Nitrogen Anoxic Treatment System for Museum Collections

Configuration Overview

An ambient-pressure controlled-atmosphere configuration using an airtight enclosure, clean nitrogen supply, oxygen control and humidity monitoring. Cabinet, room, room-in-room and nitrogen-assisted freezing-room forms support different batch sizes and treatment-space requirements.

Working Principle

The system uses clean nitrogen as the low-oxygen treatment gas. Nitrogen is injected into an airtight treatment space to reduce the oxygen concentration and deprive pests of the oxygen required for survival.

The low-oxygen environment causes pests to die from oxygen deprivation, suffocation, and dehydration, providing pest control for collections.

This treatment method does not use conventional chemical fumigants, avoiding chemical residues and reducing additional effects on collection materials.

Key Functions

Low-Oxygen Treatment

Humidity Control

Pest Treatment

Remote Monitoring

Multi-Chamber Control

Oxygen Warning & Re-Oxygenation

Treatment Forms

Airtight Treatment Cabinet
Anoxic Treatment Room
Room-in-Room System
Low-Oxygen Nitrogen Freezing Room

Ambient-Pressure Treatment Performance

Item	Parameter
Oxygen Concentration	0.1%–1.0%
Humidity adjustment	Adjustable from 10% RH to 95% RH
Treatment time	Approximately 7–30 days
Treatment method	Ambient-pressure low-oxygen nitrogen treatment
Remote control	Optional
Humidity-conditioning module	Optional
Temperature-control module	Optional
Material	Carbon steel, stainless steel, aerospace-grade material, transparent glass, thermal-insulation material, etc.

SADY Series Models

Model	Volume（m³）	Overall dimensions（mm）	Internal dimensions（mm）	Oxygen concentration	Temperature / humidity	Power supply	Power（kW）
SADY-3	3	1550×1450×2000	1350×1250×1800	0.1%–1.0%	10%–95% adjustable	AC 220 V / 50 Hz	5.5
SADY-5	5	2350×1500×2000	2150×1300×1800	0.1%–1.0%	10%–95% adjustable	AC 220 V / 50 Hz	6.5
SADY-8	8	3200×1700×2000	3000×1500×1800	0.1%–1.0%	10%–95% adjustable	AC 220 V / 50 Hz	7.5
SADY-10	10	4200×1700×2000	4000×1500×1800	0.1%–1.0%	10%–95% adjustable	AC 220 V / 50 Hz	8.5
SADY-12	12	4700×1700×2000	4500×1500×1800	0.1%–1.0%	10%–95% adjustable	AC 220 V / 50 Hz	9.5
SADY-15	15	5760×1700×2000	5560×1500×1800	0.1%–1.0%	10%–95% adjustable	AC 220 V / 50 Hz	10
SADY-18	18	3150×3000×2400	2950×2800×2200	0.1%–1.0%	10%–95% adjustable	AC 220 V / 50 Hz	12
SADY-20	20	3300×3050×2500	3100×2850×2300	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	13
SADY-30	30	3850×2800×2500	3650×2600×2300	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	15
SADY-40	40	4400×4200×2600	4200×4000×2400	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	16
SADY-50	50	4800×4800×2600	4600×4600×2400	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	19
SADY-60	60	5200×5200×2600	5000×5000×2400	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	22
SADY-70	70	5800×5200×2700	5600×5000×2500	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	25
SADY-80	80	6050×5700×2700	5850×5500×2500	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	28
SADY-90	90	6200×6200×2700	6000×6000×2500	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	35
SADY-100	100	6900×6200×2700	6700×6000×2500	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	38
SADY-150	150	8200×7700×2700	8000×7500×2500	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	45
SADY-200	200	10200×8200×2700	10000×8000×2500	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	53
SADY-300	300	11800×10200×2800	11600×10000×2600	0.1%–1.0%	Temperatureambient temperature	AC 380 V / 50 Hz	60

Large Anoxic Room System

The low-oxygen airtight display and treatment room can be constructed as an airtight space of 1–3,000 m³ according to collection-treatment and storage requirements.

The system uses a high-purity nitrogen-generation and display-control unit to produce nitrogen at 99.99% purity. Combined humidity and oxygen-concentration adjustment creates a low-oxygen, constant-humidity, stable, and clean treatment environment for cultural-heritage objects.

The treatment space can use an integrated storage cabinet or a one-to-two storage-cabinet arrangement.

Room-in-Room Anoxic Storage

Item	Parameter
Capacity range	50–1,000 m³; customizable
Air-exchange rate	0.05d⁻¹
Oxygen-concentration control range	0.1%～21%
Continuous oxygen-concentration monitoring	Supported
Stable low-oxygen level	0.2%
Humidity Control Range	10%～95%RH
Filtration rating	Up to 0.01 μm
Treatment-enclosure form	Bag, cabinet, tent, or room

Low-Oxygen Nitrogen Freezing Treatment

Treatment Time

Model	Volume (m³)	Overall Dimensions (mm)	Internal Dimensions (mm)	Oxygen Concentration	Relative Humidity	Freezing Temperature	Power Supply	Power (kW)
SADY-3	3	1650×1550×2100	1350×1250×1800	0.01%–1.0%	Adjustable from 45% to 65%	Adjustable from -40°C to 28°C	AC 220 V / 50 Hz	5.5
SADY-5	5	2450×1600×2100	2150×1300×1800	0.01%–1.0%	Adjustable from 45% to 65%	Adjustable from -40°C to 28°C	AC 220 V / 50 Hz	6.5
SADY-8	8	3300×1800×2100	3000×1500×1800	0.01%–1.0%	Adjustable from 45% to 65%	Adjustable from -40°C to 28°C	AC 220 V / 50 Hz	7.5
SADY-10	10	4300×1800×2100	4000×1500×1800	0.01%–1.0%	Adjustable from 45% to 65%	Adjustable from -40°C to 28°C	AC 220 V / 50 Hz	8.5
SADY-12	12	4800×1800×2100	4500×1500×1800	0.01%–1.0%	Adjustable from 45% to 65%	Adjustable from -40°C to 28°C	AC 220 V / 50 Hz	9.5
SADY-15	15	5860×1800×2100	5560×1500×1800	0.01%–1.0%	Adjustable from 45% to 65%	Adjustable from -40°C to 28°C	AC 220 V / 50 Hz	10
SADY-18	18	3250×3100×2500	2950×2800×2200	0.01%–1.0%	Adjustable from 45% to 65%	Adjustable from -40°C to 28°C	AC 220 V / 50 Hz	12
SADY-20	20	3300×3150×2500	3100×2850×2300	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	13
SADY-30	30	3950×2900×2600	3650×2600×2300	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	15
SADY-40	40	4400×4200×2700	4200×4000×2400	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	16
SADY-50	50	4900×4900×2700	4600×4600×2400	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	19
SADY-60	60	5300×5300×2700	5000×5000×2400	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	22
SADY-70	70	5900×5300×2800	5600×5000×2500	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	25
SADY-80	80	6150×5800×2800	5850×5500×2500	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	28
SADY-90	90	6300×6300×2800	6000×6000×2500	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	35
SADY-100	100	7000×6300×2800	6700×6000×2500	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	38
SADY-150	150	8300×7800×2800	8000×7500×2500	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	45
SADY-200	200	10300×8300×2800	10000×8000×2500	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	53
SADY-300	300	11900×10300×2900	11600×10000×2600	0.01%–1.0%	Adjustable from 45% to 65%	-60°C to -80°C, selectable	AC 380 V / 50 Hz	60

Suitable Collections

Suitable for:

Cultural-heritage objects;
Books;
Archives;
Paper collections;
Organic-material collections;
Metal collections;
Inorganic-material collections;
Collection materials requiring low-oxygen pest treatment;
Professional collections requiring stable low-oxygen storage.

Customization

Customization according to project requirements includes:

Treatment-space volume;
Airtight cabinet, treatment room, room-within-a-room, or freezing-treatment room form;
Carbon steel, stainless steel, aerospace-grade material, transparent glass, or thermal-insulation material;
Oxygen-concentration control;
Humidity adjustment;
Low-temperature or freezing module;
Constant-temperature and constant-humidity module;
Remote control;
Coordinated operation of multiple treatment spaces;
Other site-specific dimensions.

Configuration Overview

A combined vacuum-and-nitrogen configuration using evacuation, high-purity nitrogen injection, low-oxygen displacement, automatic pressure holding and humidity adjustment. PLC control monitors vacuum, oxygen concentration, temperature, humidity and treatment duration.

Working Principle

The system reduces pressure and oxygen concentration inside the treatment chamber by evacuation, then injects high-purity nitrogen from the nitrogen generator to establish a low-oxygen environment.

During treatment, pressure reduction, oxygen deprivation, and moisture evaporation provide pest-control, sterilization, and disinfection effects.

No chemicals are added during the process, and no harmful gases or pollutants from chemical fumigation are discharged.

Key Functions

Vacuum Treatment

Nitrogen Anoxia

Pest Treatment

Sterilization & Disinfection

Humidity Control

Detection & Display

Optional Freezing Treatment

Optional Remote Control

System Composition

The system comprises:

Vacuum treatment chamber;
Nitrogen generator;
Built-in air compressor;
Freeze dryer;
Air receiver;
Vacuum pump;
Automatic humidification system;
Temperature and humidity sensors;
Vacuum sensor;
Oxygen-concentration analyzer;
PLC control system;
Touchscreen display;
Mobile trolley.

Technical Specifications

Item	Parameter
Volume Range	0.5～100m³
Operating Voltage	AC 380 V, three-phase five-wire
Operating Pressure	0.2 kg/cm²
Operating Vacuum Pressure	100 Pa
Operating Modes	Automatic mode / manual mode
Nitrogen Introduction Method	Program-controlled automatic nitrogen injection and displacement
Nitrogen Source	Nitrogen Generator
Nitrogen Purity	99.99%
Nitrogen generation rate	＞5m³/h
Power Consumption	＜8kW
Vacuum-pump pumping speed	4～63L/s
Vacuum-pump noise	＜50 dB
Oxygen Concentration	≤1‰
Automatic humidification range	35%～60%
Humidity setpoint range	0%～100%
Treatment time	15–72 hours
Operating ambient temperature	28～35℃
Equipment Footprint	8～30m²
Door operation	Manual mechanical transmission
Door Seal	O-ring seal for positive and negative pressure

Automatic Control

The PLC control system automatically performs:

Door locking;
Evacuation;
Nitrogen generation;
Nitrogen charging;
Nitrogen displacement;
Automatic pressure holding;
Automatic venting;
Temperature and humidity monitoring;
Vacuum monitoring;
Oxygen-concentration monitoring.

In manual mode, door opening, door closing, unlocking, locking, evacuation, nitrogen generation, nitrogen charging, nitrogen displacement, and venting can be operated individually.

Safety System

Nitrogen Generator Safety
Air Tank Safety
Vacuum Chamber Safety
Fault Alarm
Humidity Compensation
Noise

Item	Parameter
Equipment Noise Level	≤65dB
Air-receiver safety pressure	≤0.8MPa

SACD Series Models

No.	Model	Capacity（m³）	Chamber dimensions： × × （mm）	Overall dimensions： × × （mm）	/ Weight（kg）	MaterialWeight（kg）	22×31×4（cm）	（kW）
1	SACD-0.5	0.5	630×500×1600	980×650×1800	400	310	108–115	5.5
2	SACD-0.6	0.6	750×500×1600	1200×650×1800	500	328	128–135	5.5
3	SACD-0.8	0.8	1000×500×1600	1450×650×1800	650	340	176–182	5.5
4	SACD-1	1	900×700×1600	1200×850×1800	680	366	224–232	5.5
5	SACD-1.25	1.25	980×800×1600	1380×950×1800	760	370	288–295	5.5
6	SACD-1.5	1.5	1180×800×1600	1930×950×1800	840	390	312–320	6.5
7	SACD-2	2	1130×980×1800	1900×1160×2000	920	424	495–502	7.5
8	SACD-3	3	1350×1250×1800	2250×1500×2050	1240	528	672–682	8
9	SACD-4	4	1700×1300×1800	2700×1600×2050	1560	654	896–906	8
10	SACD-5	5	2150×1300×1800	3150×1600×2050	1880	780	1120–1132	8.5
11	SACD-8	8	2960×1500×1800	4000×1800×2050	2840	1088	1792–1805	9.5
12	SACD-10	10	3700×1500×1800	4900×1800×2050	3480	1360	2240–2253	12
13	SACD-15	15	5560×1500×1800	7060×1800×2050	5080	2040	3360–3375	13
14	SACD-17	17	5250×1800×1800	6750×2100×2050	5720	2312	3808–3828	15

Material & Structure Options

Options according to project requirements include:

SUS304 stainless steel;
Q235 carbon steel;
Aerospace-grade material;
Sectional fabrication and on-site assembly;
Mobile-trolley loading;
Bookcase-style enclosure structure.

Selection & Installation

Selection should comprehensively consider:

Daily quantity of archives to be treated;
Treatment-room area;
Floor on which the equipment will be installed;
Elevator rated load;
Corridor and treatment-room door widths;
Floor load-bearing capacity;
Vacuum-enclosure material;
Availability of 380 V power;
Equipment transport route.

Suitable Collections

Suitable for:

Archives;
Rare books;
Books;
Cultural-heritage objects;
Paper collections;
Other collection materials requiring combined vacuum and nitrogen low-oxygen treatment.

Configuration Overview

A vacuum-only configuration that creates a low-pressure, oxygen-reduced and moisture-controlled chamber environment without nitrogen injection, chemical agents, heating or positive pressure. It supports pest treatment, microbial control, dust and odor removal, and humidity management.

Working Principle

The equipment rapidly removes oxygen, reduces pressure, and removes moisture from the treatment chamber by evacuation, providing physical treatment in a near-vacuum environment.

No chemicals, nitrogen, or other pest-control auxiliary materials are used during the process.

The vacuum environment affects moisture within pests and their survival conditions, providing pest-control, sterilization, and disinfection effects.

Key Functions

Vacuum Pest Treatment

Sterilization & Mold Control

Oxygen Reduction

Dust Removal

Odor Removal

Humidity Control

Optional Freezing Treatment

Optional Remote Control

Suitable Materials

Suitable for:

Paper archives;
Books;
Silk collections;
Bamboo and wooden collections;
Leather collections;
Other collection materials suitable for vacuum treatment.

Equipment Structure

The equipment uses a cabinet structure with a proprietary pull-out/push-in archive rack that can travel directly to and from the repository.

The cabinet door uses manually operated hinges.

The system comprises:

Vacuum chamber;
Vacuum pump;
Humidification system;
Piping connections;
Electronic components;
PLC control system;
Temperature and humidity sensors;
Vacuum sensor;
Internal and external mobile trolleys.

Technical Specifications

Item	Parameter
Volume Range	0.5～100m³
Model range	SA-0.5～SA-100
Operating Vacuum Pressure	10Pa
Equipment Noise Level	55dB
Operating Modes	Automatic mode / manual mode
Vacuum-pump water-handling capacity	＞100g/h
Vacuum-pump pumping speed	4L/s
Operating Voltage	AC 220 V, single-phase three-wire
Oxygen Concentration	≤2‰
Humidity Control Range	35%～60%
Treatment time	2–8 hours
Operating ambient temperature	28～35℃
Door Seal	O-ring seal for positive and negative pressure
Remote control	Optional

Operation & Control System

The equipment uses PLC programming, automatic monitoring, and automatic control, with both automatic and manual modes.

Automatic mode provides:

Temperature and humidity display;
Vacuum measurement;
Time control;
Evacuation;
Automatic pressure holding;
Automatic venting;
Touchscreen display and control.

Manual mode permits individual operation of:

Evacuation;
Humidification;
Venting.

The system retains settings during a power failure. When power is restored after an unexpected outage, the parameters in effect before the outage are retained and operation can continue.

The equipment provides automatic digital storage, records the complete operating process, and supports remote computer communication, data storage, and warning alerts.

SA Series Models

No.	Model	Capacity（m³）	Chamber dimensions： × × （mm）	Overall dimensions： × × （mm）	/ Weight（kg）	MaterialWeight（kg）	22×31×4（cm）	（kW）
1	SA-0.5	0.5	630×500×1600	980×650×1800	400	310	108–115	1
2	SA-0.6	0.6	750×500×1600	1200×650×1800	500	328	128–135	1
3	SA-0.8	0.8	1000×500×1600	1450×650×1800	650	340	176–182	1.5
4	SA-1	1	900×700×1600	1200×850×1800	680	366	224–232	1.5
5	SA-1.25	1.25	980×800×1600	1380×950×1800	760	390	288–295	3
6	SA-1.5	1.5	1180×800×1600	1930×950×1800	840	424	312–320	3
7	SA-2	2	1130×980×1800	1900×1160×2000	920	462	495–502	4
8	SA-3	3	1350×1250×1800	2250×1500×2050	1240	528	672–682	6
9	SA-4	4	1700×1300×1800	2700×1600×2050	1560	654	896–906	6.5
10	SA-5	5	2150×1300×1800	3150×1600×2050	1880	780	1120–1132	6.8
11	SA-8	8	2960×1500×1800	4000×1800×2050	2840	1088	1792–1805	8
12	SA-10	10	3700×1500×1800	4900×1800×2050	3480	1360	2240–2253	9
13	SA-15	15	5560×1500×1800	7060×1800×2050	5080	2040	3360–3375	10
14	SA-17	17	5250×1800×1800	6750×2100×2050	5720	2312	3808–3828	12

Material & Structure Options

The vacuum treatment chamber can use:

Stainless steel;
Q235 carbon steel;
Aerospace-grade material;
Transparent material.

The equipment can be fabricated in sections and assembled on site.

Selection & Installation

Selection should comprehensively consider:

Daily quantity of archives to be treated;
Treatment-room area;
Floor on which the equipment will be installed;
Floor load-bearing capacity;
Elevator rated load;
Corridor and treatment-room door widths;
Equipment dimensions and weight;
Transport route;
Vacuum-enclosure material;
Power-supply conditions.

Customization

Options according to project requirements include:

Equipment volume;
Vacuum-chamber dimensions;
Enclosure material;
Mobile trolley;
Automatic humidification and dehumidification;
Remote control;
Data storage;
Warning alerts;
Optional low-temperature freezing module;
Automatic or manual operation.

Nitrogen Anoxic Treatment System for Museum Collections

Ambient-Pressure Nitrogen Anoxia

Configuration Overview

Working Principle

Key Functions

Treatment Forms

Ambient-Pressure Treatment Performance

SADY Series Models

Large Anoxic Room System

Room-in-Room Anoxic Storage

Low-Oxygen Nitrogen Freezing Treatment

Suitable Collections

Customization

Configuration Overview

Working Principle

Key Functions

System Composition

Technical Specifications

Automatic Control

Safety System

SACD Series Models

Material & Structure Options

Selection & Installation

Suitable Collections

Configuration Overview

Working Principle

Key Functions

Suitable Materials

Equipment Structure

Technical Specifications

Operation & Control System

SA Series Models

Material & Structure Options

Selection & Installation

Customization

Continue the product and project evaluation.

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