Product Description
Product Description
A grooved reducing flex joint is a mechanical pipe joint that allows pipes of different diameters to be joined while providing a degree of flexibility. These couplings consist of 2 grooved end fittings and a flexible gasket or sleeve that is installed on the pipe. Grooves on the pipe ends provide a strong mechanical connection when the fitting is tightened.
Application:
Grooved reducing flexible joints are commonly used in a variety of piping systems such as:
CHINAMFG (Heating, Ventilation, and Air Conditioning): Used to connect ducts in CHINAMFG systems where flexibility may be required due to thermal expansion and contraction.
Fire Protection Systems: Typically used in fire sprinkler systems to connect pipes of different sizes while allowing for movement due to temperature changes.
Water and Wastewater Systems: For water and drainage systems where flexibility and ease of installation are important.
Industrial Piping: Used in industrial applications where grooved coupling systems are favored for their simplicity and speed of installation.
Material standards for groove couplings:
Material standards for grooved couplings are often set by industry organizations and standards bodies. The material used for grooved joints is usually ductile iron, but stainless steel and other materials can also be used, depending on the application and specific requirements.
Standards governing grooved couplings include:
ANSI/AWWA C606 – Groove and Shoulder Joints for Ductile Iron Pressure Piping and Fittings: This standard covers groove and shoulder joints for ductile iron pressure piping, fittings, and other components.
ASTM A536 – Standard Specification for Ductile Iron Castings: This standard covers compositional, mechanical, and other requirements for ductile iron castings.
NFPA 13 – Standard for Installation of Sprinkler Systems: This standard, published by the National Fire Protection Association, provides guidance for the installation of sprinkler systems, including the use of grooved joints.
| Nominal Size mm/in |
Pipe O.D
mm |
Working Pressure PSI/Mpa |
Dimensions mm | Bolt Size | Certificate | ||
| L | H | W | NO.-Size
mm |
||||
| 65X50/212X2 | 73X60 | 300/2.07 | 143 | 102 | 45 | M10X65 | FM UL |
| 65X50/30DX2 | 76X60 | 300/2.07 | 143 | 102 | 45 | M10X65 | FM UL |
| 80X50/3X2 | 89X60 | 300/2.07 | 163 | 118 | 47 | M12X70 | FMUL |
| 80X65/3X212 | 89X73 | 300/2.07 | 163 | 118 | 47 | M12X70 | FMUL |
| 100X50/4X2 | 114X60 | 300/2.07 | 200 | 150 | 50 | M12X70 | FMUL |
| 100X65/4X212 | 114X73 | 300/2.07 | 200 | 150 | 50 | M12X70 | FM UL |
| 100X65/4X3OD | 114X76 | 300/2.07 | 200 | 150 | 50 | M12X70 | FM UL |
| 100X80/4X3 | 114X89 | 300/2.07 | 200 | 150 | 50 | M12X70 | FMUL |
| 150X100/612ODX4 | 165X114 | 300/2.07 | 270 | 200 | 51 | M16X85 | FM UL |
| 150X80/6X3 | 168X89 | 300/2.07 | 270 | 200 | 51 | M16X85 | FMUL |
| 150X100/6X4 | 168X114 | 300/2.07 | 270 | 200 | 51 | M16X85 | FM UL |
| 200X150/8X612OD | 219X165 | 300/2.07 | 335 | 260 | 63 | M20X110 | FM UL |
| 200X150/8X6 | 219X168 | 300/2.07 | 335 | 260 | 63 | M20X110 | FMUL |
Quality Control:
what is the rigid and flexible Coupling difference?
Coupling play an important role in connecting pipe segments to prevent leaks caused by damaged or damaged joints while maintaining the integrity of the pipe in the process. It is a very suitable fitting for the pipe and pipe industry. Most pipe installations require multiple pipe sections to be joined together or cut to facilitate changing direction and traversing obstacles. A fitting is a concise pipe or pipe. It has a socket or female thread at 1 or both ends. Fitting allows 2 pipes or pipes of the same or different sizes to be joined together to form a long pipe.
Flexible coupling
Flexible couplings are designed to transmit torque while allowing some radial, axial and angular misalignment. They can accommodate angular misalignment of up to a few degrees and some parallel misalignment. Elastic couplings allow for some angular misalignment and axial movement, meaning they can be used to create smooth bends and absorb thermal expansion contractions in piping systems. In some cases, the use of elastic couplings can even exclude conventional expansion joints, loops and other expansion devices from the system entirely. When assembling a stretch rubber gasket, the gasket is slightly smaller than the pipe diameter at both pipe ends and produces the first seal. The 2 halves of the coupling are then placed around the washers that adapt to them. The coupling halves are bolted together to further improve the seal.
FAQ
1. What is the minimum quantity of the order?
Answer: The purchase volume of mixed products is 4 tons
2. How long is the delivery time of the order?
Answer: The delivery time for general orders is about 30 days. If the order is urgent and we have stock, around 7 days.
3. What payment methods do you accept?
Answer: We accept payment terms such as TT, L/C, DP, Western Union, Paypal, etc.
4. Where is your departure port of shipment? Is it possible to deliver to the designated warehouse?
Answer: The port of departure of our goods is generally ZheJiang Port or HangZhou Port. We can transport the goods to designated warehouses, such as HangZhou, HangZhou, etc.
5. What certificates do your products have?
Answer: Our products have FM/UL certificates, and we cooperate with third-party quality inspection certification before the factory, such as SGS,TUV
6.What are the series of your products?
Answer: Our products are divided into heavy series, medium series and light series according to different markets and standards. In order to buy more competitive products for you, please communicate your purchasing needs with the salesperson.
7. Do product packaging cartons and labels support customization?
Answer: Packaging cartons and labels can be customized according to customer requirements.
8.Does the purchased product support customization?
Answer: The product supports customization, but there are purchase quantity requirements and mold costs. For details, please consult the salesperson.
9.What are the packaging methods of the product?
Answer: The packaging of the product includes carton packaging, pallet packaging, wooden box packaging, and woven bag packaging.
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How does a flexible coupling handle electrical insulation between shafts?
Flexible couplings are typically not designed to provide electrical insulation between shafts. In most cases, flexible couplings are used solely for the purpose of transmitting mechanical power from one shaft to another while accommodating misalignment and absorbing shocks and vibrations. They do not offer any electrical isolation or insulation properties.
When electrical insulation is required between two rotating shafts in a system, additional components or specialized couplings are used. For applications where electrical isolation is necessary, insulated couplings or special insulation components can be employed. These types of couplings feature insulating materials, coatings, or designs that prevent electrical current from flowing between the connected shafts.
Insulated couplings can be beneficial in certain applications, such as electric motor drives or systems involving sensitive electronics. They help prevent stray currents, ground loops, and electrical interference that could potentially damage equipment or affect the accuracy of electronic signals. However, it is important to note that not all flexible couplings provide this electrical insulation capability, and users should carefully select couplings that meet the specific electrical isolation requirements of their application.
Summary: Flexible couplings, as standard mechanical components, do not inherently provide electrical insulation between shafts. They are primarily used for mechanical power transmission and misalignment compensation. If electrical insulation is needed between rotating shafts, insulated couplings or specialized components with insulating properties should be chosen to meet the specific requirements of the application.
What are the key considerations for selecting a flexible coupling for high-speed applications?
When selecting a flexible coupling for high-speed applications, several critical considerations should be taken into account to ensure optimal performance and reliability:
- Material and Design: Choose a flexible coupling made from high-quality materials that can withstand the high rotational speeds without experiencing excessive wear or fatigue. Consider designs that are specifically engineered for high-speed applications, ensuring they have the required torsional stiffness and damping characteristics.
- Balance: Imbalance at high speeds can lead to vibration and reduce the lifespan of the coupling and connected components. Look for precision-balanced flexible couplings that minimize vibration and avoid any potential resonance issues at operating speeds.
- Torsional Stiffness: In high-speed applications, torsional stiffness is crucial to maintaining accurate rotational timing and preventing torque losses. Choose a flexible coupling with adequate torsional stiffness to minimize angular deflection under load.
- Dynamic Balancing: Dynamic balancing is essential for flexible couplings used in high-speed applications. A dynamically balanced coupling reduces vibrations caused by rotational imbalances, increasing the smoothness and stability of the system.
- Temperature Resistance: High-speed operations can generate significant heat, so select a flexible coupling that can withstand the elevated temperatures without compromising its mechanical properties or causing premature failure.
- Alignment and Runout Tolerance: Accurate alignment of the coupling with the shafts is crucial to prevent additional stress and vibration. Consider couplings with high runout tolerance and ease of alignment to facilitate proper installation.
- Service Life and Maintenance: Evaluate the expected service life of the flexible coupling in high-speed applications. Low-maintenance couplings are desirable to reduce downtime and maintenance costs.
- Application Specifics: Consider the specific requirements of the high-speed application, such as the magnitude of torque, axial movement, and the presence of shock loads. Choose a coupling that can handle these specific demands while maintaining performance at high speeds.
- Compliance with Standards: Ensure that the selected flexible coupling complies with relevant industry standards and specifications, especially those related to high-speed performance and safety.
By carefully considering these key factors, engineers can choose a flexible coupling that meets the demands of high-speed applications, delivering reliable and efficient power transmission while minimizing the risk of premature wear, vibration, and downtime.
Are there any limitations or disadvantages of using flexible couplings?
While flexible couplings offer numerous advantages, they do come with some limitations and disadvantages that should be considered when selecting them for specific applications. Here are some of the common limitations and disadvantages of using flexible couplings:
- Torsional Stiffness: Flexible couplings provide some level of torsional flexibility, which is advantageous in many applications. However, in systems that require high precision and minimal angular deflection, the inherent flexibility of the coupling may not be suitable. In such cases, a rigid coupling may be more appropriate.
- Limitation in High-Torque Applications: While some flexible couplings can handle moderate to high torque levels, they may not be as well-suited for extremely high-torque applications. In such cases, specialized couplings, such as gear couplings, may be required to handle the high torque demands.
- Temperature Limitations: The performance of certain flexible coupling materials, especially elastomers and plastics, may be affected by extreme temperature conditions. High temperatures can lead to premature wear and reduced lifespan of the coupling, while low temperatures may result in reduced flexibility and potential brittleness.
- Chemical Compatibility: Certain flexible coupling materials may not be compatible with certain chemicals or substances present in the application’s environment. Exposure to chemicals can cause degradation or corrosion of the coupling material, affecting its performance and lifespan.
- Installation and Alignment: Flexible couplings require proper installation and alignment to function effectively. If not installed correctly, misalignment issues may persist, leading to premature wear and reduced performance. Aligning the shafts accurately can be time-consuming and may require specialized equipment and expertise.
- Cost: In some cases, flexible couplings may be more expensive than rigid couplings due to their more complex design and use of specialized materials. However, the cost difference is often justified by the benefits they offer in terms of misalignment compensation and vibration damping.
- Service Life: The service life of a flexible coupling can vary depending on the application’s conditions and the quality of the coupling. Regular maintenance and timely replacement of worn or damaged parts are essential to ensure the coupling’s longevity and prevent unexpected failures.
Despite these limitations, flexible couplings remain highly valuable components in a wide range of applications, providing efficient torque transmission and compensating for misalignment. Proper selection, installation, and maintenance can help mitigate many of the disadvantages associated with flexible couplings, ensuring their reliable and long-lasting performance in various mechanical systems.
editor by CX 2024-04-15