How to distinguish PA hose and PU hose
The right choice of high pressure rubber hydraulic hose
The correct choice of rubber hose, you can ensure the safety of the entire hydraulic system, reasonable arrangements for space, better control costs. Main note the following:
- According to the pressure of high pressure hose system, select the number of hose layers, high pressure, the number of layers of steel wire. Each hose has a maximum working pressure, the hose burst pressure is 4 times the maximum working pressure. The higher the pressure on the hose, the price will become high, so according to the actual system pressure, select the maximum working pressure of the hose than the actual work pressure can be a big point.
- If the system impact pressure is frequent, the use of special resistance to the pulse of the hose. Hydraulic high pressure hose is the hydraulic system and equipment in the important connection, can withstand high pressure, can easily disassemble, in the hydraulic industry is widely used. Hydraulic hose from the inside and outside the rubber layer and the inside of the wire braid layer composition, according to the hydraulic hose to bear the pressure, the number of layers inside the wire, the general steel layer from 1 to 6 layers, the maximum pressure to withstand 60 MPA. The inner rubber of the hydraulic hose is resistant to mineral oil, bio-oil, good expandable synthetic rubber, and the outer layer is abrasion resistant and anti-aging rubber. The middle of the high tensile steel wire wound layer. Hydraulic hose for the media: mineral oil, oil and water mixture, polyethylene glycol base oil, synthetic base oil, rapeseed oil. Commonly used hose for the working temperature: -40 ℃ – 100 ℃, the maximum temperature of 125 ℃.
- According to the flow of the choice of hose diameter, diameter is too small will increase the flow rate of the media medium, the system heat, reduce efficiency, and will produce excessive pressure drop, affecting the system can be the system, , So the hose diameter should be appropriate. When the hose with a tube clamp or hose through the steel plate and other spacers, but also pay attention to the outer diameter of the hose size.
- When selecting high pressure hose, pay attention to the bending radius of high pressure hose, calculate the bending radius should be subtracted before the joint buckle length. If the installed hose bending radius is too small, will reduce the hose pressure capacity and affect its life.
- according to the hydraulic layout of the rational selection of the form of joints such as: SAE flange joints, internal or external thread joints, 90,45 and other joint angle and the overall hose assembly angle.