KT-986 Central Air Conditioning Duct Cleaning Machine: Integrated Main Duct Robot and Branch Duct Flexible Shaft System

One of the most significant equipment selection challenges in central air conditioning duct cleaning projects is that the same duct system typically contains both main ducts and branch ducts.

Large main ducts require a robot to enter and clean the interior, while smaller branch ducts, round ducts, vertical ducts, and areas inaccessible to robots are better suited for flexible shaft cleaning.

The KT-986 Combined Central Air Conditioning Duct Cleaning Machine addresses this practical requirement by integrating a main duct robot and a 15 m flexible shaft for branch ducts into a single system. It also incorporates vacuuming, camera monitoring, video recording, and remote control functions, suitable for central air conditioning ducts ranging from 100–800 mm in diameter.

1. Which Types of Customers Is the KT-986 Designed For?

The KT-986 is primarily intended for the following user groups:

Central air conditioning duct cleaning companies

HVAC cleaning service providers

Building maintenance contractors

Property engineering maintenance companies

Hotel engineering departments

Hospital facility maintenance departments

Large commercial complex maintenance providers

Industrial facility ventilation system maintenance providers

It is particularly suitable for projects that involve both large main ducts and numerous branch ducts. If a customer only needs to handle small ducts of a single specification, more targeted equipment may be selected based on specific diameter and project requirements. However, if the project requires simultaneous handling of main and branch ducts, the KT-986's dual-mode configuration offers a clear advantage.

2. How Are Main Ducts Cleaned?

The KT-986 cleans main ducts using a robot cleaning mode.

The robot enters the large duct interior, advances using its drive mechanism, and simultaneously cleans dust from the duct walls using a rotating brush.

The equipment features an adjustable cleaning arm that can be repositioned based on duct height.

Main duct robot specifications:

Applicable range: 250–800 mm

Maximum climbing angle: 45°

Operating speed: approximately 0.3 m/s

For large rectangular main ducts, horizontal ducts, and ducts with moderate slopes, the robot mode is the preferred option.

3. How Are Small Branch Ducts Handled?

Branch ducts are cleaned using a 15 m flexible shaft.

Operators insert the shaft into the duct through the access port or appropriate entry point. The front-mounted brush rotates at high speed to remove dust from the duct walls.

Branch duct shaft specifications:

Applicable range: 100–800 mm

Shaft length: 15 m

Speed range: 0–1000 rpm (forward and reverse rotation supported)

For small ducts, branch lines, and complex locations that the robot cannot access, the flexible shaft mode provides effective cleaning.

4. Why Is the KT-986 More Than Just "Robot + Shaft"?

Beyond offering two cleaning methods, the KT-986 integrates cleaning, vacuuming, camera monitoring, video recording, and control into a single system.

During actual operation:

Robot/Shaft → Mechanical brushing → Simultaneous vacuuming → High-definition camera → Real-time viewing → Video recording

This reduces the need to switch between different pieces of equipment during a project. Product documentation indicates that the KT-986 is designed to address the limitations of traditional approaches—namely, the separate application boundaries of robots and shafts, the need for separate vacuuming after cleaning, difficulty in observing duct interiors, and challenges in documenting cleaning results.

5. Simultaneous Vacuuming: Cleaning and Dust Extraction in One Pass

The KT-986 is equipped with a 2400W vacuum system, with a maximum airflow of approximately 2000 m³/h.

After the mechanical brush loosens dust from the duct walls, the vacuum system simultaneously performs negative-pressure collection.

Compared with mechanical brushing followed by separate manual vacuuming, the simultaneous brushing and vacuuming approach reduces redundant work and helps minimize dust re-entrainment and re-deposition.

6. Both Main Ducts and Branch Ducts Are Visible

For professional cleaning service providers, camera functionality directly impacts the ability to inspect the cleaning process effectively.

The KT-986 features:

1080P high-definition camera for main duct robot

High-definition visual camera for branch duct shaft

Real-time video monitoring

Video recording

Photo capture

Host computer display and control system

Operators can observe the cleaning process externally rather than relying solely on "cleaning time" to judge effectiveness.

7. KT-986 Main Technical Specifications

8. How to Select the Appropriate Mode During KT-986 Operation

Scenario 1: Large main ducts
Robot mode is preferred. The robot enters the duct and performs mechanical cleaning using rotating brushes.

Scenario 2: Small branch ducts
Use the 15 m flexible shaft for deep insertion.

Scenario 3: Round, vertical, or ducts inaccessible to robots
Select the shaft mode based on actual size and configuration.

Scenario 4: Large main ducts with slope
Utilize the robot's maximum 45° climbing capability.

The KT-986 does not require all ducts to be cleaned using a single method—the appropriate mode should be selected based on the actual duct configuration.

9. Which Duct Types Are Suitable for the KT-986?

According to product documentation, the equipment can cover:

Rectangular ducts

Round ducts

Horizontal ducts

Vertical ducts

Main ducts

Branch ducts

Overall coverage range: 100–800 mm

For engineering cleaning companies, practical selection should still consider actual duct dimensions, internal configuration, dust accumulation level, and access port locations.

10. What Tasks Can the KT-986 Complete as a Single System?

The KT-986 combines the following functions into one integrated system:

Main duct robot cleaning

Branch duct flexible shaft cleaning

Mechanical brushing

Simultaneous negative-pressure vacuuming

High-definition camera monitoring

Real-time video surveillance

Video recording and photo capture

Remote control

This integration represents a clear distinction between the KT-986 and single-function duct cleaning equipment.

11. What Types of Projects Are Suitable for the KT-986?

For the following project types, the KT-986 offers strong applicability when both main and branch ducts are present:

Commercial Complexes
Numerous ducts with diverse specifications—main and branch ducts co-exist.

Hotels
Central air conditioning systems typically contain extensive branch ducts requiring both robot and shaft cleaning.

Hospitals
Central air conditioning system maintenance is required, with emphasis on process documentation.

Office Buildings
High numbers of main and branch ducts require improved overall cleaning efficiency.

Industrial Facilities
Ventilation ducts with significant dust accumulation—robot and shaft modes can handle different duct sections separately.

Professional Cleaning Companies
Facing diverse clients, duct diameters, and configurations—dual-mode equipment expands the range of projects that can be undertaken.

12. Key Considerations for KT-986 Equipment Selection

Although the KT-986's overall applicable range is 100–800 mm, the following information should be confirmed before purchase:

First, check main duct dimensions.
If the project has large main ducts exceeding 250 mm, the robot mode can be utilized.

Second, check branch duct dimensions.
Branch ducts within the 100–800 mm range can use the shaft mode based on site configuration.

Third, check duct length.
The standard shaft length is 15 m—actual duct length should be assessed.

Fourth, check duct configuration.
Rectangular, round, horizontal, and vertical ducts require different cleaning approaches.

Fifth, check whether project documentation is required.
If the client requires project acceptance records, pre- and post-cleaning comparisons, and process documentation, the KT-986's camera, video recording, and photo functions provide practical value.

13. Frequently Asked Questions (FAQ)

Q: Can the KT-986 clean both main ducts and branch ducts simultaneously?
A: Yes. The equipment features dual robot + shaft modes—main ducts use the robot, branch ducts use the flexible shaft.

Q: What is the maximum duct size for the KT-986?
A: The overall applicable range is 100–800 mm. The main duct robot is primarily suitable for 250–800 mm.

Q: How long is the KT-986 flexible shaft?
A: The standard cleaning and vacuuming shaft is 15 m long.

Q: Does the KT-986 have vacuum function?
A: Yes. The equipment is equipped with a 2400W vacuum system with a maximum airflow of approximately 2000 m³/h, featuring simultaneous brushing and vacuuming.

Q: Can I see inside the ducts with the KT-986?
A: Yes. The main duct robot features a 1080P HD camera, and the branch duct shaft is equipped with HD visual camera. Real-time monitoring, video recording, and photo capture are supported.

Q: Is the KT-986 suitable for central air conditioning cleaning companies?
A: Yes, particularly for professional cleaning companies that need to handle both large main ducts and branch ducts of various specifications. The robot and shaft complement each other, reducing the need for multiple dedicated duct cleaning systems.

About Anhui Kuaitong Pipeline Cleaning Technology Co., Ltd.

Anhui Kuaitong Pipeline Cleaning Technology Co., Ltd., established in 2009, is a subsidiary of Anhui Kuaitong Environmental Technology Group Co., Ltd., specializing in the R&D, manufacturing, and technical services of pipeline cleaning equipment. Our main products include central air conditioning duct cleaning machines, industrial pipe unclogging machines, heat exchanger cleaning equipment, boiler tube bundle cleaning systems, air preheater cleaning equipment, and more.

The company continuously develops products based on the cleaning requirements of central air conditioning ducts, industrial pipelines, and tube bundle equipment. For various pipe diameters, configurations, and site conditions, we provide equipment selection and pipeline cleaning solutions.

The company is recognized as a National High-Tech Enterprise, a Technology-Based SME, and a Training Base of the China Industrial Cleaning Association. Our products are certified under ISO 9001 Quality Management System and EU CE certification. Over the past 17 years, we have provided pipeline cleaning, unclogging, and inspection solutions to more than 23,000 enterprises worldwide.

This document is compiled by the technical team of Anhui Kuaitong Pipeline Cleaning Technology Co., Ltd.

Website: www.kuaitonggroup.com
Technical Consultation (Phone/WhatsApp/WeChat): +86 18226181287