China factory CHINAMFG Center Stop Coupling 1/2~8-Inch for CSA Compliant Schedule40 Rigid PVC Conduits

Product Description

Product Description

Product Details

Ctube Schedule 40 & 80 Electrical PVC Conduit coupling is sturdy and durable, with excellent properties such as tensile strength, punching resistance, water absorption, etc., and we are a UL Listed manufacturer widely recognized in the industry. Such coupling is used for conneting Schedule 40 & 80 Electrical PVC Conduit pipes.
For over 10 years, we have been committed to offering the best PVC conduit for commercial, residential, and public facilities. Schedule 40 & 80 PVC conduit pipes and fittings can be used in underground, floor, and outdoor environments and will provide years of maintenance-free use. Compared with metal conduits, PVC electrical conduits have the pros such as light weight, good insulation,  sunlight resistance, and lightweight. They are also the best choice for commercial and residential projects.
UL Listed & CSA Approval. UL 651 listed and CSA approval electrical PVC conduit pipes and fittings are prefect match with your project & wholesales in US & CA market. 
UL 94 V-0 & FT4 FIRE RATING. No flaming once cut off the fire source means the greatest fire rating in the industry. 
NON-METALLIC PVC PIPE. heat-,corrosion-,fire-,sunlight-,rust resistant are pros for schedule 40 PVC rigid pipes. 
MULTI-PURPOSE. Whether you routing the electrical wiring conduits aboveground or underground, they both work well.
CUSTOMIZED SERVICES. Thickness and color can be customized to 100% meet your business requirement.


Tensile Strength 5000 CHINAMFG (3.45 kN/cm2)
Extrusion Fusion
Water Absorption <0.50% of Whole Weight After Soak
Resistance to Crushing ID≥70% After Test
Resistance to Impact Less Than 3 of 1/32 inch Cracks &   Tears
Deflection under Load <0.25mm Deformation
Fire Rating UL 94 V-0 & FT4
Resistance to Specific Reagents Less ±2.50% Weight After 60 / 120 Days Soak
Permanency of Printing Yes
Rust & Sunlight Resistant Yes
Color Grey or Customized
Material UPVC
Customized Services Available 
Place of Origin HangZhou, China
Shipping By sea
Samples Available
Length As per standard, can be customized

Quality Assurance
Ctube applied a strict quality management system such as ISO9001:2015 to control the quality of products, and we have established a stricter quality audit system within the factory to ensure that the quality of the products you buy is in the best condition.
At the same time, our products comply with CSA, UL, AS/NZS, IEC and other organizational standards, which can ensure that you can buy high-quality products.

Ctube schedule 40 rigid PVC conduit couplings are sunlight resistant and used exposed, encased in concrete, concealed in walls, and in direct burial applications including systems for:
– Utilities;
– Cable, data, and communication lines;
– Institutional, commercial, and industrial buildings;

Size Chart

Nominal Size Item No. W (in) L (in) ID (in)
1/2 CT-SC 1.065 1.500 0.852
3/4 CT-SC 1.307 1.563 1.064
1 CT-SC 1.602 2.000 1.329
1-1/4 CT-SC 2.019 2.165 1.677
1-1/2 CT-SC 2.252 2.357 1.918
2 CT-SC 2.744 2.600 2.393
2-1/2 CT-SC 3.350 3.500 2.890
3 CT-SC 4.035 3.875 3.515
3-1/2 CT-SC 4.539 4.000 4.015
4 CT-SC 5.039 4.188 4.515
5 CT-SC 6.168 5.375 5.593
6 CT-SC 7.430 6.375 6.658
8 CT-SC 9.315 8.346 8.669


Company Profile

Manufacturing Capability

– Production capacity: 50000 pieces per week
– Packaging methods: plastic bags & PE films, by carton box

Our Advantages



Quality Certification:

– UL Listed
– Compliance with CSA, ETL, and ASTM, NEMA TC-3





Packaging & Shipping





1. What is your MOQ?
    – The MOQ of this product is usually 3000 pieces.
2. What is your delivery time?
    – It depends on the location. Normally the delivery time is around 15-30 days in North America.
3. What is the shipping port?
    – We usually ship the cargo via HangZhou Port.
4. What is your payment term?
    – We accept T/T, or L/C,can be negotiated.
5. How should I contact you?
    – You can contact us by submitting an inquiry form here. → contact us
6. How about the samples?
    – Normally we can provide free samples unless you require too many. 

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rigid coupling

How Do Rigid Couplings Compare to Other Types of Couplings in Terms of Performance?

Rigid couplings offer specific advantages and disadvantages compared to other types of couplings, and their performance depends on the requirements of the application:

1. Performance: Rigid couplings provide excellent torque transmission capabilities and are best suited for applications that demand precise and efficient power transfer. They have minimal backlash and high torsional stiffness, resulting in accurate motion control.

2. Misalignment Tolerance: Rigid couplings cannot tolerate misalignment between shafts. They require precise shaft alignment during installation, which can be time-consuming and may result in increased downtime during maintenance or repairs.

3. Vibration Damping: Rigid couplings offer no damping of vibrations, which means they may not be suitable for systems that require vibration isolation or shock absorption.

4. Maintenance: Rigid couplings are generally low maintenance since they have no moving parts or flexible elements that can wear out over time. Once properly installed, they can provide reliable performance for extended periods.

5. Space Requirements: Rigid couplings are compact and do not add much length to the shaft, making them suitable for applications with limited space.

6. Cost: Rigid couplings are usually more economical compared to some advanced and specialized coupling types. Their simpler design and lower manufacturing costs contribute to their affordability.

7. Application: Rigid couplings are commonly used in applications where shafts are precisely aligned and no misalignment compensation is necessary. They are prevalent in precision machinery, robotics, and applications that require accurate motion control.

In contrast, flexible couplings, such as elastomeric, jaw, or beam couplings, are designed to accommodate misalignment, dampen vibrations, and provide some degree of shock absorption. Their performance is ideal for systems where shafts may experience misalignment due to thermal expansion, shaft deflection, or dynamic loads.

In summary, rigid couplings excel in applications that demand precise alignment and high torque transmission, but they may not be suitable for systems that require misalignment compensation or vibration damping.

rigid coupling

What Role Does a Rigid Coupling Play in Reducing Downtime and Maintenance Costs?

A rigid coupling can play a significant role in reducing downtime and maintenance costs in mechanical systems by providing a robust and reliable connection between two shafts. Here are the key factors that contribute to this:

1. Durability and Longevity: Rigid couplings are typically made from high-quality materials such as steel or stainless steel, which offer excellent durability and resistance to wear. As a result, they have a longer service life compared to some other types of couplings that may require frequent replacements due to wear and fatigue.

2. Elimination of Wear-Prone Components: Unlike flexible couplings that include moving parts or elements designed to accommodate misalignment, rigid couplings do not have any wear-prone components. This absence of moving parts means there are fewer components that can fail, reducing the need for regular maintenance and replacement.

3. Minimization of Misalignment-Related Issues: Rigid couplings require precise shaft alignment during installation. When installed correctly, they help minimize misalignment-related issues such as vibration, noise, and premature bearing failure. Proper alignment also reduces the risk of unexpected breakdowns and maintenance requirements.

4. Increased System Efficiency: The rigid connection provided by a rigid coupling ensures efficient power transmission between the two shafts. There is minimal power loss due to flexing or bending, leading to better overall system efficiency. This efficiency can result in reduced energy consumption and operating costs.

5. Low Maintenance Requirements: Rigid couplings generally require minimal maintenance compared to some other coupling types. Once properly installed and aligned, they can operate for extended periods without needing frequent inspection or adjustment.

6. Reduced Downtime: The robust and reliable nature of rigid couplings means that they are less likely to fail unexpectedly. This increased reliability helps reduce unscheduled downtime, allowing the mechanical system to operate smoothly and consistently.

7. Cost-Effective Solution: While rigid couplings may have a higher upfront cost than some other coupling types, their long-term durability and low maintenance requirements make them a cost-effective solution over the life cycle of the equipment.

In conclusion, a rigid coupling’s ability to provide a durable and dependable connection, along with its low maintenance requirements and efficient power transmission, contributes significantly to reducing downtime and maintenance costs in mechanical systems.

rigid coupling

What is a Rigid Coupling and How Does it Work?

A rigid coupling is a type of mechanical coupling used to connect two shafts together at their ends to transmit torque and rotational motion without any flexibility or misalignment accommodation. Unlike flexible couplings, rigid couplings do not allow for angular, parallel, or axial misalignment between the shafts. The main purpose of a rigid coupling is to provide a strong and solid connection between two shafts, ensuring precise and synchronous power transmission between them.

Structure and Design:

Rigid couplings are typically made from durable materials such as steel, stainless steel, or aluminum, which can withstand high torque and load applications. The coupling consists of two halves, each with a cylindrical bore that fits tightly onto the respective shafts. The two halves are then fastened together using bolts or set screws to ensure a secure and rigid connection.

Working Principle:

The working principle of a rigid coupling is straightforward. When the two shafts are aligned precisely and the coupling is securely fastened, any torque applied to one shaft gets directly transferred to the other shaft. The rigid coupling essentially makes the two shafts act as one continuous shaft, allowing for synchronous rotation without any relative movement or play between them.


Rigid couplings are commonly used in applications where precise alignment and torque transmission are essential. Some common applications of rigid couplings include:

  • High-precision machinery and equipment
  • Robotics and automation systems
  • Precision motion control systems
  • Machine tools
  • Shaft-driven pumps and compressors


The key advantages of using rigid couplings include:

  • High Torque Transmission: Rigid couplings can handle high torque and power transmission without any loss due to flexibility.
  • Precision: They provide accurate and synchronous rotation between the shafts, making them suitable for precise applications.
  • Simple Design: Rigid couplings have a simple design with minimal moving parts, making them easy to install and maintain.
  • Cost-Effective: Compared to some other coupling types, rigid couplings are generally more cost-effective.


Despite their advantages, rigid couplings have certain limitations:

  • No Misalignment Compensation: Rigid couplings cannot accommodate any misalignment between the shafts, making precise alignment during installation crucial.
  • Transmits Vibrations: Since rigid couplings do not dampen vibrations, they can transmit vibrations and shocks from one shaft to the other.
  • Stress Concentration: In some applications, rigid couplings can create stress concentration at the ends of the shafts.

In summary, rigid couplings are ideal for applications that require precise alignment and high torque transmission. They offer a robust and straightforward solution for connecting shafts and ensuring synchronous power transmission without any flexibility or misalignment accommodation.

China factory CHINAMFG Center Stop Coupling 1/2~8-Inch for CSA Compliant Schedule40 Rigid PVC Conduits  China factory CHINAMFG Center Stop Coupling 1/2~8-Inch for CSA Compliant Schedule40 Rigid PVC Conduits
editor by CX 2024-04-16

As one of leading rigid coupling manufacturers, suppliers and exporters of mechanical products, We offer rigid coupling and many other products.

Please contact us for details.

Mail:[email protected]

Manufacturer supplier exporter of rigid coupling

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