R134a, HFO 1234yf A10 16mm auto air conditioner hose rubber hose

 The pictures of production process:

1.The first crushing and pressing procedure  2.The procedure of center rubber extrusion  3.The procedure of winding intertexture 4.The procedure of outer rubber extrusion 5..Wrapping plastic procedure 6.Printing procedure     

This product is forbidden to contact with the acid,Alkali,oil and organic solution etc.;keep it far away from heat source and keep it clean;it should be laid flatly in storage,keep it in dry environment with good air ventilation.This product is suitable to the pure F-12 auto air conditioning system,never use the other code refrigerant.

Checking And Using: 1.After buckling and crushing,the assembly of the air conditioner hose must be taken the test of 100% checking leakage.The recommended method of checking leakage: uses the Nitrogen of 3.5MPa to test the pressure inside the water,keep the pressure for 90 seconThe caution matters of the installing,buckling up and usage for the R134a auto air conditioner hose:                                                                                f

The hose cutting of the rubber hose: 1.The incision of the section for the air conditioner hose must be flat and smooth

2. The inner wall of the air conditioner hose is clean and has no impurity;

Assembling: 1.Choose the joint and the aluminum sleeve which sizes are suitable to the standards 2.The smooth joint.No rags and acute angles;the rubber hose must be installed in position. 3.While the assembly of the hose is being installed,you should prevent the twisting of the hose and avoid the sharp bending of the joint nearby for the hose,so as to avoid causing the incidents of leakage,abnormal bursting and cracking or pulling off of the joint. 4.High temperature easily cause the aging,bursting and cracking of the system hose,make the refrigerant leaking,make the air conditioner system broken.In the using process of the hose,should avoid forming the severe fritions,direct contacts or closing to the exhaust etc. parts of high temperature with other parts, if unable to avoid it,you should take the measure of putting the wear-resisting sheath inside.                 

Buckling up and crushing: 1.The size of the external diameter for buckling and crushing=The shortest external diameter of the lining core(the size of the pressure groove position)+2 x the wall thickness of the aluminum sleeve+2x0.65 x the wall thickness of hose. 2.The size of the buckling and crushing too short : easily brings damage to the braided wire of the air conditioner hose or the inner wall layer of hose,causes the incident of hose bursting. 3.The size of the buckling and crushing too long: easily make the assembly of the hose loose,causes the pulling off of the joint,leakage of the refrigerant. 4.The coefficient of compressibility for buckling up and crushing the hose is 0.35 5.Put the joint locating in the middle of the mould as possible as you can when buckling and crushing.ds,not permitted to exist the incident of the leakage.(Note:The pinhole on the surface of the hose is used for discharging the gas inside the skeleton layer,it is usual that the air bubbles occur in the position of the pinhole in the beginning of testing the pressure for the hose,and afterwards the bubbles gradually disappear in the coming test of the pressure. 2.The refrigerant selected to use must adapt to the requirements,HFC-134A and other refrigerant are different from CFC-12 refrigerant system,also different to the chemical characteristics,you must not use the wrong refrigerant in use.Improper selecting and using will cause the incident of the inner wall of the hose corrupted or fish scale,will cause the defaults of the air conditioner system.The cooling lubricating oil supporting the CFC-12 refrigerant is mineral oil,you should select and use the mineral oil suitable to the CFC-12 refrigerant system in the using process,improper using and using also will cause the inner wall of the hose corrupted,and the incident of hose bursting or blocking the air conditioner system occurs.

The size controlling standard of the R12-A20 air conditioner hose unit:mm

Norminal diameter                Inner diameter                                 Outer diameter

                                  Maximum value Minimum value Maximum value Minimum value

                8                               8.6                        7.8                       19.1                 17.5

               10                             11.1                     10.2                      23.0                 21.4

               13                             13.6                     12.4                      25.4                 23.8

               16                             16.8                     15.6                      28.5                 27.0                      

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