China Hot selling CHINAMFG Center Stop Coupling 1/2~8-Inch for UL651 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. UL 651 listed electrical PVC conduit pipes and fittings are prefect match with your project & wholesales in US & CA market. 
UL 94V-0 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 94V-0
Resistance to Specific Reagents Less ±2.50% Weight After 60 / 120 Days Soak
Permanency of Printing Yes
Rust & Sunlight Resistant Yes
Color Gery or Customized
Material PVC
Customized Services Available 
Place of Origin HangZhou, China
Shipping By sea
Samples Available
Length 10ft. or 20ft.

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, 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. 

  /* March 10, 2571 17:59:20 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1

rigid coupling

How Does a Rigid Coupling Protect Connected Equipment from Shock Loads and Vibrations?

Rigid couplings play a crucial role in protecting connected equipment from shock loads and vibrations by providing a direct and rigid connection between the shafts. The design and properties of rigid couplings contribute to their ability to mitigate the impact of shock loads and vibrations in the following ways:

High Stiffness: Rigid couplings are constructed from materials with high stiffness, such as steel or aluminum. This high stiffness allows them to resist deformation and bending under load, ensuring that the coupling remains stable and maintains its shape. As a result, the shock loads and vibrations are not amplified or transferred to the connected equipment.

Immediate Torque Transmission: Rigid couplings provide immediate torque transmission between the shafts without any backlash or play. When the connected machinery experiences a sudden shock load, the rigid coupling effectively transfers the torque to the other side of the coupling without delay. This rapid and precise torque transfer prevents the shock load from causing misalignment or damaging the equipment.

Elimination of Damping: Unlike flexible couplings, which can dampen vibrations to some extent, rigid couplings do not have any damping properties. While damping can be beneficial in certain applications, it can also allow vibrations to persist, potentially affecting the performance and reliability of the connected equipment. Rigid couplings do not introduce any additional damping, ensuring that the vibrations are not prolonged.

Stable Connection: Rigid couplings create a stable and unyielding connection between the shafts, limiting any relative movement. This stability prevents the propagation of vibrations from one shaft to another, reducing the potential for resonance and vibration amplification.

Minimal Maintenance: Rigid couplings require minimal maintenance due to their simple and durable design. Unlike flexible couplings that may have wear-prone elements, rigid couplings do not have parts that need regular replacement. This reliability and low maintenance contribute to their ability to provide continuous protection against shock loads and vibrations.

In applications where shock loads and vibrations are prevalent, using a rigid coupling can help protect critical machinery and components from damage and premature failure. By providing a rigid and immediate torque transmission, rigid couplings effectively isolate the connected equipment from the harmful effects of shock loads and vibrations, ensuring smooth operation and enhanced 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

Advantages of Using Rigid Couplings in Mechanical Systems:

Rigid couplings offer several advantages when used in mechanical systems. These advantages make them a preferred choice in certain applications where precise alignment and high torque transmission are essential. Here are the key advantages of using rigid couplings:

  • 1. High Torque Transmission: Rigid couplings are designed to handle high torque and power transmission without any loss due to flexibility. They provide a direct and solid connection between shafts, allowing for efficient transfer of rotational motion.
  • 2. Precise Alignment: Rigid couplings maintain precise alignment between connected shafts. When installed correctly, they ensure that the two shafts are perfectly aligned, which is crucial for applications where accurate positioning and synchronization are required.
  • 3. Synchronous Rotation: The rigid connection provided by these couplings enables synchronous rotation of the connected shafts. This is particularly important in applications where components must move in precise coordination with each other.
  • 4. Simple Design: Rigid couplings have a straightforward design with minimal moving parts. This simplicity makes them easy to install and maintain, reducing the chances of mechanical failure.
  • 5. Cost-Effective: Compared to some other coupling types, rigid couplings are generally more cost-effective. Their simple design and robust construction contribute to their affordability.
  • 6. High Strength and Durability: Rigid couplings are typically made from strong and durable materials such as steel, stainless steel, or aluminum. These materials can withstand heavy loads and provide long-lasting performance in demanding applications.

Rigid couplings are commonly used in various industries and applications, including high-precision machinery, robotics, automation systems, precision motion control, and machine tools. They are especially beneficial in scenarios where misalignment needs to be minimized or avoided altogether.

It’s important to note that while rigid couplings offer these advantages, they are not suitable for applications where shaft misalignment or shock absorption is required. In such cases, flexible couplings or other specialized coupling types may be more appropriate.

China Hot selling CHINAMFG Center Stop Coupling 1/2~8-Inch for UL651 Compliant Schedule40 Rigid PVC Conduits  China Hot selling CHINAMFG Center Stop Coupling 1/2~8-Inch for UL651 Compliant Schedule40 Rigid PVC Conduits
editor by CX 2024-01-12