Product Description

DN250 10″ Universal Wide Range Flexible Ductile Iron Straight Coupling

MATERIALS
ITEM	PARTS	MATERIAL
1	Body	BSEN1563 EN-GJS(QT)-450-10/Carbon Steel
2	Gland	BSEN1563 EN-GJS(QT)-450-10
3	Seals	EPDM/NBR
4	Fasteners	Stainless Steel/Carbon Steel with Dacromet Coating/GAL Carbon Steel
5	Coating	Fusion Bonded Epoxy

DIMENSIONS(PN10/PN16)
DN	RANGE	L	L1	H	ID	ID1	OD	N-MSXL1	BOLT TORQUE	WIGHT(KG)
(mm)		(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(mm)	(Nm)
50	59-72	188	148	95	72	76	153	4-M12*180	55-65	4.1
65	72-85	188	148	95	85	89	173	4-M12*180	55-65	4.1
80	88-103	188	146	95	103	107	185	4-M12*180	55-65	4.1
100	109-128	188	146	95	127	132	208	4-M12*180	55-65	4.6
125	138-153	198	153	95	158	162	256	4-M12*190	55-65	8.3
150	159-182	198	153	95	182	186	280	4-M12*190	55-65	8.5
175	189-212	233	187	130	211	216	329	4-M12*225	55-65	9.0
200	218-235	233	187	130	234	239	333	4-M12*225	55-65	10.6
225	242-262	233	185	130	261	265	379	6-M12*225	55-65	14.5
250	272-289	233	186	130	288	295	391	6-M12*225	55-65	15.4
300	315-349	233	187	130	349	352	464	6-M12*225	55-65	20.0
	322-339	233	187	130	338	345	444	6-M12*225	55-65	23.1
	338-360	233	187	130	359	366	460	6-M12*225	55-65	23.1
350	351-391	250	187	130	390	395	502	10-M12*225	55-65	26.8
400	400-442	250	187	130	441	446	558	10-M12*225	55-65	31.9
450	455-493	250	187	130	492	497	608	10-M12*225	55-65	36.6
500	500-599	250	187	130	598	594	662	10-M12*225	55-65	40.0
600	600-692	250	187	130	691	697	768	10-M12*225	55-65	42.0
700	708-780	250	187	130	779	785	910	10-M12*225	55-65	45.0

 

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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.

What are the maintenance intervals and practices for extending the life of a flexible coupling?

Proper maintenance of a flexible coupling is essential to ensure its longevity and reliable performance. The maintenance intervals and practices for flexible couplings may vary depending on the coupling type, application, and operating conditions. Here are some general maintenance guidelines to extend the life of a flexible coupling:

• Regular Inspection: Conduct visual inspections of the coupling regularly to check for signs of wear, damage, or misalignment. Look for cracks, tears, corrosion, or any other visible issues.
• Lubrication: Some flexible couplings may require periodic lubrication to reduce friction and wear. Refer to the manufacturer’s guidelines for the appropriate lubrication type and schedule.
• Alignment Checks: Ensure that the connected shafts remain properly aligned. Misalignment can lead to premature wear and failure of the coupling and other components.
• Torque Monitoring: Monitor the torque levels in the system and ensure they are within the coupling’s rated capacity. Excessive torque can overload the coupling and cause damage.
• Temperature and Environmental Considerations: Ensure that the operating temperatures and environmental conditions are within the coupling’s specified limits. Extreme temperatures, aggressive chemicals, or corrosive environments can impact the coupling’s performance.
• Inspection After Shock Loads: If the system experiences shock loads or unexpected impacts, inspect the coupling for any signs of damage immediately.
• Replace Damaged or Worn Couplings: If any damage or wear is detected during inspections, replace the flexible coupling promptly to avoid potential failures.
• Periodic Re-Tightening: For certain coupling designs, periodic re-tightening of fasteners may be necessary to maintain proper clamping force.
• Follow Manufacturer’s Guidelines: Always follow the maintenance instructions provided by the coupling manufacturer. They can provide specific recommendations based on the coupling model and application.

It is crucial to develop a maintenance plan specific to the application and coupling type. Regularly scheduled maintenance, adherence to recommended practices, and proactive inspection can help identify issues early and prevent costly breakdowns. Additionally, record-keeping of maintenance activities can provide valuable data on the coupling’s performance and aid in future maintenance decisions.

How does a flexible coupling handle angular, parallel, and axial misalignment?

A flexible coupling is designed to accommodate various types of misalignment between two rotating shafts: angular misalignment, parallel misalignment, and axial misalignment. The flexibility of the coupling allows it to maintain a connection between the shafts while compensating for these misalignment types. Here’s how a flexible coupling handles each type of misalignment:

• Angular Misalignment: Angular misalignment occurs when the axes of the two shafts are not collinear and form an angle with each other. Flexible couplings can handle angular misalignment by incorporating an element that can flex and bend. One common design is the “spider” or “jaw” element, which consists of elastomeric materials. As the shafts are misaligned, the elastomeric element can deform slightly, allowing the coupling to accommodate the angular offset between the shafts while still transmitting torque.
• Parallel Misalignment: Parallel misalignment, also known as offset misalignment, occurs when the axes of the two shafts are parallel but not perfectly aligned with each other. Flexible couplings can handle parallel misalignment through the same elastomeric element. The flexible nature of the element enables it to shift and adjust to the offset between the shafts, ensuring continuous power transmission while minimizing additional stresses on the machinery.
• Axial Misalignment: Axial misalignment, also called end-play misalignment, occurs when the two shafts move closer together or farther apart along their common axis. Flexible couplings can handle axial misalignment through specific designs that allow limited axial movement. For instance, some couplings use slotted holes or a floating member that permits axial displacement while maintaining the connection between the shafts.

By providing the capability to handle angular, parallel, and axial misalignment, flexible couplings offer several advantages for power transmission systems:

• They help to prevent premature wear and damage to the connected equipment, reducing maintenance and replacement costs.
• They minimize vibration and shock loads, enhancing the overall smoothness and reliability of the machinery.
• They reduce the risk of equipment failure due to misalignment-induced stresses, improving the system’s operational life.
• They allow for easier installation and alignment adjustments, saving time and effort during setup and maintenance.

Overall, flexible couplings play a crucial role in handling misalignment and ensuring efficient power transmission in various industrial applications.

editor by CX 2024-04-25