DP -70°C Stable
Desiccant Dehumidifier
DHU rotary desiccant dehumidifiers deliver reliable low-dew-point conditions down to -70°C for extreme process requirements.
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Trusted in Tier-1 Gigafactory & Defense Facilities:
Tesla
Northvolt
CATL
ATL
BYD
EVE Energy
Farasis
Envision
SVOLT
TTI
Direct Engineered Portfolio
High-Performance Industrial Dehumidification & Recovery Systems
Scalable moisture and chemical extraction platforms engineered to withstand mission-critical continuous operation across battery cells, pharmaceuticals, and precision cleanrooms.
Turnkey EPC
Turn-key Dry Room System
Complete airtight architectural dry rooms including envelope, air handling, low dew point systems, and computerized control.
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Efficiency ≥99%
NMP Recovery System
Captures N-Methyl-2-pyrrolidone solvent from battery electrode coating exhausts with over 99% pure recovery efficiency.
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Deep Cool + RTO
VOC Abatement System
Thermal oxidation (RTO) and deep condensation modules engineered to eliminate volatile industrial contaminants cleanly.
System Specs
Energy Efficient
Refrigerative Dehumidifier
High-capacity direct-expansion condensation dehumidifiers designed for bulk pre-cooling and storage warehouses.
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Solid-State Ready
Battery Dry Room Package
Full moisture barrier walls, specialized airlocks, and cascading pressure systems designed for lithium and sodium cell facilities.
Project Solutions
VOC Condensation
Oil Vapor Condenser
Multistage refrigerated condensing skids designed to capture petrochemical and solvent exhaust vapors prior to venting.
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Continuous Loop
Closed-Loop Recovery Tower
Precision distillation integrated loops ensuring solvent purity meets original battery grade requirements directly on site.
Solvent System
Industry Intelligence & Global Status
Global Landscape of China's Industrial Dehumidification Supply Chain
How Chinese engineering excellence has evolved from basic component assembly into the primary provider of mission-critical, gigawatt-scale environmental control systems globally.
-70°C
Minimum Controllable Dew Point
≥99%
NMP Solvent Purity Recovery
30%+
China Market Share Held
200+
Units Monthly Production Volume
Global Gigafactory Integration
Driven by the rapid scaling of EV battery production, China's industrial dehumidification manufacturers have emerged as essential engineering partners worldwide. Tier-1 battery makers demand gigawatt-scale air handling capable of drying hundreds of thousands of cubic meters per hour down to deep negative dew points.
Export to EU • NA • APACDecarbonization & Regeneration OPEX
Rotary desiccant systems traditionally consume substantial thermal energy for reactivation. Current technological trends focus on ultra-efficient heat recovery, high-cop refrigeration pre-cooling loops, and low-temperature waste heat desorbing, dramatically reducing operational expenditure (OPEX) for factory owners.
35% Energy Reduction OptionsGlobal Compliance Rigor
International deployment necessitates strict compliance with regional standards. Chinese leaders like Hangzhou DryAir maintain CE, UL, CSA, ASME, and EAC certifications, combined with domestic military-grade GJB systems, ensuring flawless safety audits and fast commissioning approval worldwide.
Full International Certifications
Critical Process Environments
Engineered Applications Where Failure Is Not an Option
Moisture control customized around chemical tolerance, product sensitivity, and process physics rather than off-the-shelf sizing charts.
Lithium & Solid-State Batteries
Moisture traces react instantly with fluorinated electrolytes, forming corrosive hydrofluoric acid (HF). We engineer multi-rotor cascading dry rooms maintaining supply air between -40°C and -70°C dew points across cathode preparation, cell winding, and electrolyte filling cleanrooms.
Target: -40°C to -70°C DPPharmaceutical & Biologics
Hygroscopic active pharmaceutical ingredients (APIs), effervescent formulations, and hard gelatine capsules clump and degrade under ambient relative humidity. Our systems deliver certified sanitary air handling with tight ≤10-20% RH control complying with international cGMP standards.
Target: 10% - 30% RH (GMP)Military & Aerospace Defense
Under China's GJB national military standard, our integrated environmental systems protect critical avionics, long-term guided missile stockpiles, and sensitive radar electronics from electrochemical corrosion, dielectric breakdown, and condensation degradation.
Target: ≤40% RH (GJB Rigor)Petrochemical & VOC Abatement
Large-scale hydrocarbon handling, fuel offloading, and industrial painting emit hazardous volatile organics. Our combined multi-stage condensation and Regenerative Thermal Oxidizers (RTO) achieve zero emissions while reclaiming valuable oil vapours efficiently.
Recovery: ≥99% Hydrocarbon
Buyer's Engineering Blueprint
Industrial Humidity & Dew Point Selection Matrix
Avoid over-engineering capital spend or under-specifying mission-critical thresholds. Compare core application dew points against recommended technological system architectures.
| Manufacturing Application | Target Environmental Condition | Recommended Technology Platform | Primary Operational Risk Mitigated |
|---|---|---|---|
| Lithium-Ion Cell Assembly & Electrolyte Injection | -40°C to -60°C Dew Point | Turn-Key Dry Room + Dual-Rotor Desiccant Skid | HF Acid generation, internal micro short-circuiting |
| Solid-State & Pure Lithium Metal Cells | Down to -70°C Dew Point | Custom DHU Series Desiccant Dehumidification | Violent moisture oxidation of lithium foil anodes |
| Cathode Slurry Coating & Exhaust Drying | ≥99% Solvent Capture | ZJRH Series NMP Solvent Recovery Skid | N-Methyl-2-pyrrolidone toxic emissions & operating loss |
| Pharmaceutical Dry Granulation & Capsule Filling | 10% to 30% Relative Humidity | Hygienic Desiccant Air Handling Unit | API agglomeration, capsule softening, mould spore proliferation |
| Military Armaments, Avionics & Ordnance Depots | ≤40% Relative Humidity | GJB-Compliant Low Dew Point Dehumidifier | Corrosion of firing pins, optical clouding, propellant breakdown |
| General Industrial Warehouses & Packaging Lines | 45% to 60% Relative Humidity | Refrigerative Direct Expansion Dehumidifier | Packaging warping, condensation formation, microbial growth |
| Bulk Fuel Loading & Chemical Storage Vents | Emission Standards Compliance | Deep-Cooling Condensation Skid + RTO | Explosion risks, volatile organic fugitive atmospheric emissions |
Authority • Provenance • Rigor
About Hangzhou DryAir Treatment Co., Ltd.
Founded in 2010, Hangzhou DryAir Treatment Co., Ltd. has established itself as an indisputable top-three rotary desiccant dehumidification innovator in China, holding greater than 30% domestic market share across gigafactory battery installations.
With a multidisciplinary technical division comprising 74 elite engineers, registered HVAC professionals, PhDs, and certified masters, DryAir engineers every system from thermodynamic first principles. Having directly delivered custom systems to global battery and technology pioneers including CATL, BYD, Tesla, Northvolt, ATL, and TTI, our team inherently understands and eliminates the critical failure risks international buyers worry about—envelope air infiltration, thermal bridging, personnel latent loads, and excessive regeneration electrical draws.
ISO 9001 & GJB Military Certified
CE • UL • CSA • ASME • EAC
In-House Performance Test Rooms
Turnkey Accountability
Five-Stage Project Implementation Model
A predictable, precision-audited project lifecycle bridging procurement expectations with on-site production realities.
Phase 01
Psychrometric Consulting
Comprehensive review of target air changes, envelope building leakage, equipment heat emissions, and personnel latent moisture loads.
Phase 02
Custom System Sizing
Thermodynamic CFD modeling, selection of desiccant media compositions (silica gel vs. molecular sieve), and heat integration design.
Phase 03
In-House Manufacturing
CNC sheet metal precision fabrication, specialized rotor assembly, and pre-commissioning load testing in climate validation chambers.
Phase 04
Global Site Erection
On-site ducting, cleanroom envelope installation, dynamic seal verification, and strict -70°C dew point validation protocols.
Phase 05
Lifecycle Protection
Optional 2-year overseas service SLA, IoT cloud telemetry diagnostics, spare parts stocking, and proactive seasonal recalibrations.
Technical Clarity
Frequently Asked Procurement & Engineering Questions
Direct technical clarifications on equipment capabilities, export readiness, and turnkey execution.
What is the lowest dew point a DryAir desiccant dehumidifier can achieve?
Hangzhou DryAir rotary desiccant dehumidifiers can reliably control supply air down to a minimum of -70°C dew point. This capability is critical for cutting-edge lithium cell manufacturing, solid-state battery R&D, electrolyte filling, and moisture-sensitive defense electronics.
Do you supply complete turnkey dry rooms for battery factories outside China?
Yes. DryAir provides complete turnkey EPC dry room deliveries internationally, encompassing upfront engineering consultation, structural airtight paneling, HVAC integration, desiccant machinery, automated controls, and on-site commissioning. We have successfully completed projects for global clients including Tesla, Northvolt, and TTI.
Which certifications do DryAir systems hold for European and North American markets?
Depending on model configurations and regional electrical/mechanical codes, DryAir products can be supplied fully certified under CE, UL, CSA, ASME, and EAC standards. Our factories operate under stringent ISO 9001 and the Chinese GJB national military standard quality frameworks.
What solvent recovery efficiency does a DryAir NMP recovery system achieve?
DryAir ZJRH series NMP recovery systems are engineered to achieve an overall N-Methyl-2-pyrrolidone solvent recovery rate equal to or greater than 99% from battery electrode coating exhaust lines, drastically reducing raw material purchasing costs while satisfying strict local VOC environmental emission thresholds.
What international post-installation service and warranty support is available?
International clients can secure an optional extended two-year service agreement alongside 24/7 remote IoT diagnostics, priority global spare parts dispatch, and on-site dispatch of certified DryAir HVAC engineers for commissioning and maintenance audits.
Procurement Quick Reference
Select Your Custom Industry Dehumidification Platform
Choose from our battle-tested lineup of desiccant dehumidifiers, NMP solvent recovery towers, and turnkey cleanroom architectures.
Modular Rotor
Desiccant Dehumidifier
Engineered for extreme moisture extraction in demanding battery and industrial cleanroom processes.
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Complete EPC
Turn-key Dry Room System
Full envelope airtight integration delivering steady -40°C to -70°C dew points reliably across large production footprint.
Dry Room Quote
Solvent Reuse ≥99%
NMP Recovery System
Reclaim process solvent directly on coating lines, minimizing chemical consumption and factory emissions.
Recovery Specs
Clean Exhaust
VOC Abatement System
Deep refrigeration condensation units coupled with high-efficiency RTO regenerative oxidizers.
Abatement Data
Condensation DX
Refrigerative Dehumidifier
Low-energy humidity reduction skids suitable for factory raw material warehouses and prep staging.
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Multi-Stage Rotor
Low Dew Point Rotor Skid
Dual-rotor cascade series for solid-state cell and chemical manufacturing demanding stable sub-zero dew points.
Technical Audit
Safe Hydrocarbon
Oil Vapor Condenser
Captures fugitive hydrocarbon fumes at petrochemical load racks with certified explosion-proof architecture.
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Modular Cleanroom
Turnkey Gigafactory Unit
Integrated desiccant cassettes and high-performance insulated wall barriers rapid-assembled on global sites.
Factory Systems