China OEM 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





Packaging & Shipping





1. What is your MOQ?
    – The MOQ of this product is usually 5000 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

Can Rigid Couplings Be Used in Both Horizontal and Vertical Shaft Arrangements?

Yes, rigid couplings can be used in both horizontal and vertical shaft arrangements. Rigid couplings are designed to provide a solid, non-flexible connection between two shafts, making them suitable for various types of shaft orientations.

Horizontal Shaft Arrangements: In horizontal shaft arrangements, the two shafts are positioned parallel to the ground or at a slight incline. Rigid couplings are commonly used in horizontal setups as they efficiently transmit torque and maintain precise alignment between the shafts. The horizontal orientation allows gravity to aid in keeping the coupling elements securely in place.

Vertical Shaft Arrangements: In vertical shaft arrangements, the two shafts are positioned vertically, with one shaft above the other. This type of setup is often found in applications such as pumps, compressors, and some gearboxes. Rigid couplings can also be used in vertical shaft arrangements, but additional considerations must be taken into account:

  • Keyless Design: To accommodate the vertical orientation, some rigid couplings have a keyless design. Traditional keyed couplings may experience issues with keyway shear due to the force of gravity on the key, especially in overhung load situations.
  • Set Screw Tightening: When installing rigid couplings in vertical shaft arrangements, set screws must be tightened securely to prevent any axial movement during operation. Locking compound can also be used to provide additional security.
  • Thrust Load Considerations: Vertical shaft arrangements may generate thrust loads due to the weight of the equipment and components. Rigid couplings should be chosen or designed to handle these thrust loads to prevent axial displacement of the shafts.

It’s essential to select a rigid coupling that is suitable for the specific shaft orientation and operating conditions. Proper installation and alignment are critical for both horizontal and vertical shaft arrangements to ensure the rigid coupling’s optimal performance and reliability.

rigid coupling

Impact of Rigid Coupling on the Overall Reliability of Connected Equipment

A rigid coupling plays a crucial role in enhancing the overall reliability of connected equipment in mechanical systems. Here’s how it positively impacts reliability:

1. Power Transmission Efficiency: Rigid couplings provide a direct and efficient connection between the shafts of the connected equipment. With no flexible elements, there is minimal power loss, ensuring efficient power transmission from one shaft to another.

2. Elimination of Backlash: Rigid couplings have zero backlash, which is crucial in precision applications. Backlash, which is the play or clearance between connected components, can cause inaccuracies in motion control systems. With a rigid coupling, any movement is directly transferred, maintaining precise positioning.

3. Zero-Maintenance Option: Some rigid couplings are designed to be maintenance-free. They do not require lubrication or periodic adjustments, reducing downtime and ensuring continuous operation.

4. High Torque Transmission: Rigid couplings can handle high torque loads, making them suitable for heavy-duty applications. Their robust construction ensures reliable torque transmission without failure or slippage.

5. Resistant to Misalignment: While rigid couplings offer no flexibility, they are excellent at handling axial misalignment and angular misalignment, provided it falls within their design limits. This ability to tolerate some misalignment enhances reliability and reduces the risk of component damage.

6. Vibration Damping: The stiffness of rigid couplings aids in damping vibrations generated during operation. By minimizing vibrations, the coupling helps protect connected equipment from excessive stress and fatigue failure.

7. Increased System Stiffness: Rigid couplings contribute to the overall stiffness of the mechanical system. This stiffness improves the dynamic response of the system and reduces the likelihood of resonance, leading to more reliable operation.

8. Simple and Compact Design: Rigid couplings have a straightforward and compact design, which reduces the chances of component failure or wear. Their simplicity makes them easy to install and maintain, further enhancing system reliability.

9. Suitable for High-Speed Applications: Rigid couplings are well-suited for high-speed applications due to their ability to maintain accurate shaft alignment and transmit torque efficiently.

10. Compatibility with Various Industries: Rigid couplings find applications in a wide range of industries, including automotive, aerospace, manufacturing, and more. Their versatility and reliability make them a popular choice in demanding industrial environments.

Overall, the use of a properly selected and installed rigid coupling enhances the reliability of connected equipment by providing a robust and efficient connection between shafts. It ensures precise power transmission, reduced maintenance requirements, and improved system performance, leading to increased overall reliability and uptime of the mechanical system.

rigid coupling

Materials Used in Manufacturing Rigid Couplings:

Rigid couplings are designed to provide a strong and durable connection between two shafts, and they are commonly made from a variety of materials to suit different applications. The choice of material depends on factors such as the application’s environment, load capacity, and cost considerations. Some common materials used in manufacturing rigid couplings include:

  • 1. Steel: Steel is one of the most widely used materials for rigid couplings. It offers excellent strength, durability, and resistance to wear. Steel couplings are suitable for a wide range of applications, including industrial machinery, automotive systems, and power transmission.
  • 2. Stainless Steel: Stainless steel couplings are used in applications where corrosion resistance is crucial. They are well-suited for environments with high humidity, moisture, or exposure to chemicals. Stainless steel couplings are commonly used in food processing, pharmaceuticals, marine, and outdoor applications.
  • 3. Aluminum: Aluminum couplings are known for their lightweight and corrosion-resistant properties. They are often used in applications where weight reduction is essential, such as aerospace and automotive industries.
  • 4. Brass: Brass couplings offer good corrosion resistance and are commonly used in plumbing and water-related applications.
  • 5. Cast Iron: Cast iron couplings provide high strength and durability, making them suitable for heavy-duty industrial applications and machinery.
  • 6. Bronze: Bronze couplings are known for their excellent wear resistance and are often used in applications involving heavy loads and low speeds.
  • 7. Plastics: Some rigid couplings are made from various plastics, such as nylon or Delrin. Plastic couplings are lightweight, non-conductive, and suitable for applications where electrical insulation is required.

It’s essential to consider the specific requirements of the application, including factors like load capacity, operating environment, and cost, when choosing the appropriate material for a rigid coupling. The right material selection ensures that the coupling can withstand the forces and conditions it will encounter, resulting in a reliable and long-lasting connection between the shafts.

China OEM CHINAMFG Center Stop Coupling 1/2~8-Inch for CSA Compliant Schedule40 Rigid PVC Conduits  China OEM CHINAMFG Center Stop Coupling 1/2~8-Inch for CSA Compliant Schedule40 Rigid PVC Conduits
editor by CX 2024-03-29





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