China supplier CHINAMFG Quick Coupling Straub Coupling for Flexible Pipe Connection

Product Description

Restraint Stainless Steel Straub Pipe Coupling 

  
1. Product Introduction :

GREAT WALL Straub Flex Type Coupling is used to join all pipe materials including Metal, Plastic, Concrete and etc. 
Our Straub Couplings are specific designed for handling pipe msalignments and vibrations, and extensively used in shipbuilding, wastewater treatment and construction .
These flexible and lightweight Couplings come fully assembled and can be installed without using any special tools .
Our Stainless Steel Flexible Coupling can be used to join pipes of different material such as steel, galvanised, stainless steel, PVC and copper pipes 

2. Proudct Features :

*   body, bolt, nuts made of stainless steel 
*   flexible pipe connection 
*   allow angular deflection but don't provide restraint 
*   anticorrosive
*   easy installation and disassembly 
*   free of welding and fire risk 

3.  Dimension Sheet : 

3.1  Single-Section Stainless Steel Repair Coupling

 

S/N	O. D Range	Working Pressure	Clamp Length (mm)		Size D	Size H	Bolt	Bolt Torque
	mm	bar	Normal(L1)	Extended(L2)	mm	mm	mm	Nm
1	17-19	32	57		35	55	M6	10
2	21-23	32	57		45	65	M6	10
3	24.5-25.5	32	57		50	70	M6	10
4	26-28	32	57		50	70	M6	10
5	31.5-32.5	32	57		55	75	M6	10
6	33-35	32	57		55	75	M6	10
7	39.5-41.5	32	57		55	75	M6	10
8	42-44	32	57	100	65	85	M6	15
9	44-45	32	57	100	66	86	M6	15
10	47-49	32	57	100	70	90	M6	15
11	53.6-54.6	32	57	100	70	90	M8	30
12	56.3-57.7	32	57	100	80	100	M8	30
13	59-62	32	80	139	85	105	M8	30
14	62-64	32	80	139	85	105	M8	30
15	75-78	28	80	139	100	120	M8	30
16	79-81	28	80	139	100	120	M8	30
17	88-92	28	107	203	110	130	M10	50
18	106-110	28	107	203	130	150	M10	50
19	109-111	28	107	203	130	150	M10	50
20	112-116	28	107	203	135	155	M10	50
21	116-119	28	107	203	140	160	M10	50
22	123-126	28	107	203	150	185	M10	50
23	131-134	28	107	203	160	190	M10	50
24	137-143	28	116	203	165	195	M12	80
25	157-161	24	116	203	185	215	M12	80
26	163-167	24	116	203	190	215	M12	80
27	166-170	24	116	203	195	225	M12	80
28	168-172	24	116	203	195	225	M12	80
29	198-201	16	155	255	240	270	M14	100
30	217-221	16	155	255	250	280	M14	100
31	250-254	16	155	255	285	315	M14	100
32	271-275	16	155	255	305	335	M14	100
33	313-317	14	155	255	340	375	M14	100
34	323-327	14	155	255	355	385	M14	100
35	354-358	14	155	255	385	420	M14	100
36	375-379	14	155	255	410	440	M14	100

3.2  Double-Section Stainless Steel Repair Coupling

S/N	O. D Range	Ship	Industry	Length (mm)		Dimension		Screw	Torque
	mm	PN (bar)	WP (bar)	Normal(L1)	Extended(L2)	D(mm)	H(mm)	mm	Nm
1	21-23	16	32	57		35	50	M6	15
2	24.5-25.5	16	32	57		50	70	M6	15
3	26-28	16	32	57		50	70	M6	15
4	31.5-32.5	16	32	57		55	75	M6	15
5	33-35	16	32	57		55	75	M6	15
6	40-42	16	32	57		55	75	M6	15
7	42-44	16	32	57		65	85	M6	15
8	44-45	16	32	57		65	85	M6	15
9	47-49	16	32	57	100	70	90	M6	15
10	53.3-54.6	16	32	57	100	70	90	M8	30
11	56.3-57.7	16	32	57	100	80	100	M8	30
12	59-62	16	32	80	139	85	105	M8	30
13	62-64	16	32	80	139	85	105	M8	30
14	75-78	14	28	80	139	100	120	M8	30
15	79-81	14	28	80	203	100	120	M8	30
16	88-92	14	28	107	203	110	130	M10	50
17	106-110	14	28	107	203	130	150	M10	50
18	109-111	14	28	107	203	130	150	M10	50
19	112-116	14	28	107	203	135	155	M10	50
20	116-119	14	28	107	203	140	160	M10	50
21	123-126	14	28	107	203	150	185	M10	50
22	131-134	14	28	107	203	160	190	M10	50
23	137-143	14	28	116	203	165	195	M12	80
24	157-161	12	24	116	203	185	215	M12	80
25	163-167	12	24	116	203	190	215	M12	80
26	166-170	12	24	116	203	195	225	M12	80
27	168-172	12	24	116	203	195	225	M12	80
28	198-201	8	16	155	255	240	270	M14	100
29	217-221	8	16	155	255	250	280	M14	100
30	250-254	8	16	155	255	285	315	M14	100
31	271-275	8	16	155	255	305	335	M14	100
32	313-317	7	14	155	255	340	375	M14	100
33	323-327	7	14	155	255	360	390	M14	100
34	354-358	7	14	155	255	385	420	M14	100
35	375-379	7	14	155	255	410	440	M14	100

4. Rubber Sealing Material 
 

Rubber Sealing Sleeve Material Chart
Material	Suit for
EPDM	Temperature Range : -20ºC to +120ºC                                                Suit for water, waster water, air, CHINAMFG and chemicals fluids
NBR	Temperature Range : -20ºC to +120ºC                                                Suit for gas,oil, crude oil and other hydrocarbon fluids
MVQ(Silicon Rubber)	Temperatuer Range: -75ºC to +200ºC                                          Sunlight resistant, heat resistant, high temperature isolation
VITON( Fluoro Rubber)	Temperature Range: -95ºC to +300ºC                                              Heat resistant, chemical attack resistant

Note: you should choose the kind of rubber material based on the type of fluids of your pipeline .

5. Company Profile :

6. Certificate :

7. Project Cases :

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Can flexible couplings be used in precision motion control systems?

Yes, flexible couplings can be used in precision motion control systems, but careful consideration must be given to their selection and application. Precision motion control systems require high accuracy, repeatability, and minimal backlash. Flexible couplings can play a crucial role in such systems when chosen appropriately and used in the right conditions.

Selection Criteria: When selecting a flexible coupling for a precision motion control system, several key factors should be considered:

• Backlash: Look for couplings with minimal or no backlash to ensure accurate motion transmission and precise positioning.
• Torsional Stiffness: Choose a coupling with sufficient torsional stiffness to minimize torsional deflection and maintain accurate motion control.
• Misalignment Compensation: Ensure the coupling can accommodate the required misalignment without introducing significant variations in motion accuracy.
• Dynamic Performance: Evaluate the coupling's dynamic behavior under varying speeds and loads to ensure smooth and precise motion control during operation.
• Material and Construction: Consider the material and construction of the coupling to ensure it can withstand the specific environmental conditions and loads of the motion control system.
• Size and Space Constraints: Choose a compact and lightweight coupling that fits within the available space and does not add excessive inertia to the system.

Applications: Flexible couplings are commonly used in precision motion control systems, such as robotics, CNC machines, semiconductor manufacturing equipment, optical systems, and high-precision measurement instruments. They help transmit motion from motors to various components, such as lead screws, spindles, or precision gears, while compensating for misalignments and providing shock and vibration absorption.

Specialized Couplings: For ultra-high precision applications, specialized couplings, such as zero-backlash or torsionally rigid couplings, may be preferred. These couplings are designed to provide precise motion transmission without any play or torsional deflection, making them suitable for demanding motion control tasks.

Installation and Alignment: Proper installation and alignment are critical to achieving optimal performance in precision motion control systems. Precise alignment of the coupling and connected components helps maintain accurate motion transmission and minimizes eccentricities that could impact the system's precision.

Summary: Flexible couplings can indeed be used in precision motion control systems when chosen and applied correctly. By considering factors like backlash, torsional stiffness, misalignment compensation, and dynamic performance, users can select the right coupling to ensure high accuracy, repeatability, and reliable motion control in their specific application.

Can flexible couplings be used in precision manufacturing equipment, such as CNC machines?

Yes, flexible couplings can be used in precision manufacturing equipment, including CNC (Computer Numerical Control) machines. CNC machines require high accuracy and precision during operation to produce complex and intricate parts. Flexible couplings play a vital role in such equipment by providing various benefits that enhance their performance and reliability.

• Compensation for Misalignment: CNC machines often have multiple moving parts and axes that need precise alignment. Flexible couplings can accommodate small misalignments between these components, ensuring smooth and reliable power transmission without inducing additional stress or strain on the system.
• Vibration Damping: Precision manufacturing requires minimizing vibrations that could affect the quality of the finished product. Flexible couplings with damping properties can absorb and dissipate vibrations, resulting in better surface finishes and accuracy of the machined parts.
• Torsional Flexibility: CNC machines may experience torque fluctuations during acceleration, deceleration, or tool changes. Flexible couplings with torsional flexibility can handle these variations and prevent torsional vibrations from affecting the machining process.
• Backlash Compensation: Some types of flexible couplings, such as beam couplings, offer minimal or near-zero backlash. This characteristic is essential in CNC machines, as it helps maintain positional accuracy during direction changes and reversals.
• High Torque Transmission: CNC machines may require high torque transmission capabilities, especially in heavy-duty cutting or milling operations. Flexible couplings can handle substantial torque loads while still providing flexibility to address misalignments.
• Reduced Maintenance: With the ability to absorb shocks and compensate for misalignment, flexible couplings can extend the life of other mechanical components in the CNC machine, reducing overall maintenance requirements and downtime.

It's important to select the appropriate type and size of flexible coupling based on the specific requirements of the CNC machine, including torque, speed, misalignment, and environmental conditions. Regular maintenance and inspection of the flexible couplings will ensure optimal performance and contribute to the overall precision and efficiency of the CNC machine.

How do flexible couplings compare to other types of couplings in terms of performance?

Flexible couplings offer distinct advantages and disadvantages compared to other types of couplings, making them suitable for specific applications. Here is a comparison of flexible couplings with other commonly used coupling types in terms of performance:

• Rigid Couplings:

Rigid couplings are simple in design and provide a solid connection between two shafts, allowing for precise torque transmission. They do not offer any flexibility and are unable to compensate for misalignment. As a result, rigid couplings require accurate shaft alignment during installation, and any misalignment can lead to premature wear and increased stress on connected equipment. Rigid couplings are best suited for applications where shaft alignment is precise, and misalignment is minimal, such as in well-aligned systems with short shaft spans.

• Flexible Couplings:

Flexible couplings, as discussed previously, excel at compensating for misalignment between shafts. They offer angular, parallel, and axial misalignment compensation, reducing stress on connected components and ensuring smooth power transmission. Flexible couplings are versatile and can handle various applications, from light-duty to heavy-duty, where misalignment, vibration damping, or shock absorption is a concern. They provide a cost-effective solution for many industrial, automotive, and machinery applications.

• Oldham Couplings:

Oldham couplings are effective at compensating for angular misalignment while maintaining constant velocity transmission. They offer low backlash and electrical isolation between shafts, making them suitable for precision motion control and applications where electrical interference must be minimized. However, Oldham couplings have limited capacity to handle parallel or axial misalignment, and they may not be suitable for applications with high torque requirements.

• Gear Couplings:

Gear couplings are robust and can handle high torque levels, making them suitable for heavy-duty applications such as mining and steel mills. They offer good misalignment compensation and have a compact design. However, gear couplings are relatively more expensive and complex than some other coupling types, and they may generate more noise during operation.

• Disc Couplings:

Disc couplings provide excellent misalignment compensation, including angular, parallel, and axial misalignment. They have high torsional stiffness, making them ideal for applications where accurate torque transmission is critical. Disc couplings offer low inertia and are suitable for high-speed applications. However, they may be more sensitive to shaft misalignment during installation, requiring precise alignment for optimal performance.

• Conclusion:

The choice of coupling type depends on the specific requirements of the application. Flexible couplings excel in compensating for misalignment and vibration damping, making them versatile and cost-effective solutions for many applications. However, in situations where high torque, precision, or specific electrical isolation is necessary, other coupling types such as gear couplings, disc couplings, or Oldham couplings may be more suitable. Proper selection, installation, and maintenance of the coupling are essential to ensure optimal performance and reliability in any mechanical system.

editor by CX 2024-03-13