DP -70°C
Rotary Desiccant Dehumidifier
DHU series rotary systems engineered for continuous low dew-point deep drying where refrigeration systems cannot perform.
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Industrial Catalog Selection
Featured Industrial Dehumidification & Recovery Systems
Precision-engineered rotary desiccant platforms and solvent abatement systems optimized for extreme low dew points, gigafactory scale, and reduced operational expenditures.
DP -70°C
Turnkey EPC
Turn-key Dry Room System
Complete modular dry rooms including structural envelope, low-leakage ducting, controls, and commissioning for battery cell lines.
Explore System
Efficiency ≥99%
NMP Solvent Recovery System
ZJRH series capturing N-Methyl-2-pyrrolidone from coater exhaust, dramatically cutting raw chemical costs and emissions.
Inspect Specs
Cooling + RTO
Industrial VOC Abatement System
Deep condensation combined with regenerative thermal oxidizers (RTO) for chemical, automotive, and petroleum vapor treatment.
Abatement Data
Energy Saver
Refrigerative Dehumidifier
Cost-efficient moisture extraction for warehouse environments, pharmaceutical packaging stages, and pre-cooling cycles.
Technical Parameters
High Volume
Ultra-Low Dew Point Rotor Core
High-density silica gel and molecular sieve matrix delivering continuous air drying down to -70°C dew point without salt leakage.
Rotor Technology
Gigafactory Grade
Modular Cell Assembly Dry Rooms
Validated cleanroom integration with ultra-low dew point tolerances designed for next-generation solid-state and lithium-metal lines.
Project Case Studies
Emission Compliant
Oil & Gas Vapor Condenser
Cryogenic and high-efficiency condensation recovery systems controlling vapor discharge across chemical plants and fuel storage hubs.
Explore System◆ Tesla
◆ Northvolt
◆ CATL
◆ ATL
◆ BYD
◆ EVE Energy
◆ Farasis
◆ Envision AESC
◆ SVOLT
◆ TTI
◆ Tesla
◆ Northvolt
◆ CATL
◆ ATL
◆ BYD
◆ EVE Energy
◆ Farasis
◆ Envision AESC
◆ SVOLT
◆ TTI
Procurement Intent Analysis
Global Procurement Demands for China Desiccant Dehumidifiers
Across North America, Europe, and the Asia-Pacific, procurement leaders are shifting toward Chinese industrial desiccant dehumidifiers to solve capital expenditure bottlenecks without sacrificing psychrometric precision.
Capex Rationalization vs. Quality
Western engineering alternatives often come with severe price premiums and multi-quarter manufacturing lead times. Tier-one Chinese manufacturers provide mature, CE/UL/ASME certified equipment at 30% to 45% lower capital cost, accelerating ROI across multi-gigawatt battery plants.
Ultra-Low Dew Point Resiliency (-70°C)
Solid-state, high-nickel NMC, and lithium metal cell processing cannot tolerate moisture infiltration exceeding a fraction of a gram per kilogram of dry air. Global EPCs mandate desiccant wheels capable of operating stably at -50°C to -70°C dew point through seasonal humidity fluctuations.
Complete Single-Source Turnkey EPC
Procurement executives avoid fragmented multi-vendor interfaces. By contracting engineering, thermal load calculation, rotor fabrication, HVAC piping, and automated airlocks under one roof, project risks are drastically minimized during site commissioning.
-70°C
Minimum Dew Point Control
≥99%
NMP Solvent Recovery Rate
30%+
China Market Leadership Share
200+
Units Fabricated Monthly
74
PhDs, Engineers & Technicians
Industry Architectures
Macro Industry Solutions: Engineered for Critical Tolerances
Moisture is an aggressive chemical reactant in high-tech fabrication. Hangzhou DryAir engineers customized psychrometric systems designed around specific chemical threshold dynamics.
-40 to -70°C DP
Lithium Battery & ESS Gigafactories
Trace airborne humidity interacts with hexafluorophosphate electrolyte salts to form lethal hydrofluoric acid (HF), leading to capacity fading and catastrophic thermal runaway. Our dry room envelopes guarantee supply air down to -70°C DP across slitting, winding, and filling rooms.
Dry Room Solutions
GMP / 10-30% RH
Pharmaceutical & Biotechnology
Hygroscopic powders, effervescent tablets, soft gelatin encapsulation, and active pharmaceutical ingredient (API) synthesis degrade rapidly under uncontrolled relative humidity. We deliver certified cGMP dehumidification with non-shedding bactericidal desiccant rotors.
Pharma Dehumidifiers
GJB Defense Standard
Aerospace, Marine & Defense
Designed according to national military GJB benchmarks, these heavy-duty dehumidifiers prevent corrosion, preserve missile propellants, and protect complex avionic radar housings from oxidation in coastal or extreme maritime climates.
Defense Solutions
RTO Abatement
Chemical Plants & Bulk Fuel Terminals
Combining deep-chilling condensation with regenerative thermal oxidation (RTO) to strip volatile organic compounds and volatile hydrocarbon gases during loading, transferring, and processing operations to maintain environmental compliance.
VOC Abatement
Clean Process
Semiconductors & Optical Optics
Ultra-precise dew point and clean air class management prevent wafer bridging, oxidation of copper interconnects, and microscopic condensation in optical coating chambers.
Precision Industry
Closed-Loop Recovery
Electrode Slurry Coating Lines
Integrated solvent recovery loops with multi-stage condensing that capture ≥99% of evaporated NMP solvent, cleaning the process air and enabling high-purity distillation reuse on cathode production lines.
NMP Capture Specs
Engineering White Paper
Technical Roadmap & Energy Efficiency Horizons
Desiccant reactivation represents up to 70% of an industrial dry room's total energy footprint. Hangzhou DryAir's engineering innovations systematically address thermodynamic losses.
4-Stage Cascade Heat Regeneration
By recycling exhaust regeneration air heat through sensible heat wheels and waste heat fluid loops, system thermal efficiency is boosted by 32%, directly reducing boiler or electrical heater loads.
Zeolite & Ceramic Hybrid Rotors
Engineered with synthesized nano-porous molecular sieves chemically bonded to high-strength inorganic fiber substrate, preventing desiccant dusting and sustaining structural integrity past 10+ years of 24/7 run-time.
AI Dynamic Dew Point Modulation
Smart predictive psychrometric algorithms analyze production throughput, outdoor enthalpy, and operator density to automatically modulate rotor RPM and reactivation heat, preventing energy overshoot.
Ultra-Airtight Zero-Leakage Casings
Double-skin polyurethane insulated panels built with patented thermal-bridge-free profiles and airtight perimeter silicone seals deliver casing leakage rates below 0.3% under high positive static pressures.
Engineering Selection Guide
Dew Point & Humidity Specification Matrix
Specifying accurate moisture limits prevents capital misallocation. Compare industrial requirements and recommended equipment setups below.
| Manufacturing Application | Target Dew Point / RH | Moisture Risk Factor | Engineered Core System | Procurement Link |
|---|---|---|---|---|
| Lithium-Ion Cell Assembly & Filling | -40°C to -60°C DP | HF Acid generation, cell expansion & capacity loss | Turn-key Low Dew Point Dry Room System | Explore System |
| Next-Gen Solid State & Li-Metal Cells | Down to -70°C DP | Spontaneous exothermic degradation of lithium metal | Ultra-Low DP Rotary Desiccant Dehumidifier | Explore System |
| Cathode Slurry Drying & Solvent Exhaust | ≥99% Solvent Yield | Atmospheric VOC toxic emission & chemical waste | Closed-Loop NMP Solvent Recovery System | Explore System |
| Hygroscopic Pharma & Capsule Blistering | 10% – 30% RH | Powder caking, active ingredient degradation | GMP Hygienic Rotary Desiccant Dehumidifier | Explore System |
| Defense Munition & Avionics Warehousing | ≤40% RH | Oxidation, propellent instability, electrical corrosion | Military Standard Environmental Dehumidifier | Explore System |
| General Industrial Warehousing & Pre-cooling | 45% – 60% RH | Condensation sweating, mould growth, packaging collapse | Commercial Refrigerative Dehumidifier | Explore System |
| Petrochemical Terminals & Tank Vapor Flashing | Strict Emission Caps | Hydrocarbon venting, explosion hazards, regulatory fines | Deep-Cooling Condensation & RTO Abatement | Explore System |
Turnkey Execution
Five-Stage Industrial Delivery Architecture
From thermodynamic psychrometric modeling to overseas field acceptance validation, we own the full system lifecycle.
Stage 01
Consulting & Thermal Modeling
We calculate comprehensive moisture loads: envelope infiltration, fresh air introduction, personnel perspiration, and door cycling dynamics.
Stage 02
Psychrometric Design
Custom layout of air distribution plenums, rotor geometry, regeneration heat recovery exchangers, and high-efficiency fan static matches.
Stage 03
Fabrication & In-House Testing
Built in our Lin'an facility. Every unit undergoes airtightness verification and continuous dew point testing prior to export packing.
Stage 04
Erection & Site Commissioning
Hangzhou DryAir dispatch certified overseas installation engineers to manage dry room sealing, duct balancing, and SAT validation.
Stage 05
Lifecycle Support & SLA
Optional 2-year full-coverage warranty, global IoT remote diagnostics, rapid spare rotor provisioning, and regular sensor recalibration.
Audited Reliability
Localization Support, Global Codes & Certified E-E-A-T
Hangzhou DryAir Treatment Co., Ltd. operates with verified technical depth. Our multi-disciplinary engineering division bridges international compliance barriers.
Accredited Engineering Team
Our staff includes 6 PhD and Master’s level thermodynamicists, 2 National Registered HVAC Engineers, 8 senior engineers, and 58 certified field technicians capable of solving complex psychrometric dilemmas.
Global Export Certifications
We engineer electrical systems compliant with UL 508A and NFPA 79 for the US, CE Machinery & Low Voltage directives for the EU, CSA for Canada, ASME for pressure vessels, and EAC for Eurasian customs.
Localized On-Site Commissioning
Direct on-site engineering support for global deliveries (including past executions for Tesla, Northvolt, and TTI) supplemented with bilingual support, English schematic manuals, and localized parts warehousing.
Procurement Knowledge Base
Frequently Asked Questions by Global Buyers
Everything technical teams, project consultants, and global procurement managers need to verify before purchasing.
What is the lowest verifiable dew point DryAir desiccant dehumidifiers can achieve?
DryAir rotary desiccant dehumidifiers can reliably control supply air down to a minimum of -70°C dew point (equivalent to < 0.0033 g/kg humidity ratio). This is critical for next-generation solid-state lithium batteries, lithium-metal battery assembly, and electrolyte injection cleanrooms.
Do you deliver complete turnkey dry room systems outside of China?
Yes. Hangzhou DryAir delivers full turnkey EPC solutions globally. Our scope encompasses process consultation, psychrometric design, mechanical fabrication, airtight envelope installation, cleanroom integration, on-site commissioning, and performance verification. We have successfully completed dry rooms for overseas facilities belonging to Tesla, Northvolt, and TTI.
Which international certifications do DryAir systems carry for North American and European installation?
Depending on destination specifications, DryAir units can be engineered and stamped with CE, UL, CSA, ASME, and EAC certifications. The company operates under ISO 9001 quality management guidelines and China's stringent GJB national military standard system.
What solvent recovery efficiency is attained by your NMP recovery systems?
DryAir ZJRH series NMP recovery systems achieve a solvent condensation and capture yield exceeding ≥99% on lithium-ion battery electrode coating and drying lines, substantially cutting solvent purchasing expenditure and meeting global EPA VOC abatement limits.
How does DryAir maintain after-sales performance and field support overseas?
Overseas clients can take advantage of an optional two-year comprehensive service agreement. Our field support package includes on-site installation supervision, system SAT validation, expedited overseas spare parts logistics, and 24/7 remote IoT telemetry diagnostic assistance. Detailed information is available on our Global Service portal.
Complete Equipment Range
Explore DryAir's Core Product Lines
Full lifecycle engineering solutions trusted by CATL, BYD, Tesla, and tier-one battery manufacturers globally.
DHU Series
Desiccant Dehumidifier
Ultra-low dew point air treatment units with multiple heat regeneration sources including steam, electric, or natural gas.
View Specifications
Full EPC
Turn-key Dry Room System
Complete modular dry rooms engineered for battery gigafactories, military storage, and precision optical processes.
Explore Dry Rooms
ZJRH Series
NMP Recovery System
Advanced solvent recovery achieving over 99% collection efficiency on battery electrode drying exhausts.
Learn More
JEN Series
VOC Abatement System
Deep-cooling condensation coupled with RTO units to treat complex hazardous industrial emissions.
Learn More
Condensing
Refrigerative Dehumidifier
Energy-efficient refrigeration dehumidification for industrial storehouses, clean staging, and workshop pre-cooling.
Learn More
Deep Dry
Low Dew Point Air Handling Unit
High static pressure clean-room air handlers integrating multi-stage DX cooling coils and chemical filtering.
Air Handler Specs
Custom Built
Industrial Desiccant Skid Systems
Pre-commissioned plug-and-play dehumidifier skids with integrated chillers, piping, and automated PLC control cabinets.
Skid Engineering
Cryogenic Condensing
Condensation Vapor Recovery Unit
Specialized cryogenic condensation modules engineered for hazardous atmosphere gas recovery and emission reduction.
Vapor Recovery Data
Technical Publications
Articles & Field Case Studies from Our Engineers
Gain practical knowledge on solvent recovery dynamics, continuous dry room psychrometrics, and pharmaceutical moisture hazard mitigation.
How Does an Oil Gas Condensation Recovery System Work
Oil gas condensation recovery systems help fuel storage and handling facilities capture oil vapors during tank filling, loading and unloading before they are released into the atmosphere.
Read Full Study
How to Maintain Stable NMP Recovery Performance in 24/7 Operations
NMP is widely used in electrode slurry preparation and coating. Learn how to keep recovery efficiency stable, reduce solvent loss, and control stack emissions in round-the-clock production.
Read Full Study
What Problems Can Excess Humidity Cause in Drug Manufacturing
From powder processing to tablet compression, capsule filling, and blister packaging, excess moisture degrades product efficacy and clogs high-speed tooling. Here is how to prevent it.
Read Full Study
Direct Factory RFQ
Request Engineering Specifications & Factory Sizing
Download our comprehensive engineering catalogs, complete airflow diagrams, moisture load calculation tools, and project reference lists.