Product Description

Product information

rubber coupling GR28 on 20hp compressor 65*30*H19

Quick Details
Place of Origin:
ZheJiang , China (Mainland)
Brand Name:
Screw Air Compressor
neutral packing
1 Year
Delivery Time:
1-3 working days after received your payment
GR24//38/42/65/75 Rubber Coupling
Supply Ability
Supply Ability:
10000 Piece/Pieces per Month
Packaging & Delivery
Packaging Details
Package each product with blank packing for Rubber coupling 
Delivery Time 
1-3 working days after received your payment for Rubber coupling
HangZhou,hongkong port

They have excellent vibration dampening capability and high-misalignment capacity, providing extended life to connected equipment. The couplings offer a replace-in-place design for quick installation and replacement.
Feature •
Avoiding impulsive load, high efficient driving and reliable operation • Install or remove the element radially and eady of maintenance for shaft seal
Procedure of flexible coupling
Claw type surface to surface design, has the function of protecting, vibration and shock can produce effective damping and reduce the running in process. Claw type teeth 2 sleeve are offset in the circumferential direction, in the gap in a quincunx elastic body of involute. When small deviations in the installation, the elastic body avoids the stress concentration. Can effectively compensate the axial, radial and angular displacement. Column pin coupling elastomer old-fashioned type of large volume, shear effect, easy to damage, while the elastic body new claw type couplings only under the extrusion pressure, so it can withstand greater load, better wear resistance, longer service life. And both the level of installation, and can be installed vertical.
Characteristics of coupling products:
1, Has the advantages of simple structure, stable performance, stable operation
2, Three component structure, easy installation and maintenance.
3, Hub and elastic body, a variety of materials to choose from, to ensure that all can work stably in various environments.
4, Using a surface matching claw type shaft hub and involute arc elasticity, can avoid the stress concentration, the effective transmission of higher torque, more resistant to abrasion, longer service life. A small protuberance pad 5 elastic body, can isolate the metal shaft hub contact in coupling installed, effective insulation, no need of lubrication. Coupling of deviation of the remedy is deformation occurs through the elastic force at the finish.
1, We can provide OEM service of het exchangers totally according to customers’requirement.
2, We can print logo according to buyers’ requirement.
3, We have been qualified by ISO9001:2000 since 2004. 4
, We has exported to many countries, such as Korea, USA, etc.


screw air compressor flexible coupling 
with high quality and low price 


Businesss scope


                             Business scope
Mechanical Seal :
Temperature Sensor Pressure Sensor
Maintenance Kits Solenoid Valve Thermostatic Valve
Air intake Wheel Gear
Pressure Maintaining   Valve
Air Filter Oil Separator Oil Filter
Oil Level Indicator Circuit Board Master Control Air intake valve
Used air compressor Air-end Oil level indicator



Additional information


No Model Gas displacement m3/min Power(kw)
 7.5bar  8.5/8bar 10bar 13bar
1 GA5P FM 0.9 0.8 0.7 0.5 5
2 GA7P FM 1.2 1.1 1 0.8 7
3 GA11P FM 1.7 1.6 1.5 1.2 11
4 GXe15P FM 2.58 2.36 2.18 1.81 15
5 GXe18P FM 3.15 3.01 2.61 2.23 18
6 GXe22P FM 3.61 3.5 3.1 2.7 22
7 GAe11P 2 1.9 1.6 1.2 11
8 GAe15P 2.7 2.5 2.3 1.9 15
9 GAe18P 3.3 3.1 2.7 2.3 18
10 GAe22P 3.8 3.7 3.3 2.8 22
11 GAe26P 4.3 4 3.7 3.1 26
12 GAe30P 4.8 4.5 4.3 3.7 30
13 GA11+P 2.1 2 1.8 1.5 11
14 GA15+P 2.8 2.6 2.4 2 15
15 GA18+P 3.5 3.3 2.9 2.5 18
16 GA22+P 4.1 3.9 3.5 3 22
17 GA26+P 4.8 4.6 4.2 3.6 26
18 GA30P 5.4 5.2 4.8 4.1 30
19 GA30+AP 6.1 6.0(8bar) 4.8 3.9 30
20 GA37AP 6.4 6.3(8bar) 5.6 4.5 37
21 GA37+AP 7.1 6.9(8bar) 5.9 4.9 37
22 GA45AP 7.7 7.3(8bar) 6.5 5.5 45
23 GA45+AP 8.6 8.0(8bar) 7.3 6.1 45
24 GA55AP 10 9.3(8bar) 8.6 7.4 55
25 GA55+(A/W)P 10.6 10.1(8bar) 8.7 ~~~ 55
26 GA75AP 13.1 12.3(8bar) 11 9.7 75
27 GA75+(A/W)P 14.7 13.8(8bar) 12.2 10.2 75
28 GA90(A/W)P 16.2 15.6(8bar) 14.1 12 90
Table 2            
No Model Gas displacement m3/min Power(kw)
 7.5bar  8.5bar 10bar 14bar
1 GA90-(W) 16.8 15.8 14.4 11.1 90
2 GA110(W) 20 18.8 17 13.9 110
3 GA132(W) 24.1 22.9 21 16.8 132
4 GA160(W) 30.4 28.9 26.8 21.7 160
No Model Gas displacement m3/min Power(kw)
 7.5bar  8.5bar 10bar 13bar
5 GA200(W) 36.1 34 30.7 26.1 200
6 GA250(W) 43.7 41.7 37.8 31.7 250
7 GA315(W) 55 52 48   315
8 GA355(W) 60 57 53 46 355

1. What’s Minimum Order Quantity of your air compressor part?

the MOQ is 1pc, need you pay for the delivery cost.

2. What’s kind of your packaging for the air compressor part?
neutral packing or brand pack as your requirement

3. Could I get some samples? How could i pay the sample payment?
yes, we can provide sample, but not free.
payment: paypal, westunion ,TT

4. How long is your Delivery Lead Time ?   
If there is stock, the lead time is about 2 WORKING DAYS after we get the payment, if need to be produced, it depens.

5. Could you Calculate the shipping cost for me?
Yes, we are honored to do that for you! Before the freight , please well let us know which seaport or airport near your place.
6. what’s the delivery way?
shipping way: air freight, express, sea


flexible coupling

Can flexible couplings be used in hydraulic and pneumatic systems?

Yes, flexible couplings can be used in both hydraulic and pneumatic systems to connect various components and transmit power or motion. However, the selection of flexible couplings for these systems depends on specific application requirements and operating conditions.

Hydraulic Systems:

  • Compensating Misalignment: In hydraulic systems, flexible couplings are used to compensate for misalignment between the driving and driven components, such as pumps, motors, and actuators. Misalignment can occur due to variations in the mounting or movement of components. The flexibility of the coupling allows it to accommodate misalignment while transmitting torque efficiently.
  • Vibration Damping: Hydraulic systems can generate vibrations during operation, which can affect the performance and lifespan of connected components. Flexible couplings with vibration-damping properties help reduce the transmission of vibrations, providing smoother operation and minimizing wear on components.
  • Reducing Shock Loads: Flexible couplings absorb and dampen shock loads that may occur in hydraulic systems during rapid starts, stops, or pressure fluctuations. By absorbing these shock loads, the coupling protects connected components from potential damage.
  • Corrosion Resistance: Hydraulic systems may operate in environments with exposure to hydraulic fluids, which can be corrosive. Flexible couplings made of materials resistant to corrosion, such as stainless steel or specific polymers, are suitable for such applications.
  • High Torque Transmission: Hydraulic systems often require high torque transmission between the power source and the driven components. Flexible couplings can handle high torque levels while accommodating angular and axial misalignments.

Pneumatic Systems:

  • Compensation for Misalignment: In pneumatic systems, flexible couplings provide compensation for misalignment between components, such as pneumatic cylinders, valves, and rotary actuators. The ability to accommodate misalignment ensures smooth operation and reduces the risk of mechanical stress on the system.
  • Minimal Lubrication: Some flexible couplings designed for pneumatic systems require little to no lubrication, making them suitable for applications where oil or grease contamination is undesirable.
  • Low Inertia: Pneumatic systems often require components with low inertia to achieve rapid response times. Flexible couplings with low mass and low inertia help maintain the system’s responsiveness and efficiency.
  • High Torque Transmission: Pneumatic systems can demand high torque transmission between components, such as in pneumatic rotary actuators. Flexible couplings can transmit torque effectively while compensating for potential misalignments.
  • Corrosion Resistance: Pneumatic systems operating in harsh environments may be exposed to moisture or chemicals. Flexible couplings made of corrosion-resistant materials are ideal for such conditions.

Overall, flexible couplings are versatile components that can be used in a wide range of hydraulic and pneumatic applications. When selecting a flexible coupling for a specific system, it’s essential to consider factors such as misalignment compensation, vibration damping, shock absorption, corrosion resistance, torque transmission capability, and compatibility with the system’s operating conditions.

flexible coupling

What are the differences between single and double flexible coupling designs?

Single and double flexible couplings are two common designs used for power transmission in various mechanical systems. Here are the main differences between the two:

  • Design: The primary difference lies in their configuration. A single flexible coupling consists of one flexible element connecting two shafts, while a double flexible coupling, also known as a two-piece flexible coupling, uses two flexible elements with an intermediate shaft in between. The double flexible coupling resembles two single couplings connected in series.
  • Torsional Flexibility: Single flexible couplings typically provide greater torsional flexibility than double flexible couplings. The presence of an intermediate shaft in the double coupling design adds some rigidity and reduces the overall torsional flexibility of the system.
  • Compensation of Misalignment: Both single and double flexible couplings can compensate for angular and parallel misalignment between shafts. However, due to its additional flexible element, the double flexible coupling may have slightly better misalignment compensation capabilities.
  • Length and Space: Single flexible couplings are generally shorter in length compared to double flexible couplings. The double flexible coupling’s design requires additional space to accommodate the intermediate shaft, making it longer than the single coupling.
  • Shaft Separation: Single flexible couplings connect the two shafts directly without any intermediate components, while the double flexible coupling separates the shafts using an intermediate shaft. This shaft separation in the double design can be advantageous in certain applications.
  • Stiffness: The double flexible coupling tends to be slightly stiffer than the single flexible coupling due to the presence of the intermediate shaft, which may affect its ability to absorb vibrations and shock loads.
  • Application: Single flexible couplings are commonly used in various applications, including pumps, compressors, fans, and general power transmission systems. Double flexible couplings are often preferred in applications where a higher level of torsional stiffness is required, such as certain industrial machinery.

Both single and double flexible coupling designs have their advantages and are suitable for different types of machinery and power transmission requirements. The choice between the two depends on factors such as the specific application, the level of misalignment compensation needed, the available space, and the desired torsional flexibility for the system.

flexible coupling

What are the maintenance requirements for flexible couplings?

Maintenance of flexible couplings is essential to ensure their reliable and efficient performance over their service life. Proper maintenance helps prevent premature wear, reduces the risk of unexpected failures, and extends the lifespan of the couplings. Here are some key maintenance requirements for flexible couplings:

  • Regular Inspection: Perform regular visual inspections of the flexible couplings to check for signs of wear, damage, or misalignment. Look for cracks, tears, or any other visible issues in the coupling components.
  • Lubrication: Some flexible couplings, especially those with moving parts or sliding surfaces, may require periodic lubrication. Follow the manufacturer’s recommendations regarding the type and frequency of lubrication to ensure smooth operation.
  • Alignment Checks: Misalignment is a common cause of coupling failure. Regularly check the alignment of the connected shafts and adjust as necessary. Proper alignment reduces stress on the coupling and improves power transmission efficiency.
  • Torque Monitoring: Monitoring the torque transmitted through the coupling can help detect any abnormal or excessive loads. If the coupling is subjected to loads beyond its rated capacity, it may lead to premature failure.
  • Environmental Protection: If the couplings are exposed to harsh environmental conditions, take measures to protect them from dust, dirt, moisture, and corrosive substances. Consider using protective covers or seals to shield the couplings from potential contaminants.
  • Temperature Considerations: Ensure that the operating temperature of the flexible coupling is within its designed range. Excessive heat can accelerate wear, while extremely low temperatures may affect the flexibility of certain coupling materials.
  • Replace Worn or Damaged Parts: If any components of the flexible coupling show signs of wear or damage, replace them promptly with genuine replacement parts from the manufacturer.
  • Manufacturer’s Guidelines: Follow the maintenance guidelines provided by the coupling manufacturer. They often include specific maintenance intervals and procedures tailored to the coupling’s design and materials.
  • Training and Expertise: Ensure that maintenance personnel have the necessary training and expertise to inspect and maintain the flexible couplings properly. Improper maintenance practices can lead to further issues and compromise the coupling’s performance.

By adhering to these maintenance requirements, you can maximize the service life of the flexible couplings and minimize the risk of unexpected downtime or costly repairs. Regular maintenance helps maintain the efficiency and reliability of the coupling in various industrial, automotive, and machinery applications.

China Hot selling Screw Air Compressor Parts Rubber Flexible Coupling Gr28  China Hot selling Screw Air Compressor Parts Rubber Flexible Coupling Gr28
editor by CX 2023-10-07