Product Description

Single Sphere Rubber Bellows,2018 most popular ball rubber expansion joint fittings bellow coupling

 

Rubber expansion joint advantage:

 

A: 15 minutes zinc plating, high pressure resistance, high temperature resistance, oil resistance, wear resistance, corrosion resistance, acid and alkali resistance. 

B:Connect with pump, valve, fire fighting equipment, pipe which vibrate big, pipe which hot and cold change frequently.

C: Natural rubber content of 40-7 percent, can continue to use for 15 years without aging.

 

 

The form: this rubber expansion joint consists of rubber pipe, made of inner glue, multi-layer proofinf and cord fabric and outer glue abd metal woggle joint.
It is applicable for the connection of inlet and outlet pipes of various fancoil sets of air conditionings in the guest rooms of hotels and restaurants.

Product Feature

The rubber joint can greatly reduce pipeline system vibration and noise, can solve the problem of joint displacement, axial expansion, etc.

According to different materials, it can be made into many kinds, adapt to many mediums and different environment.

Good sealing rubber, light weight, easy installation, long service life, and avoid contacting with sharp metal device.

If use overhead, can match with elastic support.

If pipeline pressure is high, should use bolt connect the flange both ends.

Technical Parameters

Nominal diameter(mm)		32~1200	32~1200
Nominal pressure(Mpa)		1.0	1.6
Testing pressure	Seal(Mpa)	1.1	1.76
Suitable temperature(°C)		-20°C~120°C
Suitable medium		Drinking water,sewage,seawater,food,medicines,gas,oil and acid

Main Raw Material

Flange		WCB Cold/Hot Galvanizing
Joint		EPDM/NBR

Reference Standard

Testing standard			API 598
End flange standard			DIN PN10 / PN16,ANSI 125# / 150#,BS4504 PN10 / PN16

Overall Dimension and Weight

 

Size	ΦD1	ΦD2	N-Φd	D	d	Extension	Compression	Horizontal  displacement (mm)	Deflexion  angle	Weight (kg)
DN32	140	100	4-18	95	16	6	9	9	15°	3.4
DN40	150	110	4-18	95	18	6	10	9	15°	4
DN50	165	125	4-19	105	18	7	10	10	15°	5.5
DN65	185	145	4-19	115	20	7	13	11	15°	6.7
DN80	200	160	8-19	135	20	8	15	12	15°	7.7
DN100	220	180	8-19	150	22	10	19	13	15°	9.4
DN125	250	210	8-19	165	24	12	19	13	15°	12.7
DN150	285	240	8-23	180	24	12	20	14	15°	15.8
DN200	340	295	12-23	210	24	16	25	22	15°	20
DN250	405	355	12-28	230	28	16	25	22	15°	29.22
DN300	460	410	12-28	245	28	16	25	22	15°	32.8
DN350	520	470	16-28	255	28	16	25	22	15°	41.3
DN400	580	525	16-31	255	30	16	25	22	15°	55.6
DN450	640	585	20-31	255	30	16	25	22	15°	61.8
DN500	715	650	20-34	255	32	16	25	22	15°	69.4
DN600	840	770	20-37	260	36	16	25	22	15°	96.8
DN700	910	840	24-37	320	36	16	25	22	15°
DN800	1571	950	24-41	340	36	16	25	22	15°
DN900	1125	1050	28-41	370	36	16	25	22	15°
DN1000	1255	1170	28-44	400	36	18	26	24	15°
DN1200	1485	1390	32-50	420	36	18	26	24	15°

 

Why Choose US

We test leakage of each roll before braiding, then we cut 300mm and crimp it to test
burst pressure after brading.

We use CNC Lathes Machine for end fittings production. Machine system, knife and inspection
tools are all imported from Japan.

We use Techmaflex Crimping Machine which is imported from France. This machine has
accurate and stable performance for crimping because it is produced for PTFE hose crimping only.

Contact to this supplier

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Are There Specialized Bellows Couplings Designed for High-Speed or High-Torque Applications?

Yes, there are specialized bellows couplings designed to excel in high-speed or high-torque applications. These specialized couplings are engineered to meet the unique demands of such scenarios, providing optimal performance, reliability, and durability. Here’s how bellows couplings are tailored for high-speed and high-torque applications:

• High-Speed Bellows Couplings: For high-speed applications, the primary consideration is reducing rotational inertia to minimize the effects of centrifugal forces. High-speed bellows couplings are crafted using lightweight materials, such as aluminum or titanium, to achieve lower inertia. The low inertia helps to minimize the risk of resonance and vibrations at elevated speeds, ensuring smooth operation. Additionally, these couplings undergo precise balancing to further enhance their suitability for high-speed applications.
• High-Torque Bellows Couplings: High-torque applications demand couplings capable of transmitting substantial amounts of torque without failure. In such cases, bellows couplings are designed with robust materials, such as stainless steel or alloy steel, to handle the increased torque load effectively. The bellows structure is also engineered with thicker walls to improve torsional stiffness and torque transmission capabilities. Furthermore, the coupling’s design may incorporate multiple bellows to distribute the load evenly, preventing stress concentration on a single point.
• Custom Engineering: Some high-speed and high-torque applications may require bespoke solutions. In such instances, manufacturers offer custom engineering services to tailor the bellows coupling’s dimensions, materials, and features to the specific requirements of the application. Customization ensures that the coupling can meet the stringent performance demands and environmental conditions of the particular high-speed or high-torque setup.

It is crucial to select the appropriate bellows coupling that matches the application’s exact specifications and operational parameters. Choosing the right coupling will ensure smooth operation, prevent premature wear, and optimize the efficiency and reliability of the entire system. When working with high-speed or high-torque applications, consulting with experienced coupling manufacturers or engineering experts can help in selecting the best-suited bellows coupling for the intended use.

How do bellows couplings ensure torque transmission and minimize backlash in precision systems?

Bellows couplings are used in precision systems to transmit torque between two shafts while minimizing backlash, which is crucial for maintaining accurate positioning and reducing vibrations. Here’s how they achieve these functions:

1. Torsional Rigidity: Bellows couplings are designed with a series of flexible metal convolutions (bellows) that allow angular misalignment between the shafts. The metal bellows provide high torsional rigidity, ensuring efficient torque transmission from one shaft to the other with minimal power loss.
2. Backlash Elimination: Backlash is the play or movement that occurs when reversing the direction of rotation in a mechanical system. Bellows couplings are ideal for precision applications because they have virtually zero backlash. The absence of backlash helps maintain accurate positioning and prevents undesired movements in precision machinery.
3. Compensation for Misalignment: In precision systems, shaft misalignments can occur due to manufacturing tolerances, thermal expansion, or other factors. Bellows couplings can accommodate angular, axial, and parallel misalignments, ensuring smooth operation and preventing excessive stress on the shafts and connected components.
4. Vibration Damping: The flexible nature of bellows couplings also provides some level of vibration damping. This feature helps reduce vibrations and shocks in the system, which is especially important in sensitive precision equipment to maintain stability and accuracy.
5. Compact Design: Bellows couplings are compact and lightweight compared to some other coupling types, making them suitable for applications where space and weight restrictions are important considerations.

In summary, bellows couplings play a crucial role in precision systems by ensuring efficient torque transmission, minimizing backlash, compensating for misalignments, dampening vibrations, and providing a compact design. These features make them an excellent choice for high-precision machinery and applications where accuracy and reliability are paramount.

Can you explain the Working Principle of a Bellows Coupling and its Advantages in Various Industries?

A bellows coupling is a type of flexible coupling that consists of a bellows element, which is a thin-walled, corrugated metal tube. The working principle of a bellows coupling involves utilizing the elasticity and flexibility of the bellows to transmit torque while accommodating misalignments between the driving and driven shafts.

When torque is applied to the coupling, the bellows element flexes and expands or contracts based on the rotational motion of the shafts. This flexing capability allows the coupling to compensate for angular, axial, and parallel misalignments, providing a degree of freedom for both shafts without inducing excessive stress or load on the connected machinery.

Advantages of Bellows Couplings in Various Industries:

• High Misalignment Compensation: Bellows couplings can accommodate higher misalignments compared to other coupling types, making them ideal for applications where precise alignment is challenging or where shafts may experience dynamic misalignments during operation.
• Torsional Stiffness: Some bellows coupling designs offer high torsional stiffness, ensuring efficient torque transmission and maintaining positional accuracy in motion control systems.
• Backlash-Free: Bellows couplings are typically backlash-free, meaning they have minimal play or clearance between the bellows and the coupling hubs. This characteristic is crucial in precision systems where any degree of backlash can lead to positioning errors.
• Vibration Dampening: The flexible nature of the bellows element helps dampen vibrations and shocks, reducing wear and tear on connected components and improving overall system reliability.
• Electrical Isolation: Some bellows coupling designs offer electrical isolation between the shafts, preventing the transmission of electrical currents and providing protection to sensitive electronic equipment.
• Compact Size: Bellows couplings are available in compact designs, making them suitable for applications with limited space, such as robotics, aerospace, and medical devices.
• Temperature and Corrosion Resistance: Depending on the material used, bellows couplings can exhibit excellent resistance to high temperatures and corrosion, making them suitable for harsh environments in industries like oil and gas, chemical, and marine.

Bellows couplings find applications in a wide range of industries, including robotics, automation, aerospace, medical equipment, semiconductor manufacturing, precision machinery, and more. Their ability to handle misalignments, provide backlash-free motion, and offer excellent torsional stiffness makes them a versatile and reliable choice for critical motion control systems.

editor by CX 2024-03-13