Engineered Rotary Desiccant & Environmental Systems
Precision environmental equipment engineered by Hangzhou DryAir to guarantee stable psychrometric performance in extreme manufacturing regimes.
DP -70°C
DHU Rotary Dehumidifier
High-efficiency desiccant wheel system providing continuous ultra-dry air for battery assembly and precision chemical processing.
View Specifications →
Turnkey EPC
Turn-Key Dry Room System
End-to-end dry room enclosure, structural sealing, duct integration, and air management verified down to -70°C dew point.
Explore Dry Rooms →
Recovery ≥99%
NMP Solvent Recovery System
Closed-loop condensation recovery designed for electrode coating lines, reducing solvent purchasing overhead and emissions.
System Details →
Cooling + RTO
VOC Abatement System
Deep-cooling condensation coupled with Regenerative Thermal Oxidizers (RTO) for extreme solvent exhaust compliance.
Inspect Abatement →
Silica/Zeolite
Modular Desiccant Unit
Factory-assembled modular dehumidification cassettes featuring dual-rotor cascades and proprietary peripheral silicone seals.
Modular Units →
Cleanroom ISO 5-8
Gigafactory Clean Dry Room
Heavy-duty HVAC integration supporting parallel gigawatt assembly lines with strict psychrometric stability and low air leakage.
Engineering Specs →
Heat Recovery
High-Efficiency NMP Plant
Integrated waste-heat recovery exchange systems designed to drastically diminish thermal energy consumption on coating runs.
Solvent Recovery →
Pre-Cooling Stage
Refrigerative Dehumidifier
Heavy industrial condensing dehumidifier operating as high-efficiency moisture removal before deep desiccant wheel polishing.
View Pre-Coolers →Engineering Ultra-Dry Microclimates: The Science of Desiccant Adsorption
In modern high-yield manufacturing—such as electric vehicle (EV) lithium-ion battery cells, solid-state electrolytes, biopharmaceuticals, and precision optical sensors—ambient atmospheric moisture is an insidious destructive agent. In lithium cell manufacturing, water molecules react hydrolytically with LiPF6 electrolyte salts to generate hydrofluoric acid (HF), causing irreversible active material degradation, cell swelling, and disastrous thermal runaway risks. Maintaining an ultra-dry atmosphere with a dew point between -40°C and -70°C is therefore not an option; it is an uncompromising industrial imperative.
Founded in 2010, Hangzhou DryAir Treatment Co., Ltd. has risen to become China's premier designer and manufacturer of rotary desiccant dehumidifiers and turnkey dry room systems. Commanding more than 30% market share in China's gigafactory sector and holding top-tier status globally, DryAir bridges fundamental sorption thermodynamics with advanced industrial scale.
Unrivaled Scale, Integration & Cost-to-Performance Leadership
Discover how Hangzhou DryAir's massive ecosystem delivers gigafactory-speed rollouts without sacrificing precision engineering.
200+ Units Monthly Throughput
Our Lin'an, Hangzhou industrial base provides full-chain manufacturing capabilities—from sheet metal laser fabrication and automated structural welding to precise rotor assembly and PLC control cabinet programming, guaranteeing zero bottlenecking during massive plant expansions.
35-45% CAPEX Efficiency
By leveraging China's dense upstream supply chain for precision refrigeration compressors, high-grade centrifugal blowers, and specialized honeycomb adsorption media, DryAir provides capital cost advantages of 35-45% compared to Western legacy OEM incumbents.
Full In-House Performance Testing
Every industrial unit undergoes rigorous simulated climate stress tests inside our full-scale testing center. We benchmark enthalpy balances, seal differential pressures, and deep dew point suppression before any crate leaves the facility floor.
International Certifications & Field Support Protocols
Eliminating international procurement risk through rigid regulatory compliance and on-site engineering accountability.
Multinational Certifications
Turnkey assemblies are certified to European CE (Machinery & Low Voltage Directives), North American UL 1995 / CSA C22.2 standards, ASME pressure vessel codes, and Eurasian EAC requirements.
On-Site Expatriate Engineers
We dispatch certified commissioning engineers globally to oversee duct assembly, structural airtightness verification, sensor calibration, and SAT (Site Acceptance Testing) protocols.
Optional 2-Year Overseas Service
Comprehensive service agreements encompass complete mechanical warranty, guaranteed 24-hour response logistics for critical rotor seals, heating elements, and preventative psychrometric audits.
IoT Remote Diagnostics
Secure real-time telemetry monitors regeneration inlet/outlet temperatures, wheel rotation torque, pressure drops across desiccant beds, and immediate dew point drift warning flags.
Mitigating Critical Risks for Tier-1 Global Manufacturers
How DryAir engineers solve the primary technical challenges faced by plant procurement teams and EPC contractors.
OPEX Escalation & Energy Recovery
Desiccant regeneration consumes significant thermal energy. DryAir deploys patented waste heat recovery coils, direct exhaust recirculation, and split reactivation sectors that slash thermal input requirements by 25% to 38%.
Air Leakage & Cross-Contamination
Inferior seals allow humid reactivation air to contaminate the process stream. DryAir utilizes four-point adjustable viton-silicone dual seals with positive-pressure purge zones, guaranteeing under 0.1% cross-leakage across ΔP exceeding 2000 Pa.
Schedule Slippage & Fast Validation
Delayed commissioning costs battery gigafactories millions per week. DryAir's turnkey EPC model provides single-source accountability from CFD airflow simulations to rapid cleanroom bake-out and dew point validation.
Next-Generation Trends Reshaping Humidity Control
Staying ahead of industrial transitions from NMC/LFP chemistries to all-solid-state lithium metal architectures.
Solid-State Cell -70°C Dew Points
Sulfide-based solid electrolytes react violently with minimal trace moisture to release toxic hydrogen sulfide (H2S) gas. DryAir's dual-rotor cascade desiccant loops maintain ultra-low dew points below -70°C continuously, meeting pilot and gigawatt-scale requirements.
Zeolite-Silica Nanocomposite Rotors
Advanced synthesized molecular sieve coatings increase moisture adsorption capacity at low entering relative humidities (<10% RH) while lowering necessary reactivation temperatures from 140°C down to 105°C, enabling utilization of low-grade industrial waste steam.
AI Psychrometric Dynamic Tuning
Intelligent control algorithms integrate external weather forecasting, variable production latent heat loading, and real-time electricity tariff curves to dynamically throttle reactivation heater banks and blower RPM without dew point fluctuation.
Critical Mission Environments Engineered by DryAir
Proven across the world's most demanding cleanrooms, solvent capture installations, and defense facilities.
Lithium-Ion Battery Assembly
Electrode winding, pouch cell assembly, and electrolyte injection require stable microclimates of -40°C to -60°C dew point to safeguard chemical longevity and electrochemical cell capacity.
Pharmaceutical & GMP Processing
Hygroscopic active pharmaceutical ingredients (APIs), effervescent powder blending, and gelatin softgel drying require strict 10% to 25% relative humidity control under GMP Class A/B cleanroom airflow standards.
Defense & Aerospace Storage
Engineered to GJB military compliance, DryAir systems prevent micro-galvanic corrosion on missile guidance avionics, radar electronics, ammunition propellants, and naval vessel compartments.
Petrochemical VOC & NMP Recovery
Closed-loop deep condensation systems capture dangerous volatile organic compounds and recover high-purity N-Methyl-2-pyrrolidone solvent from high-volume electrode coater exhaust streams.
Semiconductor & Optoelectronics
Eliminating surface wafer oxidation during photolithography, wafer probing, and optical coating deposition through ultra-stable dew-point air handlers with HEPA filtration.
Food Preservation & Cold Chain
Desiccant drying eliminates ice buildup in spiral freezers, ensures crispness retention in confectionary sugar coatings, and accelerates safe low-temperature cold-room dehydration.
Psychrometric Target & System Selection Matrix
Match your process requirements with certified DryAir equipment configurations.
| Application Sector | Process Zone / Risk Factor | Target Moisture / DP | Recommended System Configuration | Key Operational Benefit |
|---|---|---|---|---|
| Lithium Battery Cell | Winding, Electrolyte Injection | -40°C to -60°C DP | DHU Two-Stage Rotor Cascade + Chillers | Zero HF formation, prevents fire hazard |
| Next-Gen Solid State | Sulfide Electrolyte Processing | Down to -70°C DP | Dual Molecular Sieve Zeolite Rotor Loop | Prevents toxic H2S release, ultra-dry air |
| Cathode Coating Line | Coater Oven Exhaust Recovery | ≥99% Recovery | ZJRH Closed-Loop NMP Recovery Station | Cuts raw solvent purchasing cost by 90%+ |
| Pharmaceutical GMP | Effervescent Blending, Softgels | 10% - 25% RH | Sanitary DHU Series + HEPA Filtration | Eliminates powder caking, meets FDA GMP |
| Defense & Aerospace | Avionics & Ordnance Long-Term | ≤35% - 40% RH | GJB-Compliant Environmental DHU Enclosure | Halts oxidation without chemical preservatives |
| Industrial Warehouses | Raw Material Storage, Packaging | 45% - 55% RH | Heavy-Duty Industrial Refrigerative Units | Lowest CAPEX and energy OPEX per liter |
Frequently Asked Questions for Global Procurement
Direct engineering answers to clarify selection, lifecycle economics, and international integration.
What is the lowest verifiable dew point Hangzhou DryAir systems achieve under continuous load?
Hangzhou DryAir rotary desiccant dehumidifiers reliably achieve and maintain supply air dew points down to -70°C (moisture content below 0.0033 g/kg of dry air). This is accomplished using multi-stage zeolite and high-activity silica gel composite rotors in cascade configurations, protected by high-integrity perimeter air seals.
How does DryAir deliver turnkey battery dry room projects for overseas installations?
DryAir acts as a single-source EPC partner. Our scope covers initial engineering consultations, psychrometric load sizing, 3D BIM coordination, manufacturing, export packing, international logistics, on-site mechanical erection, PLC control integration, cleanroom air tightness validation, and SAT commissioning. We have successfully completed large-scale turnkey dry room projects across Europe, North America, and Asia for global tier-1 leaders including Tesla, Northvolt, CATL, and TTI.
Which global safety and pressure vessel certifications do your export systems carry?
Our units can be engineered and certified to meet the European CE Machinery Directive (2006/42/EC) and Low Voltage Directive, North American UL 1995 / CSA C22.2 No. 236 for electrical equipment, ASME Section VIII Boiler and Pressure Vessel codes, and EAC certification for the Eurasian Economic Union. The company operates under ISO 9001 and the Chinese GJB national military standard quality management systems.
How does DryAir's NMP recovery system achieve ≥99% solvent recovery efficiency?
Our ZJRH series utilizes a closed-loop multi-stage condensation process. Exhaust air from the electrode coating oven is cooled through sensible heat exchangers followed by deep chilled-water coils, condensing gaseous N-Methyl-2-pyrrolidone out of the airstream. Residual trace solvent is polished through a secondary adsorption wheel or VOC abatement system, yielding a combined liquid recovery rate exceeding 99% with clean, compliant atmospheric discharge.
What after-sales service and spare parts availability exist for international buyers?
We offer an optional comprehensive 2-Year International Service Agreement. This includes on-site preventative maintenance by DryAir field technicians, 24/7 remote IoT telemetry monitoring, dedicated local spare part warehousing (seals, belts, motor drives, heating elements), and rapid dispatch guarantees for commissioning and maintenance staff worldwide.
Select Your Desiccant Dehumidifier System Solution
Browse our complete lineup of high-precision humidity control, solvent recovery, and cleanroom air systems.
-50°C to -70°C DP
Industrial Desiccant Wheel Unit
Engineered for continuous low dew point control with regenerative heat recovery options for optimized OPEX.
View Specifications →
Complete EPC
Turnkey Clean Dry Room
Airtight cleanroom envelopes, laminar ducting networks, and integrated air-handling dehumidification systems.
Explore Dry Rooms →
Solvent Capture
ZJRH NMP Solvent Recovery
Captures volatile NMP solvent vapors from electrode dryers with efficiency ratings certified above 99%.
System Details →
RTO Exhaust
JEN Series VOC Abatement
Integrates deep cold condensation with thermal oxidation destruction for ultra-clean exhaust compliance.
Inspect Abatement →
Refrigerative
Refrigerative Dehumidifier
High-capacity condensing units ideal for warehouse storage, packaging bays, and stage-one fresh air drying.
View Pre-Coolers →
GMP Compliant
Pharma Desiccant AHU
Double-skin insulated stainless construction designed specifically for cleanroom pharmaceutical environments.
Modular Units →
Turnkey Facility
Modular Dry Room Enclosure
High-seal sandwich panel construction with airlock chambers, emergency purge loops, and pressure zoning.
Engineering Specs →
Petrochemical
Oil Gas Recovery Unit
Specialized vapor condensation recovery capturing hydrocarbon vapors during loading and tank storage.
Learn More →