Product Description
Product Description
Steel flexible joint is also called clamp, open expansion joint, steel flexible pipe joint. Steel flexible joint is a kind of pipe connection, reliable performance, easy to install products. At low pressure, by the elastic deformation of the sealing ring, to achieve the purpose of sealing; When the pressure increases, the medium acts on the sealing ring to play the role of self-sealing, and there is a gap between the pipe ends to compensate for the displacement and deflection of the pipe caused by thermal expansion and cold contraction.
The working temperature of the clamp joint is generally -30ºC-+130ºC. The medium property is weak acid, weak alkali and lubricating oil range can be applied. If beyond the above range can also provide our company with the nature of the medium parameters or optional parameters or optional specified rubber ring material. In addition to the connection function, the joint can also provide compensation, withstand axial force, provide Angle, reduce vibration wave, adapt to the change of foundation.
The advantages of clamp joint:
1 Clamp joint has good continuity, will not produce distortion, easy to achieve the ideal laying state.
2 Clamp pipe joint in a free state, do not bear the weight of the pipe, not subjected to external shear, especially DN200 pipe diameter, more must consider the weight of the pipe.
3. It is easy to keep the coaxial position when installing the clamp joint to ensure the uneven distribution of the radial clearance between the inner diameter of the pipe clamp and the outer diameter of the pipe. The rubber ring will be deformed under high pressure due to the large local clearance, which will affect the sealing effect and even destroy the rubber ring.
4. It is suitable for the application in the subsidence zone, which can reduce the Angle between the pipe segments caused by the subsidence of the support pier.
5 is conducive to pipeline maintenance. Turn the pipe, save labor and effort when changing the pipe.
Detailed Photos
Product Parameters
PN1.6/2.5/4.0/6.4MPa KRHD
| DN(mm) | Dw(mm) | Allowable Angle Φ |
Installation length L (mm) |
Maximal length (mm) |
Fitting bolt d×L (mm) |
| 80 | 89 | 17.90 | 100 | 110 | M12*60 |
| 100 | 108 | 15.06 | 100 | 110 | M14*60 |
| 125 | 133 | 13.05 | 105 | 115 | M14*60 |
| 150 | 159 | 12.09 | 110 | 120 | M14*60 |
| 175 | 194 | 10.51 | 110 | 120 | M16*60 |
| 200 | 219 | 9.33 | 116 | 126 | M16*75 |
| 225 | 245 | 8.36 | 122 | 132 | M16*80 |
| 250 | 273 | 7.51 | 127 | 137 | M18*90 |
| 300 | 325 | 6.32 | 130 | 140 | M18*100 |
| 350 | 377 | 5.45 | 135 | 145 | M18*100 |
| 400 | 426 | 4.80 | 140 | 150 | M18*110 |
| 450 | 480 | 4.28 | 145 | 155 | M18*110 |
| 500 | 530 | 3.88 | 150 | 160 | M18*120 |
| 600 | 630 | 3.27 | 155 | 165 | M18*120 |
| 700 | 720 | 2.86 | 160 | 170 | M20*120 |
| 800 | 820 | 2.51 | 165 | 175 | M20*130 |
| 900 | 920 | 2.24 | 170 | 180 | M20*130 |
| 1000 | 1571 | 2.02 | 175 | 185 | M20*130 |
| 1200 | 1220 | 1.69 | 180 | 190 | M22*140 |
| 1400 | 1420 | 1.45 | 185 | 195 | M22*140 |
| 1600 | 1620 | 1.27 | 190 | 200 | M22*140 |
| 1800 | 1820 | 1.13 | 195 | 205 | M22*150 |
| 2000 | 2571 | 1.01 | 200 | 210 | M24*150 |
| 2200 | 2571 | 1.01 | 205 | 215 | M24*150 |
| 2400 | 2420 | 1.01 | 210 | 220 | M24*150 |
| 2600 | 2620 | 1.01 | 215 | 225 | M24*160 |
| 2800 | 2830 | 1.01 | 220 | 230 | M27*160 |
| 3000 | 3571 | 1.01 | 225 | 230 | M27*160 |
| 3200 | 3220 | 1.01 | 230 | 240 | M27*180 |
Datas above are only for reference,if you want to know more details, please click here to contact us.
Installation Instructions
1. Prepare groove pipe sections, fittings and accessories that meet the requirements.
2. Check whether the rubber sealing ring is damaged and put it on the end of a steel pipe.
3. There should be a certain gap between the end and both ends of the steel pipe close to the end and both ends of the pipe which has been covered with rubber sealing ring. The clearance shall meet the standard requirements.
4. Put the rubber seal ring on the end of another steel pipe, make the rubber seal ring in the middle of the interface, and apply lubricant on the same side.
5. Check the axis of the pipe.
6. Install upper and lower clamps on the outer side of rubber seal-ing ring at the interface position, and clip the collar convex edge into the groove.
7. Press the upper and lower clamp ears with hand force, tighten the collar of the clamp with a wooden hammer, and tighten the upper and lower clamps tightly.
8. At the clamp screw hole position, put on the studs and tighten the nuts evenly to prevent the rubber sealing ring from wrin-kling.
9. check and comfirm that the collar convex edge is clamped into the groove.
products application
Company Profile
HangZhou Ruixuan pipeline equipment factory was founded in 1996.It is an excellent enterprise specializing in manufacturing and selling pipe fittings.It’s located in Xicun village ,HangZhou city,ZheJiang province ,the concentrated area of pipeline equipment industry in China.The company factory is located in Xicun town pipeline equipment industrial park.It covered an area of20000 square meters.
At present, the company has the production capacity of pipeline equipment with a maximum diameter of 4000mm, and its main products are: Steel expansion joint, flexible waterproof sleeve, large diameter flange, double flange force transfer expansion joint, large deflection loose sleeve compensation joint, spherical compensation joint, sleeve compensator, bellows compensator, non-metallic compensator, rubber expansion joint, DC medium no thrust sleeve compensator, flexible expansion pipe and other pipeline equipment. The annual production capacity is 30 million sets.
The flexible telescopic pipe equipment is mainly used in the pipeline crossing different geological structures under different conditions and the application of pipe installation drop, reduce or avoid the impact of geological settlement and crustal activity on the pipeline, so that the construction unit can save more than 50% of the cost when purchasing the equipment. The rubber expansion joint series products of the company, the maximum production diameter of 3600mm, have been applied in millions of units of thermal power projects in China for many times, and have been praised by the users.
The company passed ISO9001:2008 quality management system certification in 2009 and ISO14000:2004 environmental management system certification in 2009. The company has a strict quality control system, standard production process, standard factory inspection hand section, to ensure that every product meets the national standards and customer requirements.
Business philosophy: responsible production of products, return the trust of customers; To build a community with a sense of belonging and appreciate employees’ contributions; Make a contribution to the society of enterprises, give back to the good times. HangZhou Ruixuan pipeline equipment factory is willing to work with friends from all walks of life hand in hand, mutual support, create a better future!
Certifications
FAQ
Q:Can you make the product as per client’s requirement?
A:Yes, we can make it with your exact requirement.
Q:What are your payment terms?
A:T/T (30% as deposit, the rest 70% will be paid before delivery), L/C at sight.
Q:Where is your nearest loading port?
A:ZheJiang , HangZhou or ZheJiang , China.
Q:How can you guarantee the quality or any warranty?
A:If any quality problems during use, all the products can be returned or according to consumer’s requests.
Q:Do you accept small quantity order?
A:Of course we do.
Q:And what is your shipment and delivery time?
A:By sea or air. Normally 7 to 14 Days for delivery, according to your order quantity.
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Differences between Elastomer and Metallic Jaw Coupling Designs
Jaw couplings are available in two primary designs: elastomer jaw couplings and metallic jaw couplings. Each design has its own set of characteristics and advantages:
- Elastomer Jaw Couplings: Elastomer jaw couplings, also known as flexible jaw couplings, feature an elastomeric spider element that sits between the two hubs. This spider element is typically made of materials like polyurethane, rubber, or other flexible polymers. The elastomeric material provides the coupling with flexibility, allowing it to compensate for shaft misalignment, angular, parallel, and axial, as well as dampen vibrations and shocks. Elastomer jaw couplings are popular for their ability to protect connected equipment from mechanical stresses and enhance overall system performance. They are commonly used in applications where some misalignment is expected or in systems with shock loads and vibrations. Additionally, elastomer jaw couplings are known for their relatively lower cost compared to metallic designs.
- Metallic Jaw Couplings: Metallic jaw couplings, also known as rigid jaw couplings, are constructed entirely from metal, usually steel or aluminum. Unlike elastomer couplings, metallic jaw couplings do not have an elastomeric spider element and offer a more rigid connection between the two hubs. As a result, they are less forgiving of misalignment and do not provide the same level of vibration dampening as elastomer couplings. However, metallic jaw couplings offer higher torque capacity and are better suited for applications where precise shaft alignment is critical. They are commonly used in systems that require high torque transmission and minimal torsional flexibility. Additionally, metallic jaw couplings are well-suited for environments with high temperatures or exposure to chemicals, as they can withstand harsher conditions compared to elastomer designs.
The choice between elastomer and metallic jaw couplings depends on the specific requirements of the application. If flexibility, misalignment compensation, and vibration dampening are crucial, elastomer jaw couplings are preferred. On the other hand, when high torque transmission, precise alignment, and durability in challenging environments are needed, metallic jaw couplings are the better option.
How does a jaw coupling deal with backlash and torsional stiffness?
A jaw coupling addresses backlash and torsional stiffness through its unique design features and choice of materials. Backlash is the amount of free play or clearance between the coupling components, while torsional stiffness refers to the resistance of the coupling to torsional or twisting forces. Here’s how a jaw coupling deals with these aspects:
- Backlash: Jaw couplings are designed to minimize backlash by ensuring a close fit between the elastomer spider and the jaws of the coupling hubs. The elastomer spider acts as a flexible intermediary that fills the space between the mating jaws, reducing any free play between them. This close fit reduces backlash and provides a more precise and responsive power transmission, especially in reversing or intermittent motion applications.
- Torsional Stiffness: Torsional stiffness is achieved in jaw couplings by using materials that provide a balance between flexibility and rigidity. The elastomer spider in the coupling offers some flexibility, allowing it to absorb vibrations and dampen shocks. However, to ensure adequate torsional stiffness, the coupling hubs are usually made from sturdier materials like steel or aluminum. The choice of elastomer material and its geometry also influences the torsional stiffness of the coupling. Some applications may require coupling designs with higher torsional stiffness to maintain the accuracy and stability of the system, while others may benefit from more flexible couplings that can accommodate misalignments and shock loads. Overall, the combination of the elastomer’s flexibility and the coupling hub’s rigidity results in a coupling with a balanced torsional stiffness that can meet the specific needs of the application.
In summary, a jaw coupling minimizes backlash by providing a close fit between the coupling components, and it achieves torsional stiffness by using a combination of flexible elastomer materials and rigid coupling hubs. These design considerations make jaw couplings suitable for a wide range of applications that require reliable power transmission, precise motion control, and the ability to handle misalignments and shocks.
Maintenance Requirements for Jaw Couplings
Jaw couplings are relatively low-maintenance components, but regular inspections and preventive measures can help ensure their optimal performance and longevity. Here are the maintenance requirements for jaw couplings:
- Visual Inspections: Regularly inspect the jaw coupling for signs of wear, damage, or misalignment. Look for cracks, chips, or deformation in the elastomeric spider, hubs, and other components.
- Lubrication: Some jaw couplings require periodic lubrication of the elastomeric spider to prevent dry rot and ensure flexibility. Refer to the manufacturer’s guidelines for the appropriate lubrication schedule and type.
- Tighten Fasteners: Check and tighten all fasteners, including set screws, regularly to prevent coupling slippage and maintain a secure connection between the shafts and hubs.
- Alignment: Ensure that the shafts connected by the jaw coupling are properly aligned. Excessive misalignment can lead to premature wear and failure of the elastomeric spider.
- Replace Worn Parts: If any component of the jaw coupling shows signs of wear beyond acceptable limits, promptly replace it to avoid further damage and potential system failure.
- Operating Conditions: Monitor the operating conditions of the machinery to prevent overheating or overloading, which can affect the performance and life of the coupling.
Following these maintenance practices can extend the life of the jaw coupling, reduce the risk of unexpected failures, and contribute to the overall reliability of the mechanical system.
editor by CX 2023-12-21