DP -70°C
Desiccant Dehumidifier
DHU rotary units engineered for deep moisture removal far beyond refrigeration limits, securing ultra-low dew point air.
View SpecificationsEngineering Partner to Tier-1 Gigafactories & Advanced Tech Leaders
Tesla
Northvolt
CATL
ATL
BYD
EVE Energy
Farasis
Envision
SVOLT
TTI
Primary Engineering Lines
High-Integrity Climate Control Equipment (Batch 1)
Explore our core rotary desiccant systems, solvent extraction packages, and custom enclosure technologies engineered to eliminate latent moisture and optimize operational expenses.
DP -70°C
Turnkey EPC
Turn-key Dry Room System
Modular airtight enclosures, structural plenum ceilings, air showers, and integrated desiccant air treatment delivered end-to-end.
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Recovery ≥99%
NMP Recovery System
ZJRH series high-efficiency solvent condensation that recycles electrode coater solvent emissions while lowering carbon footprints.
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Cooling + RTO
VOC Abatement System
Integrated cryogenic condensation coupled with regenerative thermal oxidation (RTO) for extreme industrial emission control.
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Energy Saver
Refrigerative Dehumidifier
High-capacity sensible heat cooling and primary stage condensation dehumidifiers for warehouse and factory pre-treatment.
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Ultra Clean
Battery Assembly Dry Chambers
Controlled air delivery systems specifically customized for prismatic, pouch, and cylindrical cell automated assembly bays.
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Coating Focus
Electrode Coating Clean Module
Precision exhaust capture integrating heat exchangers to cut thermal losses on high-speed continuous roll-to-roll coaters.
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Core Rotor
Specialized Rotor Dry Packages
High-grade composite metal silicate and molecular sieve rotors designed for harsh chemical atmospheres and continuous cycling.
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Industry Macro Insights
Macro Industry Solutions & The Global Manufacturing Paradigm
Advanced temperature and humidity controlled rooms are no longer merely facilities ancillaries; they represent critical yield and safety determiners in the global electrification and bio-pharmaceutical transitions.
Lithium & Solid-State Battery Gigafactories
Trace ambient moisture directly hydrolyzes LiPF6 electrolytes into corrosive hydrofluoric acid (HF), compromising cathode interfaces and causing severe thermal runway hazards. Our turnkey systems guarantee continuous dew points from -40°C down to -70°C across mega-enclosures exceeding 100,000 m³.
-70°C Dew Point
Solid State Ready
Zero Air Bypass
Bio-Pharma & cGMP Cleanroom Precision
Hygroscopic formulation, active pharmaceutical ingredient (API) synthesis, and dry powder inhaler (DPI) filling require tight relative humidity thresholds (10% to 20% RH ±1%) at 20°C to eliminate micro-caking, verify tablet compaction stability, and maintain strict microbiological barriers.
cGMP Compliant
FDA 21 CFR Part 11
Sanitary Enclosures
Aerospace, Defense & Avionics Protection
Operating under rigorous GJB military standard quality management systems, our deep dehumidification systems protect composite curing chambers, high-density missile guidance avionics, and radar instrumentation assemblies from internal galvanic corrosion and delamination.
GJB Standard
Corrosion Prevention
Mission Critical
Industrial Capability Dashboard
Engineering Depth, High Throughput & Global Footprint
Hangzhou DryAir Treatment Co., Ltd. (established in 2010) ranks among China's top three desiccant manufacturers, delivering measurable operational superiority backed by continuous laboratory verification.
-70°C
Minimum Process Dew Point
≥99%
NMP Solvent Recovery Rate
30%+
Domestic Industry Market Share
200+
Systems Produced Per Month
In-House R&D and Verification Laboratory
Our facility features an internal full-scale psychrometric validation chamber equipped with multi-point chilled mirror hygrometers, mass spectrometers, and thermal imaging diagnostics. Every system destined for overseas shipment undergoes full load factory acceptance testing (FAT) before container loading.
74 Senior Engineering Specialists
Backed by 6 staff holding doctoral and master's degrees in HVAC and thermodynamics, 2 registered national HVAC engineers, 8 senior engineers, and 58 licensed electro-mechanical technicians providing specialized oversight on projects globally.
Export & Compliance Framework
Localized Support & International Regulatory Assurance
Deploying specialized climate-controlled infrastructures across Europe, North America, Southeast Asia, and the Middle East requires adherence to regional codes and rapid field mobilization.
Multi-Jurisdiction Certification
All exported dry room units can be engineered to comply fully with CE Machinery and Low Voltage Directives, UL 1995/UL 60335 electrical codes for the United States, CSA C22.2 for Canada, ASME pressure vessel standards, and EAC certification for the Eurasian Economic Union.
Localized Field Service Engineering
We deploy factory-certified field technicians directly to overseas job sites for mechanical assembly oversight, duct tightness verification, pneumatic leakage tests, control loop PID tuning, and Dew Point Guarantee Validation alongside client validation teams.
Continuous Remote Telemetry & SLA
Our intelligent IoT gateway continuously tracks regeneration temperatures, rotor rotation velocity, pressure differentials, and chilled water balance. Clients benefit from guaranteed 2-hour response windows and an optional comprehensive 2-year overseas warranty program.
Engineering Matrix
Dew Point & Environmental Control Selection Matrix
Selecting the exact psychrometric target is crucial to avoiding over-capitalization while preventing irreversible quality failures in production.
| Industrial Application / Process Zone | Process Dew Point (DP) / RH Target | Critical Failure Risk Prevented | Recommended System Architecture |
|---|---|---|---|
| Lithium-Ion Cell Assembly & Electrolyte Filling | -40°C to -60°C DP | Electrolyte hydrolysis and toxic hydrofluoric acid gas generation | Turn-key Low Dew Point Dry Room System |
| Solid-State & Next-Gen Lithium Metal Cells | -60°C to -70°C DP | Immediate oxidation of metallic lithium anodes and sulfide precursors | Double-Rotor Deep Desiccant Dehumidifier |
| Electrode Slurry Coating & Drying Recovery | ≥99% Solvent Recovery | Volatile NMP solvent emissions, loss of expensive materials | ZJRH Series Condensation NMP Recovery Unit |
| Hygroscopic Active Pharmaceuticals & Tablets | 10% to 25% RH (at 21°C) | Powder clumping, capsule softening, microbial outgrowth | Sanitary cGMP Desiccant Air Handling Unit |
| Military Munitions & Avionics Deep Storage | ≤35% RH (Ambient) | Internal corrosion of electronic boards and propellant degradation | DHU Heavy-Duty Rotary Dehumidifier |
| Semiconductor & Optical Thin-Film Deposition | 30% to 45% RH (±1%) | Electrostatic discharge (ESD) and dielectric thin-film defects | Combined Refrigerative & Desiccant Precision Unit |
| Bulk Chemical Storage & Tank Loading Terminals | EPA VOC Discharge Limits | Atmospheric solvent leakage and non-compliance fines | Cryogenic Condensation + Regenerative Thermal Oxidizer |
Structured Delivery
End-to-End Turnkey Execution Model
A single point of engineering responsibility guarantees precision alignment across civil integration, thermal load modeling, duct fabrication, and cleanroom commissioning.
01. Latent Load Analysis & Psychrometrics
We perform rigorous calculations incorporating operator personnel moisture generation, airlock door-opening infiltration rates, building envelope transmission, and process equipment exhaust balances.
02. Thermodynamic Design & Air Distribution
CFD modeling simulates velocity contours, static pressure differentials, and thermal gradients across the room to prevent stagnant air pockets and condensation risk around high-heat machinery.
03. In-House Precision Manufacturing
Air handling structures, thermal-break double-skin wall panels, direct-drive blowers, and silica gel / molecular sieve desiccant rotors are produced under strict ISO 9001 and GJB quality supervision.
04. On-Site Erection & System Commissioning
Factory engineers oversee airtight envelope panel sealing, duct pressure decays, air leakage testing according to ISO 14644, balance valves, and conduct deep dew point pull-down trials.
05. Validation, Handover & Lifecycle Support
Complete documentation packages including IQ/OQ validation protocols, calibration reports, spare parts consignments, operator training, and 24/7 telemetry monitoring integration.
Guaranteed Project Turnaround
Our robust supply chain and parallel manufacturing framework enable gigafactory scale projects to go from finalized psychrometric drawings to factory dispatch in as little as 10 to 14 weeks.
Future Technology Vector
Engineering Roadmap & Future Energy Transitions
Because humidity management in battery gigafactories represents up to 40% of total cleanroom energy consumption, our R&D roadmap focuses on next-generation desiccant chemistry and thermal cascading.
Phase 1: Present Core
Waste Heat Regeneration Integration
Coupling low-grade compressor waste heat and boiler steam recovery to power rotor reactivation coils, cutting electric heating demands by 35% to 50%.
Phase 2: Transition
Advanced MOF Desiccant Rotors
Metal-Organic Framework (MOF) composite rotors capable of desorbing water molecules at reactivation temperatures below 75°C, revolutionizing low-carbon dry rooms.
Phase 3: Scaling
Solid-State -80°C Micro-Environments
Developing localized extreme-dry mini-environments and isolator enclosures to achieve stable -80°C dew point zones with minimal airflow volumetric waste.
Phase 4: Intelligence
AI-Driven Predictive Psychrometrics
Machine learning models that anticipate outdoor ambient wet-bulb spikes and factory production shifts to modulate fan frequency and regeneration inputs proactively.
Export Equipment Portfolio
High-Integrity Climate Control Equipment (Batch 2)
Our complete machinery line designed for international export, supported by on-site commissioning, full documentation packages, and multi-year warranties.
Lithium Ready
Industrial Desiccant Module
High-efficiency desiccant air treatment system engineered for pharmaceutical cleanrooms and battery dry processing corridors.
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Airtight Panel
Modular Dry Room Enclosures
Interlocking PIR / Rockwool cleanroom wall and ceiling panels guaranteeing sub-zero air infiltration and strict thermal boundaries.
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Recovery Loop
Electrode Coater Recovery System
Dual-stage condensing heat exchange skids recovering N-Methyl-2-pyrrolidone vapors with continuous purity monitoring.
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Clean Air
Regenerative Thermal Oxidizer (RTO)
Multi-bed ceramic regenerative thermal oxidizers reaching over 99.2% VOC destruction efficiency at minimal fuel expense.
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High Capacity
Refrigerative Pre-Treatment Skids
Heavy-duty scroll and screw compressor mechanical cooling stations tailored to remove bulk ambient moisture ahead of rotors.
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Airlock Air Shower
Ultra-Dry Ingress Airlocks
Fast-cycling interlocked airlock vestibules designed to purge moisture before personnel or AGV machinery cross clean boundaries.
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Distillation
Solvent Distillation Towers
Integrated post-condensation distillation units delivering recovered NMP solvent purities acceptable for direct cathode batch reuse.
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Complete Package
Integrated Precision AHU System
All-in-one climate control skids housing pre-cooling, desiccant wheel, reheat coils, HEPA filtration, and Allen-Bradley / Siemens PLC.
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Technical & Commercial Clarifications
Frequently Asked Questions for International Procurement
Direct technical answers addressing system integration, dew point guarantees, international transport, and post-commissioning maintenance.
What is the absolute lowest dew point a DryAir desiccant dehumidifier can guarantee in continuous operation? +
DryAir rotary desiccant dehumidifiers are guaranteed to control supply air down to a minimum of -70°C dew point (equivalent to less than 0.002 grains of moisture per pound of dry air). This level is essential for high-energy density lithium cell assembly, automated pouch sealing, and solid-state battery development where any ambient moisture would initiate dangerous exothermic reactions.
Does Hangzhou DryAir provide comprehensive turnkey delivery outside of China? +
Yes. DryAir provides end-to-end turnkey EPC services across Europe, North America, Southeast Asia, and beyond. Our turnkey contracts encompass initial thermodynamic modeling, civil coordination, air handling system design, enclosure panel manufacturing, ocean freight staging, local mechanical installation supervision, commissioning, and validation testing. We have successfully completed dry room projects for clients including Tesla, Northvolt, and TTI.
Which global industrial certifications are accompanied with your export machinery? +
Depending on destination requirements, DryAir systems can be configured to comply with CE (Machinery, Low Voltage, and EMC Directives), UL 1995 / UL 60335 for the US market, CSA C22.2 for Canada, ASME Boiler and Pressure Vessel Code for heat exchangers, and EAC for the Eurasian customs zone. The company's manufacturing operates under an ISO 9001 certified quality management system and the GJB national military standard system.
How does an NMP recovery system achieve a ≥99% solvent recovery rate? +
Our ZJRH series utilizes a patented multi-stage cooling condensation matrix. Exhaust gases coming from cathode drying ovens are first put through an air-to-air energy recovery core, followed by chilled water primary condensations and closed-circuit deep chilling. This staged drop causes NMP vapors to precipitate out smoothly, achieving ≥99% solvent capture while returning clean, dry air back into the coater ovens.
How do you support overseas customers with after-sales service and spare parts? +
Overseas clients can opt for our comprehensive two-year service agreement. In addition to on-site commissioning by DryAir mechanical engineers, our systems feature encrypted remote telemetry for diagnostics, 24-hour technical response, and standard critical component stock (such as bearings, drive belts, and sensor probes) ready for immediate international air dispatch.
Can DryAir desiccant equipment integrate with client-specified PLC and SCADA standards? +
Yes. We routinely engineer industrial control enclosures utilizing Siemens S7-1500, Allen-Bradley (Rockwell), or Mitsubishi PLCs, paired with matching HMIs and standard communication protocols including Profinet, Modbus TCP/IP, and Ethernet/IP for seamless central SCADA integration.