Product Description

SDSX Grooved Rigid Coupling

System s & Performance

SDSX Grooved mechanical couplings(GMC) are available in both rigid and flexible models.

A rigid coupling is used in applications where a rigid joint is desired,similar to that of a traditional flanged,welded ,or threaded connection.

To be considered rigid,a coupling would allow less than 1 degree of deflection or angular movement

 

Description

SDSX rigid coupling is designed from 1″-12″, and pressure is 300psi/2070 kPa.

Bolts/Nuts: Heat-treated plated carbon steel, meeting its mechanical properties Grade 8.8.

Gaskets: EPDM, silicon rubber and Nitrile rubber.

Dimensions
 

Nominal Size mm/in	Pipe O.D mm/in	Working Pressure PSI/MPa	Bolt Size	Dimensions mm/in
			No.-Size   mm	Ø	L	H
25 1	33.7 1.327	300 2.07	2-3/8*45	60    2.362	102  4.016	45  1.772
32 1¼	42.4 1.669	300 2.07	2-3/8*45	70  2.756	106  4.173	44  1.732
40 1½	48.3 1.900	300 2.07	2-3/8*45	73  2.874	108  4.252	44  1.732
50 2	57.0 2.245	300 2.07	2-3/8*55	83 3.268	122  4.803	45  1.772
50 2	60.3 2.375	300 2.07	2-3/8*55	87 3.425	123  4.843	44  1.732
65 2½	73.0 2.875	300 2.07	2-3/8*55	100  3.937	138  5.433	44  1.732
65 2½	76.1 3.000	300 2.07	2-3/8*55	103  4.055	142  5.591	45  1.772
80 3	88.9 3.500	300 2.07	2- 1/2*60	117  4.606	166  6.535	45  1.772
100 4	108.0 4.250	300 2.07	2- 1/2*65	137  5.393	188  7.401	48  1.889
100 4	114.3 4.500	300 2.07	2- 1/2*65	139  5.472	190  7.480	49  1.929
125 5	133.0 5.250	300 2.07	2- 1/2*75	163  6.417	210  8.268	49  1.929
125 5	139.7 5.500	300 2.07	2- 1/2*75	168  6.614	218  8.583	49  1.929
150 6	159.0 6.250	300 2.07	2- 1/2*75	192  7.559	242  9.528	49  1.929
150 6	165.1 6.500	300 2.07	2- 1/2*75	193  7.598	241  9.488	49  1.929
150 6	168.3 6.625	300 2.07	2- 1/2*75	198.5  7.815	249  9.803	50 1.969
200 8	219.1 8.625	300 2.07	2-5/8*85	253  9.961	320  12.598	59 2.323
250 10	273 10.748	300 2.07	2-7/8*130	335  13.189	426  16.772	68 2.677
300 12	323.9 12.752	300 2.07	2-7/8*130	380  14.96	470  18.504	65 2.559

Material Specification

Housing: Ductile iron conforming to ASTM A-536, grade 65-45-12.

Housing Coating: Paint red and orange

• Optional: Hot dipped galvanized, electro galvanized.

Gaskets

 

• EPDM: Temperature range -34ºC to +150ºC. Recommended for hot water service within

the specified temperature range plus a variety of dilute acids,oil-free air and many chemical services.
 

NOT RECOMMENDED FOR PETROLEUM SERVICES.

 

• Silicon Rubber: Temperature range -40ºC to +177ºC. Recommended for drinking water,

hot water, high-temperature air and some high-temperature chemicals.

NOT RECOMMENDED FOR PETROLEUM SERVICES.

 

• Nitrile Rubber: Temperature range -29ºC to +82ºC. Recommended for petroleum products,

air with oil vapors, vegetable and mineral oils within the specified temperature range.

NOT RECOMMENDED FOR HOT WATER

SERVICES OVER +150°F/+66ºC OR FOR HOT

DRY AIR OVER +140°F/+60ºC.

Installation

Certification

Showroom

Application

Package and shipment

Production and quality control

 

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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.

How does a flexible coupling handle misalignment in large rotating equipment?

Flexible couplings are designed to accommodate various types of misalignment in large rotating equipment, ensuring smooth and efficient power transmission while minimizing stress on connected components. Here’s how flexible couplings handle different types of misalignment:

• Angular Misalignment: Angular misalignment occurs when the axes of the two connected shafts are not collinear and form an angle. Flexible couplings can handle angular misalignment by allowing the coupling elements to flex and move slightly, thus accommodating the angle between the shafts. The flexible elements, often made of elastomeric materials or metallic membranes, can bend and twist to compensate for angular misalignment, ensuring that the coupling remains engaged and transfers torque effectively.
• Parallel Misalignment: Parallel misalignment, also known as offset misalignment, happens when the two shafts are not perfectly aligned along their axes, resulting in a lateral shift. Flexible couplings can handle parallel misalignment through their ability to move radially, allowing the flexible elements to adjust and take up the offset. This capability prevents excessive side loads on the shafts and bearings, reducing wear and increasing the lifespan of the equipment.
• Axial Misalignment: Axial misalignment occurs when there is a linear displacement of one shaft relative to the other, either toward or away from the other shaft. Some flexible couplings, such as certain types of flexible disc couplings, can accommodate a limited amount of axial misalignment. However, for large axial movement, other types of couplings or special designs may be required.

The flexibility of the coupling elements allows them to act as a buffer between the shafts, dampening shocks, vibrations, and torsional forces caused by misalignment or other dynamic loads. This helps protect the connected equipment from damage and enhances the overall performance and reliability of the rotating system.

In large rotating equipment, where misalignment is more common due to thermal expansion, foundation settling, or other factors, flexible couplings play a critical role in maintaining smooth operation and reducing stress on the machinery. However, it is essential to choose the appropriate type of flexible coupling based on the specific requirements of the application and to regularly inspect and maintain the coupling to ensure optimal performance and longevity.

Can flexible couplings accommodate high torque and high-speed applications?

Yes, flexible couplings can accommodate both high torque and high-speed applications, but the suitability depends on the specific design and material of the flexible coupling. Different types of flexible couplings have varying torque and speed capacities, and it’s crucial to select the right type of coupling based on the application requirements.

High Torque Applications:

Some flexible couplings, such as gear couplings and disc couplings, are designed to handle high torque levels. Gear couplings consist of toothed hubs that mesh with each other, providing a robust and efficient torque transmission. They are commonly used in heavy-duty industrial applications, such as steel mills, mining equipment, and power generation plants, where high torque loads are prevalent.

Disc couplings are also suitable for high torque applications. They use a series of flexible metal discs that can handle significant torque while compensating for misalignment. Disc couplings are often used in high-speed machinery and critical applications where precise torque transmission is essential.

High-Speed Applications:

Flexible couplings can also be used in high-speed applications. For instance, certain disc couplings, elastomeric couplings, and grid couplings are capable of handling high rotational speeds. These couplings have low inertia, which means they can respond quickly to changes in speed and provide efficient power transmission at high RPMs.

Elastomeric couplings, such as jaw couplings and tire couplings, are commonly used in various industrial applications, including pumps, compressors, and fans, where both torque and speed requirements are high. They offer good flexibility and damping properties, making them suitable for applications with high-speed variations and vibrations.

Considerations:

When selecting a flexible coupling for high torque and high-speed applications, several factors should be considered:

• The torque and speed ratings provided by the coupling manufacturer should be checked to ensure they meet or exceed the application’s requirements.
• The design and materials of the coupling should be suitable for the specific operating conditions, including temperature, environment, and potential exposure to corrosive substances.
• Proper alignment and installation of the coupling are critical to ensure optimal performance and prevent premature wear.
• In some cases, it may be necessary to use additional components, such as torque limiters or speed reducers, to protect the coupling and the connected equipment from excessive loads or speed fluctuations.

In conclusion, flexible couplings can indeed accommodate high torque and high-speed applications, but the appropriate coupling type and proper selection are essential to ensure reliable and efficient performance in these demanding conditions.

editor by CX 2024-02-29