systems built for eliminating hazardous emissions and complex hydrocarbon waste gases.
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Refrigerative
Refrigerative Dehumidifier
Primary stage refrigeration air dryers providing cost-effective moisture management across high-volume assembly lines and warehouses.
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Gigafactory Scale
Mega-Scale Battery Dry Room
Engineered for 10GWh+ battery production phases with parallel duct configurations and zoned humidity management down to -65°C DP.
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Clean API Safe
Pharma Cleanroom Unit
Sanitary stainless casing and HEPA filtered air supply meeting European GMP Class A/B requirements for hygroscopic medication packaging.
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Petro Safe
Petrochemical Vapor Condenser
Heavy-duty refrigeration recovery systems designed to condense explosive petrochemical vapors during tank loading and rail rack transit.
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Engineering Consultation
Plan Your Climatic Test Room Tender With DryAir
Request detailed psychrometric sizing diagrams, airflow schematics, and an audited bill of materials customized to your exact room geometry and dew point target.