-70°C Dew Point
Rotary Desiccant Dehumidifier
DHU-Series honeycomb silica-gel/molecular sieve rotors engineered for critical process drying.
Direct OEM Catalog
Featured Industrial & Compact Dehumidification Fleet
High-precision micro-environment moisture removal systems engineered to maintain relative humidity and dew points down to -70°C for global industrial lines.
Turnkey EPC
Turn-key Dry Room System
Full-envelope enclosure, tight airlock containment, and psychrometric control for cell manufacturing.
≥99% Efficiency
NMP Solvent Recovery System
ZJRH condensation and thermal treatment capturing electrode exhaust for closed-loop solvent purity.
Cryogenic + RTO
VOC Abatement System
Deep condensation paired with regenerative oxidizers to treat industrial off-gas and hydrocarbons.
Commercial Grade
Refrigerative Dehumidifier
Energy-efficient direct expansion condensers for warehouse ambient moisture control and pre-cooling.
Mini Dry Unit
Compact Micro-Desiccant Unit
Localized drying skid designed for cleanroom pass boxes, glove boxes, and bench-top automation cells.
Ex-Proof / Military
GJB Defense Climate Skid
Heavy-duty explosion-proof desiccant system meeting stringent military storage and testing criteria.
Zero Emissions
Oil Vapor Condensation Unit
High-pressure condensation and vapor abatement for continuous fuel storage and logistics transfer.
Industry Analysis
Global Macro Shifts in Precision Dehumidification
Modern cleanrooms and mini-environments are undergoing a paradigm shift: decentralized micro-zone control is outperforming monolithic facility-wide air conditioning in both energy economics and dew point consistency.
Micro-Zone Decoupling
High-throughput industries such as battery cell electrolyte filling and optical lithography are moving from large, energy-hungry -40°C central AHUs to localized mini desiccant modules. Placing compact rotors on localized tooling cuts operational thermal load by up to 42%.
Stricter Global Dew Point Mandates
With the commercial rollout of solid-state lithium-metal batteries and sulfur-based solid electrolytes, tolerance thresholds have tightened from -40°C to -65°C / -70°C dew point (DP) to prevent dangerous moisture reactions and toxic hydrogen sulfide outgassing.
Energy Optimization & Heat Recovery
Desiccant wheel reactivation requires continuous sensible heat (120°C–140°C). Top-tier Chinese original equipment manufacturers now integrate closed-loop heat exchangers, heat pump regenerative stages, and secondary air recovery that slash electric utility draws by a third.
Supply Chain Excellence
China Factory 4.0: Supply Chain Resilience & Speed
Hangzhou DryAir's intelligent manufacturing infrastructure provides international procurement teams with structural cost efficiency, military-grade tolerance standards, and short delivery cycles.
-70°C
Minimum Dew Point Verified
≥99%
NMP Solvent Capture Efficiency
30%+
China Domestic Market Share
200+
Industrial Units Built / Mo
Full-Chain Quality Auditing
Certified under dual ISO 9001 and the GJB national defense equipment framework. Every mini and industrial unit undergoes thermodynamic run-in tests inside a calibrated enthalpy testing chamber prior to sea freight dispatch.
Global Tier-1 References
Validated by demanding gigafactory customers including Tesla, Northvolt, CATL, ATL, BYD, SVOLT, and TTI. Proven low air leakage rates (<0.5%) and high volumetric mechanical integrity survive continuous industrial runtimes.
Export Compliant Engineering
Engineered for seamless drop-in placement worldwide with full CE, UL, CSA, ASME, and EAC certifications. Electrical architectures are built on Siemens or Schneider PLCs with native 400V/480V 50Hz/60Hz multi-grid compatibility.
Engineering Evaluation
Engineering Matrix: Process Requirements vs System Architecture
Selecting the correct target dew point is the single most critical factor in capital allocation and plant life-cycle operating expense.
| Target Industrial Application | Required Dew Point / RH | System Architecture | Recommended Machine Solution |
|---|---|---|---|
| Lithium Battery Cell Assembly & Electrolyte Injection | -40°C to -60°C DP | Dual-wheel rotary desiccant + deep pre-cooling | Turn-key Dry Room System |
| Solid-State & Next-Gen Lithium Metal Pilot Lines | -60°C to -70°C DP | Cascade molecular sieve desiccant module | Rotary Desiccant Dehumidifier |
| Electrode Slurry Coating & High-Speed Dryer Exhaust | ≥99% Solvent Retention | Multistage chillers + VOC recovery column | NMP Recovery System |
| Pharmaceutical Tablet Compression & Capsule Blister Packaging | 10% to 30% RH | GMP-compliant hygienic silica gel rotor | Cleanroom Desiccant Unit |
| Aerospace Electronics & Military Storage Enclosures | ≤40% RH | GJB-standard ruggedized desiccant air dryer | GJB Defense Climate Skid |
| General Industrial Logistics & Material Silo Buffering | 45% to 60% RH | High-efficiency direct expansion DX condenser | Refrigerative Dehumidifier |
Implementation Model
Turnkey EPC Workflow: From Consultation to Validation
Eliminating contractor fragmentation with one accountable engineering source from psychrometric modeling to final FAT/SAT performance sign-off.
01 / Consulting & Load Audit
Auditing fresh air infiltration rates, latent human loads, machine process exhaust, and room volume to establish real-world moisture balance charts.
02 / CAD & Psychrometric Design
Computational Fluid Dynamics (CFD) airflow simulations, rotor velocity calculations, and heat recovery circuits optimized for minimal kWh/kg moisture removal.
03 / In-House Manufacturing
High-precision CNC sheet metal fabrication, rockwool thermal break panel integration, and electrical cabinet wiring with rigorous factory acceptance testing.
04 / Erection & Commissioning
DryAir dispatched dispatchers lead mechanical duct jointing, airtight wall envelope assembly, sensor calibration, and deep air purging.
05 / 2-Year Warranty & Service
24/7 telemetry diagnostics, spare seal and belt stocks, and optional two-year on-site SLA warranty agreements for international installations.
Buyer's Intelligence
Frequently Asked Sourcing & Engineering Questions
Clear, audited answers to questions asked by procurement directors, HVAC consulting engineers, and plant operations leads.
What is the lowest dew point a DryAir desiccant dehumidifier can achieve?
DryAir rotary desiccant systems reliably deliver process air down to -70°C dew point. This capability is required for solid-state electrolyte processing, lithium pouch cell vacuum sealing, and high-purity chemical vapor synthesis.
Do you supply complete turnkey dry rooms for battery factories outside China?
Yes. Hangzhou DryAir provides full EPC delivery including structural airtight envelope construction, double-rotor AHU modules, chilling interfaces, HEPA filtration, ducting, and instrumentation. We have completed projects for overseas tier-one clients including Tesla, Northvolt, and TTI.
Which international electrical and mechanical certifications are supported?
Depending on destination country requirements, our machinery is supplied with CE (LVD/MD/EMC), UL/cUL, CSA, ASME boiler/vessel codes, and EAC conformity. Our plants operate under certified ISO 9001 and Chinese GJB national military manufacturing quality systems.
What recovery rate can a DryAir NMP recovery system reach?
DryAir ZJRH NMP solvent recovery systems achieve a guaranteed capture rate of ≥99% on battery cathode drying ovens. Recovered NMP meets industrial purity standards for redistillation or immediate reuse, significantly reducing virgin solvent purchases.
What after-sales service and engineering warranty options exist for global buyers?
Overseas buyers can choose an optional two-year complete service agreement. This includes cloud-based remote telemetry diagnostics, consignment spare parts kits, and rapid deployment of our commissioning engineering corps for FAT/SAT sign-offs.
Global Product Portfolio
Industrial Environmental & Air Purification Systems
Select from our field-tested line of desiccant wheels, VOC scrubbers, turnkey enclosures, and industrial condensation chillers.
Extreme DP
Industrial Desiccant Wheel
Rotary adsorption rotors maintaining low moisture vapor pressures in extreme conditions.
Complete Facility
Complete Dry Room Cleanroom
Modular partition walls, pressure balancing, and low dew-point supply air delivery.
Solvent Capture
Industrial NMP Recycling Unit
Closed-loop solvent recovery for roll-to-roll electrode coating lines.
Emission Safe
RTO VOC Thermal Oxidizer
Thermal destruction and carbon adsorption arrays handling industrial VOC effluent.
High Capacity
DX Refrigerative Chiller
Condensation-based moisture separation for warehouses, storage spaces, and workshops.
Mini Desiccant
OEM Mini Desiccant Skid
Modular low dew-point skid for direct integration into isolated equipment cells.
Cleanroom Ready
Pharma GMP Rotary Dryer
Stainless steel sanitary air handlers meeting FDA/EMA hygiene compliance.
Fuel Terminals
Tank Vapor Condensation Skid
Heavy hydrocarbon recovery skids preventing vapor release at loading terminals.