DN80~3 tons of ductile iron pipe and 15000 tons pipe fitting The diameter are from 80-2600. We have a owned ductile iron pipe factory and several cooperative iron pipe and fitting factory, So we can meet your big quantity order and supply all diameter size ductile ion pipe and fitting to you in short times. Our goods are only for export and had succeeded exported to Middle East, Africa, Southeast Asia and south American. In gas cylinder valve/gas equipment department.the mainly products are including high and middle pressure oxygen/acetylene/CO2/H2/N2/Ar/Cl/Freon cylinder valve, CGA cylinder valve, CNG/LNG cylinder valve, cryogenic valve pipe shutoff valve and pressure reducer used for all kindly of industries, SCBA cylinder valve and so on. Those products are CHINAMFG in domestic market and exported in many countries. We will ‘Survival by Quality, Development by Credit’ and looking for your inquiry.
FAQ 1. Can I get free samples? A: Yes, we can provide you the free samples, but you need to bear their own delivery costs.
2. Can I request to change the form of packaging and transportation? A: Yes, We can change the form of the packaging and transportation according to your request, but you have to bear their own costs incurred during this period and the spreads.
3. Can I request to advance the shipment? A: It should be depends on whether there is sufficient inventory in our warehouse.
4. Can I have my own Logo on the product? A: Yes, you can send us your drawing and we can make your logo, but you have to bear their own the cost.
5. Can you produce the products according to my own drawings? A: Yes, we can produce the products according to your drawings that will be most satisfy you.
6. What’s your terms of payment? A: T/T, L/C ,full protection for your orders.
7.Do you accept custom design on size? A: Yes, if the size is reasonable
8.Transportation A:Transported by DHL, UPS, EMS, Fedex, SF, by Air, by Sea.
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Durometer Hardness in Rubber Coupling Materials
Durometer hardness is a measure of the material’s resistance to indentation or penetration by a specified indenter. In rubber couplings, durometer hardness is a critical characteristic that influences their performance. It is typically measured using a durometer instrument.
The durometer hardness scale commonly used for rubber materials is the Shore durometer scale, indicated by a letter followed by a numerical value (e.g., Shore A, Shore D). Lower durometer values indicate softer and more flexible rubber, while higher values indicate harder and less flexible rubber.
In relation to rubber couplings:
Higher Durometer (Harder Rubber): Couplings made from harder rubber materials have better torque transmission capabilities and higher load-bearing capacity. However, they may offer less vibration isolation and misalignment compensation.
Lower Durometer (Softer Rubber): Couplings made from softer rubber materials provide greater flexibility, vibration damping, and misalignment compensation. They are suitable for applications where vibration reduction is crucial.
The choice of durometer hardness depends on the specific requirements of the application, including torque levels, vibration, misalignment, and desired performance characteristics.
Comparison of Rubber Couplings with Other Flexible Coupling Types
Rubber couplings, elastomeric couplings, and disc couplings are all flexible coupling options used in various mechanical systems. Here’s a comparison of rubber couplings with these alternatives:
Rubber Couplings:
Transmit torque while damping vibrations through the flexibility of rubber elements.
Provide good misalignment compensation and shock absorption.
Relatively simple construction and cost-effective.
Effective in reducing noise and vibration in applications.
Suitable for moderate to high torque applications with moderate misalignment.
Elastomeric Couplings:
Similar to rubber couplings, utilize elastomeric materials for flexibility and vibration damping.
Offer higher torque capacity and stiffness compared to rubber couplings.
Provide better misalignment compensation and torsional stiffness.
Wider range of sizes and configurations for various applications.
Commonly used in pumps, compressors, and other machinery.
Disc Couplings:
Use a series of metal discs to transmit torque and accommodate misalignment.
Offer high torsional stiffness and accuracy in torque transmission.
Can handle higher speeds and torque compared to rubber or elastomeric couplings.
Require precision in manufacturing and installation.
Used in applications requiring high precision and minimal backlash.
When choosing between these flexible coupling types, considerations such as torque requirements, misalignment compensation, torsional stiffness, and application-specific needs play a significant role in making the appropriate selection. Each type has its advantages and limitations, making it important to assess the specific requirements of the machinery system.
Role of Rubber Flexibility in Accommodating Misalignment
Rubber couplings are designed with a flexible element, usually made of elastomers, that plays a crucial role in accommodating misalignment between connected shafts. The flexibility of the rubber element allows it to deform and absorb angular, axial, and radial misalignments, providing several benefits:
1. Angular Misalignment: When the input and output shafts are not perfectly aligned in terms of angle, the rubber element can flex and twist, allowing the coupling to transmit torque even when the axes are not parallel.
2. Axial Misalignment: Axial misalignment occurs when the shafts move closer together or farther apart along their axis. The rubber element can compress or extend, adjusting the distance between the shafts without hindering torque transfer.
3. Radial Misalignment: Radial misalignment refers to the offset between the centers of the shafts. The rubber element can bend in response to radial displacement, ensuring that the coupling remains operational while accommodating the offset.
This flexibility not only enables the rubber coupling to handle misalignment but also helps prevent excessive stress on the connected machinery. By absorbing shock loads and distributing forces, the rubber element reduces wear and tear on components and minimizes the risk of premature failure.
In essence, the rubber’s flexibility in the coupling acts as a buffer against misalignment-induced stresses, contributing to smoother operation, improved longevity, and reduced maintenance in mechanical systems.
