Twin sphere rubber expansion joint

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Twin sphere rubber expansion joint

Twin sphere rubber expansion joint is similar to single-ball joint in structure, but has a second sphere to provide more pipeline motion absorption capacity, and even higher noise and vibration control efficiency. Twin sphere rubber expansion joint can withstand the most stringent pipe system configuration. They allow for axial compression or extension, lateral deflection and angular motion.

Features

Vibration absorption, noise reduction, high pressure resistance, good elasticity, large displacement, balance pipe deviation, easy installation

Dimension: DN40mm-DN800mm
Product pressure: 0.6-2.5 MPa
Product Material: NR, EPDM, NBR, KFM, PTFE, CR
Flange material: carbon steel, stainless steel (304.316)
Service temperature: – 180 degrees to 250 degrees.
Applicable media: acid, alkali, corrosion, oil, hot water, cold water, compressed air, compressed natural gas, etc.

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OTHER EQUIPMENT Rubber Hose

Product information

PERFORMANCE

Features:

Suitable for suction and transportation (discharge).
Designed for greater compression, elongation and angular motion than single spherical expansion joints.
It is very suitable for absorbing thermal expansion and eliminating sound and vibration.
No gaskets and packing are required.
Good electrical insulator.
Absorb water pulsation and minimize water hammer.
Application:

Pressure piping system in building equipment and general industrial plant.
Pump and turbine circuits are used in power plants, industrial machinery and general purpose pump blowers.
Water supply and drainage pipes are used in water works and sanitary piping systems.
Pipelines in industrial plants and shipyards, etc.
Performance characteristics of double-sphere rubber-soft joint:

1. When installing double spherical rubber joints, it is strictly prohibited to install them beyond the limit of displacement.
2. Installation bolts should be symmetrical, gradually pressurized and tightened to prevent local leakage.
For working pressure above 3.1.6 MPa, the installation bolt should have elastic cushion to prevent the bolt from loosening.
4. When installed vertically, the two ends of the joint pipeline should be supported vertically, and anti-pull-out device can be adopted to prevent pull-out under pressure.
5. Double sphere rubber joint installation should be far away from heat source. Ozone zone zone. Strong radiation exposure and use of media that do not meet the requirements of this product are strictly prohibited.
6. It is strictly forbidden for sharp appliances to scratch surface and seal surface when double spherical rubber joint is transported, loaded and unloaded. Connection modes: generally there are threaded connection, flange connection and so on.
The multi-wave design of double-sphere rubber joint increases the length of rubber joint and the compensation.:

The multi-wave design of double-sphere rubber joint increases the length of rubber joint and the compensation. Special cold water, hot water, compressed air, natural gas and so on. With its superior design, novel structure and good sealing performance, it solves the problem of pipeline bursting and damage of pipeline connection equipment caused by thermal expansion and contraction, and effectively improves the service life of pipeline and the protection of equipment. Double spheres have greater compensation than single spheres. Because of its good comprehensive performance, the double-sphere rubber joint is widely used in chemical engineering, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, water heating, fire fighting, electric power and other basic projects, especially in pipelines with large vibration and frequent changes in heat and cold.

WORKING PRINCIPLE

PRODUCT PARAMETERS

Nominal Diameter(DN)		Length L	Diameter of the centralring of the bolt	Hole diameter quantitvd	Axial displacement		Horizontal Isplacement	Angular deflection
mm	inch	mm	mm		Extension	Compression	mm	(a1+a2)
40	1½	165	110	18-4	30	50	45	35º
50	2	165	125	18-4	30	50	45	35º
65	2½	175	145	18-4	30	50	45	35º
80	3	175	160	18-8	35	50	45	35º
100	4	225	180	18-8	35	50	40	35º
125	5	225	210	18-8	35	50	40	35º
150	6	225	240	22-8	35	50	40	35º
200	8	325	295	22-8	35	50	40	35º
250	10	325	350	22-12	35	60	35	30
300	12	325	400	22-12	35	60	35	30
350	14	330	460	22-16	35	60	35	30
400	16	330	515	26-16	35	60	35	30
450	18	330	565	26-20	35	60	35	30
500	20	350	620	26-20	35	60	35	30
600	24	350	725	30-20	35	60	35	30
700	28	350	840	30-24	35	60	35	30
800	32	400	950	30-34	35	60	35	30

NOTES:

Flange is available with DIN Standard,ANSI Standard,JIS Standard,and BS Standard.
Please sent us letter and drawing for customization if you have special requirements.
If this product is used for supplying water for high place, anti-pull-off device should be installed if the pipe has or fixed bracket is not as no fixed stay or fixed bracket or the force of fixed bracket is not large than axial force.

PRODUCT ALBUM

doublerubberjoint expansionjoint pipeline

INSTALLATION INSTRUCTIONS

Flexible rubber expansion joints shall not exceed the displacement limit during installation.
In the installation of bolts to be symmetrical, to gradually pressure and tighten, to prevent partial leakage.
When the rubber expansion joint is laid flat, suspended, and vertically installed, the actual working axial displacement pressure of the rubber joint should be less than the supporting force of the pipeline, otherwise the anti-lifting device should be installed to prevent the work from being pulled.
The installation location of the rubber joint should be kept away from the heat source and ozone area. It is strictly forbidden to irradiate with strong radiation, expose to the sun and use the medium that does not meet the requirements of this product.
When the rubber connector is transported, loaded, unloaded or installed, it is strictly forbidden to sharpen the surface sealing surface.
When installing DN200mm or above, please use butterfly valve special flange or small diameter flange for mating flange, so as to avoid flange pull-out, misalignment, sealing surface fracturing and water leakage after installation.