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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Can Bellows Couplings Handle Angular and Parallel Misalignments Simultaneously?

Bellows couplings are designed to handle both angular and parallel misalignments simultaneously, making them versatile for various mechanical power transmission applications. The bellows element, typically made of a thin-walled metal structure, allows for flexibility in multiple directions, enabling the coupling to accommodate different types of misalignments.

1. Angular Misalignment: Angular misalignment occurs when the driving and driven shafts are not collinear and form an angle with each other. This type of misalignment can happen in applications where the shafts are not perfectly aligned due to assembly errors, shaft deflection, or thermal expansion. The bellows coupling’s design allows it to flex in response to angular misalignment, transmitting torque smoothly without inducing additional stress on the connected components.

2. Parallel Misalignment: Parallel misalignment, also known as lateral misalignment, happens when the axes of the driving and driven shafts are parallel but not concentric. This misalignment may occur due to inaccurate alignment during installation or shaft deflection under load. The bellows coupling’s flexible bellows element can also compensate for this type of misalignment, ensuring that the shafts remain parallel enough to prevent excessive forces and vibrations.

Simultaneous Misalignments: Bellows couplings are unique in their ability to handle both angular and parallel misalignments simultaneously. As the bellows element flexes in multiple directions, it can compensate for misalignments in both planes without imposing significant side loads on the shafts or bearings. This capability makes bellows couplings well-suited for precision motion control systems, where maintaining accurate alignment is crucial to ensure smooth operation and longevity of the equipment.

It is important to note that while bellows couplings can handle a certain degree of misalignment, excessive misalignments should be avoided to prevent premature wear and reduce the efficiency of the coupling. Regular maintenance and inspections can help identify and correct misalignment issues early, ensuring optimal performance and extended service life of the bellows coupling and the entire mechanical system.

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 2024-02-12