Standards of hydraulic hose fittings
High elastic PU pneumatic tube is mainly composed of liquid resistant inner adhesive layer, middle adhesive layer, 2 or 4 or 6 layers of steel wire winding reinforcement layer, outer adhesive layer. The inner adhesive layer has the effect of making the conveying medium bear pressure, protect the steel wire from erosion. The outer adhesive layer protects the steel wire from damage, the steel wire layer is the skeleton material plays a strengthening role.
High elastic PU pneumatic tube is mainly used in hydraulic support, oil field drilling, mine is suitable for engineering construction, lifting, transportation, metallurgy forging press, mining equipment, vessels, injection molding machinery, agricultural machinery, all kinds of machine tools and various industrial departments mechanization, automation has certain pressure in hydraulic system (high pressure) and temperature of oil (such as mineral oils, soluble oil, hydraulic oil, fuel oil, lubricating oil) and water-based liquids (such as emulsion, oil-water emulsion, water) and hydraulic transmission. The highest working pressure resistance can reach 60 Mpa. When using high elastic PU pneumatic tubes in various industries, we should pay attention to the following contents:
- High elastic PU pneumatic tubelayout should avoid heat source as far as possible, away from the surface of the engine exhaust pipe. When necessary, casing or protective screen can be used to avoid deterioration of the hose by heat.
- Must cross or may work with the mechanical surface friction place, the application of hose clamp or spring and other protective devices, so as to avoid damage to the outer layer of the hose.
- When the high elastic PU tube must be bent, the bending radius should not be too small and should be greater than 9 times the outer diameter.The joint of the hose and the joint should have a straight line section greater than 2 times the outer diameter of the pipe.
- 4. Installation should avoid in the tension state, even if there is no relative movement at both ends of the hose, also want to keep the hose loose, tensioned hose will expand under the action of pressure, strength reduction.
- Do not twist the high elastic PU pipe during installation.Slight torsion of the hose may reduce its strength and loosen the joint. The joint should be screwed to the hose during assembly, rather than the hose to the joint.
- If the hose is configured on the key parts, it is recommended to check or replace it regularly.
The corrosion resistance and wear resistance of the high elastic PU pneumatic tube are very strong, so it is widely used in various industries, but any item has its service life. If you want to extend the life of the PU tube, it is necessary to pay attention to the use of methods in the process of use, so that the PU pneumatic tube can play a better role and be more wear-resistant.
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