What is the material of the hose assembly?
The materials used for the internal and external adhesives of commonly used hoses include PVC polyvinyl chloride, PUR polyurethane, NR natural rubber, SBR oil-filled styrene-butadiene rubber, EPDM ter
What is the material of the hose assembly?
The materials used for the internal and external adhesives of commonly used hoses include PVC polyvinyl chloride, PUR polyurethane, NR natural rubber, SBR oil-filled styrene-butadiene rubber, EPDM ternary ethylene, NBR butadiene copolymer/nitrile, CR neoprene/rubber, SI silicone rubber, UPE/XLPE cross-linked polyethylene, UPE ultra-high molecular polyethylene, etc.
What is the selection technique of hose assembly?
There are many factors that affect the use of hose assemblies. The correct selection of hoses and connectors according to the working conditions can ensure the reliability and economy of hose use. These factors include:
Hose Size
The inner diameter of the hose should be moderate. Too small a pipe diameter will increase the flow rate of the medium in the pipe, thereby heating the system, reducing efficiency, generating excessive pressure drop, and affecting the performance of the entire system. If the hose is fixed by a pipe clamp or rubber passes through the steel plate And other gaps, you should also pay attention to the outer diameter of the hose.
Working pressure
The dynamic pressure of the general hose is the maximum pressure allowed when the hose is working continuously. According to the safety factor of hydraulic hoses specified in international standards, the recommended working pressure is generally 1/4 of the minimum rupture pressure value of the hose.
Impact pressure and fatigue life
The choice of hoses depends on the maximum pressure value in the design of the hydraulic system. The pressure value of the hydraulic system is usually dynamic, so shock pressure may occur, and the peak value of the shock pressure is much higher than the maximum pressure value of the system. However, since the system usually has an overflow valve, the impact pressure will not seriously affect the fatigue life of the hose. For hydraulic systems with particularly frequent impact pressures, it is particularly recommended to use hose products that are resistant to pulsation impact.
Temperature range
The user uses the hose within the temperature range allowed by the hose quality specification. If the working environment temperature exceeds this range, it will affect the life of the hose and its pressure resistance will be greatly reduced. It is recommended to use hose covers on systems where the working environment temperature is too high or too low for a long time.
chemical compatibility
If special hydraulic media are used, make sure that the selected hose is compatible with the hose inside, outside, connectors and O-rings.