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Eccentric reducing rubber expansion joint

Henan Liwei Industry Co.,Ltd

Eccentric reducing rubber expansion joint

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Place of Origin : China

Brand Name : Liwei

Certification : ISO9001,14001,BV,CE,SGS

Price : 120

Packaging Details : wooden case

Delivery Time : 5-30 working days

Payment Terms : T/T,L/C

Supply Ability : 3000 sets/month

MOQ : 1 set

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Introduction of eccentric reducing rubber expansion joint

Eccentric reducing rubber expansion joint can solve the problem of different diameter when connecting to metal pipe, has the effect of the damping noise reduction at the same time, and can save piping parts, saving cost. It consists of inner rubber, fabric reinforced layer, middle layer, outer layer, end reinforced metal ring or steel wire ring, metal flange or parallel of union.

Characteristics of eccentric reducing rubber expansion joint

With high pressure, good elasticity, large displacement, balancing pipe deviation, absorption vibration and good noise reduction effect, convenient installation and other characteristics, eccentric reducing rubber expansion joint can be widely used in water supply and drainage, circulating water, hvac, fire protection, papermaking, pharmaceutical, petrochemical, ship piping system, water pump, compressor, fan, etc.

Classification of eccentric reducing rubber expansion joint

Generic class: suitable for conveying water that the temperature is -15~80°C and the acid solution or alkali solution that concentration is below 10%.

Special classes: suitable for special performance requirements, such as resistance to oil, plug, ozone, abrasion and resistance to chemical corrosion.

Heat-resistant class: suitable for conveying water that temperature is higher than 80°C.

Main performance and functions of eccentric reducing rubber expansion joint

1. Pipe – the pump installation: the eccentric reducing expansion joint is used to prevent cavitation, when installed at the entrance of the pump, it generally should be installed roof flat, thus prevent the pipe gas accumulating in the pump inlet, form big bubbles into pump cavity, and damage the pump.Only one case can be smooth installation. That is behind the head size directly after bending elbow upward. In this case the gas phase may not accumulate.

2. Pump, pipeline concentric reducer installation: there are differences between the pump export DN and outside pipeline system. Using the concentric reducing expansion joint, which can realize the two pipes of different size linear connection, the realization of variable diameter pipe fittings.

Eccentric reducing rubber expansion joint axial displacement is: rubber joint’s elongation or compression is in line with the fluid flow direction (that is, the central axis direction).

Eccentric reducing rubber expansion joint lateral displacement is: rubber joint’s axis displacement is in a direction perpendicular to the flow direction.

Eccentric reducing rubber expansion joint angular displacement is: rubber joint of two end face of the Angle sum of the vertical centerline and the original axis.

Material list ofeccentric reducing rubber expansion joint:





Inner rubber



Outer rubber



Framework layer

Polyester cord fabric





Reinforcing ring

Steel wire rope

Rubber expansion joint production progress

(1) Raw material: we never use reclaimed raw rubber, rubber is imported from USA. Before used, raw material should be tested, including physical test and some chemical experiment to test the hardness and so on;

(2) Rubber pretreating and ingredients;

(3)milling: first, rubber plastication, second, rubber mixing, we will add rubber compounds, like sulfurzing reagent, surfactant, softener, stabilizer, foaming agent and some special compounds, at the same time, rubber will be extruded into plates, cut, produce 45 degree angle. The plates cannot directly be used , they should be cooled about 24 hours;

(4) Molding: it will cost much time;

(5) Vulcanizing: the largest vulcanizing tank in Asia ø5000*15000, right time, temperature, pressure is very important;

(6) Test and experiment: these tests should be done, hydraulic test, resistance to vacuum, displacement of the performance, rubber physical properties, thickness and the strength and other quality test;

(7) Package: out package the free of fumigation wooden case; inside package: plastic film and textile membrane.

Product Tags:

expansion joint


rubber expansion joint

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