a. Wall Thickness
If the inner wall of the hose is thicker, then under the same pressure tube gap, the pressure will be stronger, if the inner wall is thinner, it will be the opposite, and the same pressure will be smaller.
b. Material
For hoses of different materials, under the same pressure tube clearance, the harder the hose, the greater the pressure, and the softer the material, the lower the pressure.
c. Life
As the time of use becomes longer, the hose will gradually become softer due to fatigue and wear, and the corresponding pressure will become smaller. Similarly, if the pressure tube is too tight, it will accelerate the consumption of the life of the hose.