Quick Detail
Place of Origin
HS-CODE
40-
Package & Delivery Lead Time
Detailed Description
MOQ:
1 SET
TRADE TERMS
FOB QINGDAO/TIANJIN/SHANGHAI OR CIF/CFR ANY DESTINATION PORT
CAPABILITY
1000 SETS PER MONTH
DELIVERY DEADLINE
7-40DAYS ACCORDING TO THE AMOUNT YOU BOOKED
PACKAGE
OUTSIDE PACKAGE: WOODEN CASE
INSIDE PACKAGE: PLASTIC FILM AND TEXILE MEMBRANE
WE CAN ALSO CHANGE AS YOUR REQUEST
1.flexible joint introduction:
1) Rubber flexible joint can greatly reduce pipeline system shock and noise. And can fundamentally resolve pipe joints displacement, axial stretch and non-concentricity.
2)By using different materials, it can be made many kinds to cater for different medium and environment. Such as acid resistance, alkali resistance, corrosion resistance, oil resistance and heat resistance etc.
3)The material is pure rubber, sealing is very good. It is in light weight, very easy for installation . Rubber flexible joint has long life performance, but must be not contact with sharp metal instruments to avoid piercing the sphere.
4) Rubber flexible joint can be used for lift and transportation of raw water and sewage,transportation of water supply cooling cycle water thermal power ,condensatewater of metallurgy industry and chemical industry.
2.classification
(1)according to appearence: concrentric with diameter rubber flexible joint,concentric reducer rubber flexible joint,eccentic reducer rubber flexible joint.
(2)according to the structure:single ball flexible rubber joint,double sphere rubber joint,spheres rubber joint,elbow sphere rubber joint.
(3)according to the link the form:flange coupling,threaded joint
3.material list:
NO
NAME
MATERIAL
1
Inner rubber
IIR,CR,EPDM,NR,NBR
2
Outer rubber
IIR,CR,EPDM,NR,NBR
3
Framework layer
Polyester cord fabric
4
Flange
Q235
5
Reinforcing ring
Steel wire rope
4. flexible joint physical and mechanical propeties form:
No
Item
Index
Test value
Inner rubber
Outer rubber
1
≥Tensile strength(MPa)
12
13
13.6
2
≥Break strength (%)
450
500
564
3
≤Break permanent deformation (%)
25
30
22
4
≤Brittleness temperature(°C)
-30
-30
-40
5
≥Viscosity(KN/m)
2.0
2.0
5.6
6
Aging hot air (100°C×48h)
Tensile strength change (%)
+25~-25
+25~-25
20
Tensile rate change (%)
+10~-30
+10~-30
5
7
≥Acid resistant10%H2SO4×168h
0.7
0.7
0.85
8
≥Alkali proof10%NaOH1×68h
0.7
0.7
0.85
5.rubber flexible 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.
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