DP -70°C
Desiccant Dehumidifier
DHU rotary low-dew-point systems delivering persistent moisture removal below conventional refrigeration boundaries.
View SpecificationsFactory Wholesale Portfolio
Featured Industrial Air Purification & Dehumidification Systems
Engineered for mission-critical environmental control where moisture or airborne contamination causes complete product failure. Direct export procurement with full custom engineering support.
DP -70°C
Full EPC
Turn-key Dry Room System
Modular clean dry rooms featuring airtight structural envelopes, air distribution ducts, and centralized low-dew-point controls.
Explore Dry Rooms
Recovery ≥99%
NMP Recovery System
High-efficiency solvent condensation and closed-cycle exhaust cleaning designed for battery electrode continuous coating lines.
Learn More
Deep Cooling + RTO
VOC Abatement System
Industrial volatile organic compound neutralization with cryogenic condensing stages and regenerative thermal oxidation.
Learn More
Energy Saver
Refrigerative Dehumidifier
High-efficiency mechanical condensation moisture reduction systems suited for bulk pre-cooling and warehouse air treatment.
Learn More
Ultra-Dry Air
Ultra-Low DP Purifier
Dual-rotor desiccant air handlers with integrated HEPA particulate filtering for pharmaceutical GMP packaging environments.
View Details
GJB Military Grade
Aerospace Grade Dehumidifier
Corrosion-inhibiting high capacity air purification systems configured for avionics storage and sensitive military munitions silos.
View Specifications
High Volume CFM
Gigafactory HVAC Purifier
Multi-stage enthalpy recovery and rotary desiccant processing engineered to support modular gigawatt battery production expansions.
Explore Dry RoomsMacro Industry Analysis
Global Macro Trends & Industrial Dehumidification Dynamics
The transition to solid-state batteries, sterile biologics manufacturing, and precision semiconductor fabrication is forcing a paradigm shift from simple comfort cooling to ultra-tight moisture abatement.
Lithium-Metal & Solid-State Evolution
Traditional NMC cell assembly functions at -40°C to -50°C dew point. Next-generation lithium-metal anode and sulfide-based solid electrolytes degrade instantly upon contacting even single-digit parts per million of moisture, driving requirements down to an unprecedented -70°C dew point.
Tightening Chemical & VOC Regulations
Environmental bodies worldwide (such as the EU REACH framework and EPA Clean Air standards) have introduced strict caps on VOC discharge and solvent emissions. N-Methyl-2-pyrrolidone (NMP) recovery systems must perform beyond 99% collection efficiency to prevent penalties and conserve chemical assets.
Decarbonization & Energy Consumption
Thermal regeneration of rotary desiccant wheels accounts for up to 35-45% of total dry room operational expenditures. Global tier-one factories now prioritize systems incorporating internal sensible heat exchangers, bypass purge cooling loops, and waste heat recovery integration.
-70°C
Minimum Dew Point Spec
≥99%
NMP Solvent Recovery
30%+
China Market Footprint
200+
Monthly Unit Throughput
74
Engineers & Technical Staff
Authority & Technical Provenance
About Hangzhou DryAir Treatment Co., Ltd.
Founded in 2010 in Hangzhou's Qingshan Industrial Park, Hangzhou DryAir has emerged as an authoritative industrial force in heavy-duty desiccant dehumidification, turnkey dry rooms, and VOC solvent recovery systems. Holding over 30% of China's desiccant dehumidification market, DryAir delivers critical environmental infrastructure capable of maintaining supply air at a consistent -70°C dew point.
Our systems safeguard production lines for international innovators including Tesla, Northvolt, CATL, ATL, BYD, EVE Energy, Farasis, Envision, SVOLT, and TTI. From pre-engineering psychrometric modeling and factory build to on-site assembly and validation, we operate under ISO 9001 and strict GJB national military standard quality controls.
TESLANORTHVOLTCATLBYDATLEVE ENERGYFARASISENVISIONSVOLTTTI
Application Engineering
Localized Multi-Scenario Industrial Deployments
Air purifiers and desiccant dehumidifiers do not operate under uniform operating conditions. Our units are tailored to specific industrial, biological, and chemical failure risks.
Lithium Battery Gigafactories
Electrode coating, slitting, cell winding, and electrolyte filling zones require strict isolation. When water vapor meets LiPF6 electrolyte, toxic and corrosive hydrofluoric acid (HF) is formed, creating cell degradation and safety hazards. We engineer multi-stage dry rooms holding -40°C to -60°C continuous dew point.
Pharmaceutical & Medical Bio-Cleanrooms
Hygroscopic active pharmaceutical ingredients (APIs), effervescent powder blending, and soft gelatin encapsulation suffer structural clumping and microbial proliferation under elevated relative humidity. DryAir combines HEPA microfiltration with dry-wheel sorption to secure 10%–25% RH in cleanroom classes 100 to 100,000.
Military Equipment & Aerospace Defense
Built under China's GJB national military standard, our mobile and fixed systems protect aerospace avionics, guided munitions, radar assemblies, and sensitive missile propellants from moisture-induced corrosion, premature oxidation, and chemical propellant instability.
Petrochemical & Bulk Oil Gas Recovery
Condensation recovery and regenerative VOC capture systems process volatile hydrocarbon fumes emitted during marine tanker loading, fuel depot pumping, and chemical refinement, converting hazardous vapor releases into usable liquid fuels.
Precision Electronics & Semiconductor Wafers
Optical lithography lenses, photoresist baking zones, and flat-panel display array glass handling demand moisture-free ambient air to eliminate internal condensation and ionic contamination during nanofabrication cycles.
Cold Chain Storage & Seed Gene Banks
Deep-freeze logistics hubs and cryo-preservation vaults implement desiccant air treatment to prevent surface icing across evaporator coils and avoid door seal freeze-locking without interrupting cold chain processes.
Supply Chain Superiority
China Supply Chain Resilience & Manufacturing Velocity
How Hangzhou DryAir’s vertically integrated industrial cluster provides global engineering buyers with rapid lead times, custom flexibility, and total cost of ownership advantages.
Full Vertical In-House Control
We execute sheet metal laser profiling, CNC punching, structural frame welding, coil assembly, electrical wiring, and PLC logic integration inside our Lin'an, Hangzhou plant without reliance on third-party fabricators.
Rapid Delivery Lead Times
Standard desiccant packages ship in 4–6 weeks; customized multi-rotor dry room systems ship in 8–12 weeks. Our streamlined regional supplier network enables delivery times up to 50% faster than typical Western manufacturers.
Economies of Scale
Producing over 200 heavy-duty units per month for major players like CATL and BYD gives us raw material buying power that translates directly into lower capital costs for our international export partners.
Full Factory Pre-Testing
Every industrial unit undergoes dynamic testing inside our certified environmental testing chamber. We simulate target ambient psychrometric conditions to calibrate low dew-point performance before shipping.
R&D Roadmap
Technology Roadmap & Engineering Outlook (2025–2030)
Addressing the dual operational challenges of micro-environmental purity and thermal energy intensity through systematic engineering innovations.
Phase I: Active Deployment
AI Predictive Dew-Point Throttling
Integration of multi-channel humidity sensors, airflow meters, and weather predictive algorithms into Siemens/Schneider PLC controls. The system auto-modulates regeneration heaters in real time to prevent over-drying and cut power usage by up to 22%.
Phase II: Next-Gen Sorption
Metal-Organic Frameworks (MOF)
Developing advanced zeolite rotors coated with functionalized MOFs. These materials regenerate at lower desorption temperatures (60°C–80°C vs standard 130°C–140°C), making it possible to run regeneration entirely on industrial low-grade waste heat.
Phase III: Modular Dry Rooms
Pre-Engineered Flat-Pack Enclosures
Standardized, pre-fabricated dry room panels featuring integrated interlocking cams, pre-installed duct manifolds, and automated pressure seal testing. Reduces on-site installation and testing timelines at overseas destinations by 40%.
Phase IV: Zero-Emission Recovery
Closed-Loop Multi-Condensation Systems
Next-generation closed-circuit NMP systems utilizing dual-stage cascade refrigeration and high-purity distillation modules to achieve 99.8% recovery efficiency with minimal exhaust emissions.
Buyer's Specification Matrix
Engineering Selection Guide by Target Metric
Select the right system configuration for your operational parameters. Contact our engineering team for full psychrometric air-state calculations and equipment sizing.
| Application & Process Type | Moisture / Gas Target | System Architecture | Target Airflow Range | Primary Energy Source |
|---|---|---|---|---|
| Lithium-Ion Cell Assembly & Electrolyte Fill | -40°C to -60°C DP | Dual-Rotor Desiccant + Water Chilling Pre-Cool | 2,000 – 150,000 CMH | Electric / Steam Regeneration |
| Solid-State Battery & Lithium-Metal Research | Down to -70°C DP | Triple-Stage High-Purity Sorption Wheel AHU | 1,000 – 40,000 CMH | High-Temperature Electric Heater |
| Electrode Drying Line Solvent Recovery | ≥99% NMP Recovery | Cryogenic Condenser + Zeolite Concentrator Rotor | 5,000 – 120,000 CMH | Chilled Water Loop + Recycled Exhaust Heat |
| Hygroscopic Pharma Powders & Capsule Lines | 10% – 30% RH (Class D/C) | Rotary Desiccant Dehumidifier + HEPA Filter Banks | 1,500 – 60,000 CMH | Low-Pressure Steam / Heat Pump |
| Munitions, Missiles & Military Depot Storage | ≤40% RH (Ambient) | Heavy-Duty Skid Desiccant Air Purifier (GJB Spec) | 500 – 30,000 CMH | Electric PTC Regeneration |
| Bulk Warehousing & Industrial Pre-Cooling | 45% – 60% RH | Direct Expansion (DX) Refrigerative Dehumidifier | 3,000 – 80,000 CMH | Scroll / Screw Compressor Electricity |
Compliance & Field Execution
Global Compliance & International Support
Delivering turn-key industrial projects worldwide requires end-to-end alignment with regional electrical codes, structural norms, and safety directives.
International Safety Certifications
DryAir platforms are engineered to meet global standards. We provide certified documentation for CE (Machinery & Low Voltage Directives), UL 1995/CSA for North America, ASME pressure vessel stamps, and EAC certification for Eurasian projects.
Turnkey On-Site Field Support
Our senior installation engineers deploy on-site for overseas dry room assemblies. From laser panel alignment and leak sealing to balancing airflows and verifying dew points, we oversee the full commissioning cycle until handover.
2-Year Overseas Service Plans
In addition to standard factory warranties, international clients can select extended 2-year service packages covering annual on-site inspections, IoT remote telemetry diagnostics, rapid spare parts fulfillment, and rotor re-certification.
Procurement Knowledge Base
Frequently Asked Questions
Technical, logistical, and operational answers for procurement directors, engineering consultants, and cleanroom contractors.
What is the minimum controllable dew point Hangzhou DryAir units can achieve?
Hangzhou DryAir rotary desiccant dehumidifiers can maintain supply air down to a verified minimum of -70°C dew point. This ultra-dry output is engineered for next-generation solid-state battery R&D, lithium-metal battery assembly, and specialized moisture-sensitive chemical synthesis.
Can DryAir supply complete turnkey dry room enclosures outside of China?
Yes. We provide complete turnkey dry room services covering pre-project consulting, psychrometric design, enclosure and panel manufacturing, HVAC air ducting, on-site mechanical erection, commissioning, and final air state validation. We have delivered operational projects for global customers including Tesla, Northvolt, and TTI.
What safety and regional compliance certifications are available for international export?
Depending on model and destination country, DryAir systems can be supplied with CE marking (Machinery Directive, EMC, and LVD), UL/CSA compliance certifications for North America, ASME certification for pressurized vessels, and EAC declarations for Eurasia. Our factory operates under ISO 9001 and GJB national military quality standards.
What solvent recovery efficiency does the DryAir NMP system guarantee?
DryAir ZJRH series NMP recovery systems are engineered to achieve an overall solvent recovery rate of 99% or higher on continuous lithium-ion electrode coating lines. This reduces solvent procurement costs and ensures compliance with international industrial VOC emission caps.
How does DryAir reduce the energy consumption of desiccant wheel regeneration?
Desiccant regeneration consumes significant thermal energy. DryAir designs incorporate internal sensible heat wheels, purge preheating zones, and heat exchangers that reuse hot exhaust air from the reactivation loop. Our controls can also interface with plant-wide steam or thermal waste heat networks, lowering regeneration electricity draw by up to 30%.
What after-sales and warranty coverage is provided for international buyers?
We provide remote diagnostic support, spare parts dispatch, and field dispatch of commissioning engineers. International buyers can also opt for our comprehensive 2-Year Extended Service Agreement, which includes scheduled preventive site audits and dedicated engineering contacts.
Factory Equipment Selection
Complete Environmental & Purifying Product Lineup
Explore our full line of rotary desiccant, VOC abatement, and solvent recovery systems. Custom configurations available upon review of your facility layout.
DHU Core
Industrial Desiccant Unit
High-efficiency desiccant wheel rotor assembly for critical humidity reduction across industrial production lines.
View Specifications
Complete Facility
Battery Dry Room Project
Custom turnkey clean dry rooms offering high airtightness, walk-in access airlocks, and precise environmental monitoring.
Explore Dry Rooms
Solvent Recovery
NMP Condensation System
Closed-loop solvent recovery system delivering 99%+ capture rates for battery electrode drying ovens.
Learn More
Clean Emission
VOC Incineration Unit
Regenerative thermal oxidation and cryogenic chilling combinations to neutralize process off-gases.
Learn More
Industrial DX
DX Refrigerative Unit
Mechanical refrigeration air dryers providing pre-cooling stages before downstream ultra-dry desiccant treatment.
Learn More
Vapor Recovery
Oil Gas Recovery Unit
Hydrocarbon condensing equipment capturing fuel vapor emissions during bulk tanker loading and fuel transshipment.
Learn More
Cleanroom Spec
Pharma Low RH Purifier
Stainless steel hygienic air handling units engineered for pharmaceutical formulation, blending, and blister packaging.
View Specifications
GJB Military Standard
Defense Air Purifier Unit
Rugged environmental control packages engineered for military equipment preservation and sensitive avionics protection.
View SpecificationsStart Your Engineering Specification
Request Technical Whitepapers, Psychrometric Models & Catalogs
Evaluating low-dew-point equipment for a gigafactory, cleanroom facility, or chemical plant? Our technical teams provide psychrometric load calculations, piping schematics, and firm wholesale quotations within one business day.