In industrial equipment, cable assemblies are often exposed to conditions that can gradually affect their service life. Vibration, friction against machine components, contact with sharp edges, and repeated movement may wear down cable insulation over time. A suitable protective conduit helps create a barrier between wiring and the surrounding environment, supporting more organized installation and reducing the risk of mechanical damage.
One practical option is the Slit Type Corrugated Pipe, which features a longitudinal opening that allows installers to fit the conduit around an existing cable bundle. Unlike a fully enclosed tube, this design does not require every cable to be threaded through the conduit from one end. It can therefore be useful for equipment assembly, wiring upgrades, and maintenance tasks where disconnecting existing connections would be inconvenient.
The SB-OTCP slit type series from Sunbow is available in PE, PP, and PA materials, with multiple size options for different cable protection requirements. Its flexible corrugated construction makes it suitable for cable routing in machinery, electrical equipment, motors, and other industrial applications.
Understanding the Structure of Slit Corrugated Conduit
A slit corrugated conduit is a flexible protective tube with a continuous opening running along its length. Its corrugated profile creates a series of ridges and grooves, allowing the conduit to follow cable routes that are not completely straight.
The longitudinal slit is its most distinctive design feature. Installers can open the conduit and place it around a group of wires, rather than feeding the wires through an enclosed tube. This can simplify work in situations where cables are already connected to terminals, sensors, motors, or control components.
For example, when an existing machine undergoes maintenance, technicians may need to add protection to exposed wiring without dismantling the entire cable assembly. A slit design provides a convenient way to cover the relevant cable sections while keeping existing connections in place.
The corrugated construction also supports routing through equipment spaces with bends and changes in direction. Its flexibility can help installers work around structural components, although the permitted bending radius and installation conditions should always be considered.
Key Characteristics for Industrial Cable Protection
Cable conduits serve different purposes depending on their material, structure, and installation environment. When evaluating a slit type product, buyers should look beyond its basic function and consider the following characteristics.
Flexible Routing Structure
The corrugated profile allows the conduit to follow curved cable paths more easily than a rigid protective tube. This is useful in machinery with limited installation space or wiring routes that pass around mechanical components.
The longitudinal opening provides an additional installation advantage. Existing cable bundles can be covered without removing connectors or disconnecting wires, which may help simplify maintenance and equipment modifications.
Protection Against Abrasion
Wiring inside industrial equipment may experience friction due to vibration, movement, or contact with nearby surfaces. A protective conduit creates an additional layer around the cables, helping reduce direct contact with surrounding components.
The SB-OTCP series is specified with good abrasion resistance. Its suitability for a particular installation will depend on factors such as contact pressure, movement frequency, cable routing, and the selected material.
Chemical and Fire-Related Considerations
Acid resistance and fire resistance are also identified among the product's characteristics. These properties may be relevant when selecting cable protection for industrial environments.
However, chemical compatibility should be assessed according to the actual substance, concentration, exposure duration, and operating temperature. Similarly, fire-related performance should be checked against the applicable test requirements and the specifications of the selected material grade.
Buyers should confirm the relevant technical documentation before using the conduit in installations with demanding chemical or fire-safety requirements.
Corrugated Inner and Outer Profiles
The product features a corrugated structure on both its inner and outer surfaces. This design contributes to its flexible conduit form and should be considered when evaluating cable insertion, internal clearance, and the overall routing arrangement.
The inner diameter needs to provide sufficient room for the intended cable bundle. Selecting a suitable size helps avoid unnecessary compression and makes installation more manageable.
Comparing PE, PP, and PA Materials
Material selection is an important part of choosing a protective conduit. The SB-OTCP slit type series is available in three material options: polyethylene (PE), polypropylene (PP), and polyamide (PA). Each has a different specified working temperature range.
| Material | Working temperature | Selection reference |
|---|---|---|
| PE | -30°C to +100°C | Applications within the specified PE temperature range |
| PP | -40°C to +110°C | Applications requiring the stated PP temperature range |
| PA | -40°C to +125°C | Applications requiring the highest upper temperature limit among these options |
Temperature is an important starting point, but it should not be the only factor in the selection process.
For example, cable routes near motors, heating components, or power electronics may experience higher temperatures than the surrounding equipment enclosure. Buyers should consider normal operating conditions as well as temporary temperature peaks.
PE may be considered where the operating temperature remains within its specified range. PP provides a higher stated upper limit, while PA offers the highest upper temperature limit of the three listed options.
Other considerations include flexibility, mechanical contact, chemical exposure, available installation space, and the equipment manufacturer's requirements. Where operating conditions are complex, material compatibility should be confirmed using the relevant product documentation.
Where Slit Type Corrugated Pipes Are Used
Slit corrugated conduits are useful in applications where cable bundles need additional protective coverage and where installation access is an important consideration.
Industrial Machinery and Automation
Industrial machines contain wiring for motors, sensors, control units, switches, and other electrical components. These cables may pass through narrow spaces or run close to moving mechanical parts.
A flexible protective conduit can help separate cable bundles from surrounding surfaces. The slit structure is particularly convenient when additional protection needs to be installed after machine assembly or during maintenance.
Electrical Equipment and Control Cabinets
Electrical systems often contain multiple groups of wires connecting meters, switches, control devices, and power components. Organizing these wires within protective conduits can make cable routing easier to manage.
The SB-OTCP series can be considered for suitable wiring sections in electrical equipment, provided that the selected material, dimensions, and operating conditions meet the installation requirements.
Food Processing Machinery
Food processing machines may include motors, sensors, and automated control systems with wiring routed through different sections of the equipment.
A slit corrugated conduit can provide additional mechanical coverage for suitable cable routes. However, its use in food processing machinery does not automatically establish suitability for direct food contact or every cleaning process. Buyers should verify chemical compatibility, hygiene requirements, and the equipment manufacturer's specifications.
Automatic Meters and Gauges
Automatic instruments rely on electrical connections for monitoring, measurement, and signal transmission. During installation and equipment operation, exposed wiring may be subject to abrasion or contact with nearby components.
A slit conduit can be fitted around existing cable sections, making it a practical option when upgrading the protection of assembled instruments.
Motors and Electrical Drive Systems
Motor installations may involve wiring routed through compact spaces where vibration and heat are important considerations. Protective conduits can help cover cable sections and reduce direct contact with surrounding components.
For these applications, buyers should evaluate the temperature near the motor, the cable's movement during operation, and the available routing space before selecting a material and size.
Selecting the Correct Conduit Dimensions
Correct sizing is essential for practical installation. If the inner diameter is too small, inserting the cable bundle may be difficult and the wires may become unnecessarily compressed. An oversized conduit, on the other hand, may take up excessive space or be harder to secure within the equipment.
The SB-OTCP range provides inner diameters from 5 mm to 48 mm and outer diameters from 7 mm to 54.5 mm.
| Item number | Inner diameter (mm) | Outer diameter (mm) | Packing (m/roll) |
|---|---|---|---|
| AD7.0 | 5.0 | 7.0 | 500 |
| AD7.5 | 5.5 | 7.5 | 500 |
| AD9.0 | 6.0 | 9.0 | 500 |
| AD10.0 | 7.0 | 10.0 | 500 |
| AD11.0 | 8.0 | 11.0 | 500 |
| AD12.0 | 9.0 | 12.0 | 500 |
| AD13.0 | 10.0 | 13.0 | 500 |
| AD14.0 | 11.0 | 14.0 | 200 |
| AD15.8 | 12.0 | 15.8 | 200 |
| AD18.5 | 14.3 | 18.5 | 200 |
| AD19.0 | 15.0 | 19.0 | 200 |
| AD21.2 | 17.0 | 21.2 | 200 |
| AD22.0 | 18.0 | 22.0 | 100 |
| AD23.0 | 19.0 | 23.0 | 100 |
| AD25.0 | 20.0 | 25.0 | 100 |
| AD27.0 | 22.0 | 27.0 | 100 |
| AD28.5 | 23.0 | 28.5 | 100 |
| AD30.0 | 25.0 | 30.0 | 100 |
| AD32.0 | 27.0 | 32.0 | 100 |
| AD34.5 | 29.0 | 34.5 | 100 |
| AD42.5 | 36.0 | 42.5 | 50 |
| AD54.5 | 48.0 | 54.5 | 25 |
Before ordering, buyers should review several dimensions of the installation:
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Cable bundle diameter: Measure the complete bundle rather than selecting a conduit based on a single cable.
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Installation clearance: Allow enough internal space for convenient fitting, especially where several wires follow bends.
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External dimensions: Check whether the conduit can pass through equipment openings and fit within the available routing space.
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Required length: Estimate the total cable route and compare it with the standard roll packaging.
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Material suitability: Match PE, PP, or PA to the working temperature and environmental conditions.
Customized dimensions are also supported. Where standard sizes do not match the cable assembly or equipment layout, buyers can discuss alternative specifications with the manufacturer.
Slit Type and Closed Corrugated Conduits: Installation Differences
Slit and closed corrugated conduits share the purpose of providing protective coverage for cables, but their installation methods are different.
A closed conduit generally requires the cables to be inserted through an accessible end. This method can work well in new equipment assembly, particularly when wiring is installed before connectors and terminals are attached.
A slit type conduit can be opened along its length and positioned around an existing cable bundle. This makes it useful for maintenance, retrofitting, and installations where cable ends are already connected.
The preferred option depends on the wiring process and the requirements of the equipment. A new machine assembly may use a closed conduit for certain cable routes, while a maintenance team may prefer a slit version when adding protection to existing wiring.
During installation, attention should also be given to the position of the slit and the method used to secure the conduit. The completed arrangement should keep the cables appropriately covered throughout normal equipment operation.
Color and Customization for Different Wiring Systems
The standard color of the SB-OTCP series is black, with other colors available upon request.
In industrial wiring systems, color variations can help distinguish cable groups, identify equipment sections, or support internal cable management procedures. Any color-coding arrangement should follow the customer's engineering requirements and relevant industry standards.
Alongside color options, customized dimensions provide additional flexibility for equipment manufacturers. When requesting a customized version, buyers should prepare information such as:
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Required material: PE, PP, or PA
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Preferred inner and outer diameters
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Desired color
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Working temperature range
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Cable bundle dimensions
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Installation environment and estimated order quantity
Providing these details helps suppliers evaluate the intended application and identify an appropriate product specification.
Manufacturing Capability and Quality Management in Cable Protection
The reliability of a protective conduit is influenced by material consistency, manufacturing processes, dimensional control, and quality management. For industrial buyers, these factors become particularly important when sourcing products for repeated production or long-term equipment programs.
Shenzhen Sunbow Insulation Materials MFG. Co., Ltd. was established in 2003 and focuses on the research, development, manufacturing, and sales of insulation sleeves and related protective materials. Its product portfolio includes fiberglass sleeving, heat shrinkable tubing, PVC tubing, silicone rubber tubing, PTFE tubing, expandable sleeves, corrugated pipes, and polyimide film tubes.
The company has developed more than 60 patents and received recognition as a Shenzhen High-tech Enterprise and a National High-tech Enterprise. It was also recognized as a technology-based enterprise in Guangming District and a specialized and innovative small and medium-sized enterprise in Shenzhen in 2022.
To support its manufacturing operations, Sunbow maintains facilities in Gongming, Shenzhen, and Qiaotou, Dongguan. The two production sites cover nearly 20,000 m², with a combined monthly output of more than 40 million meters of various sleeves.
Its quality management systems include ISO 9001:2015 and IATF 16949:2016 certifications, which are relevant to its manufacturing and automotive supply activities. The company also reports UL and CSA certifications for specified product categories, including fiberglass sleeving, heat shrinkable tubing, PTFE tubing, silicone rubber tubing, PVC tubing, and expandable sleeves. Its products are also reported to comply with EU RoHS and REACH requirements.
Sunbow serves a broad range of industries, including household appliances, motors, electrical equipment, automotive wiring systems, power distribution, telecommunications, energy storage, and new energy applications. Its automotive-related products are indexed in the International Material Data System (IMDS), and the company has developed supply relationships with international automotive manufacturers and related customers.
For buyers evaluating protective conduit suppliers, manufacturing capacity, technical support, product documentation, and the ability to provide suitable specifications are all relevant considerations.
Conclusion
Cable routing in industrial equipment requires attention to mechanical protection, installation convenience, material selection, and dimensional compatibility. A slit corrugated conduit offers a useful alternative when cable bundles need to be covered without threading them through a closed tube, particularly during maintenance or modifications to existing wiring systems.
With PE, PP, and PA material options, a range of inner diameters from 5 mm to 48 mm, and support for customized specifications, the Slit Type Corrugated Pipe SB-OTCP (slit type) can be considered for cable protection in machinery, electrical equipment, motors, automatic instruments, and other suitable industrial applications.
The best selection depends on the cable bundle size, operating temperature, installation space, and environmental conditions. Evaluating these factors before procurement helps ensure that the conduit matches the actual requirements of the equipment. For industrial buyers seeking different insulation and cable protection products, Shenzhen Sunbow Insulation Materials MFG. Co., Ltd. offers a broader portfolio supported by established manufacturing facilities and quality management systems. The Slit Type Corrugated Pipe SB-OTCP (slit type) is one option within this product range for applications where flexible routing and convenient installation are important.
www.sunbowtech.com
Shenzhen Sunbow Insulation Materials MFG. Co., Ltd.
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