How to use the Hydraulic Hose?

The hydraulic hose in the system pipeline is more widely used. However, in actual use due to improper use and maintenance, resulting in hydraulic hoses leak more failures. Therefore, the proper use and maintenance of hydraulic hoses in order to extend its life and improve the reliability of its use.

Hydraulic hose leakage analysis

(1) Leakage due to reduced hose life due to improper hose installation. Hydraulic hoses have a theoretical neutral angle (typically 54。4 J454), whether in woven or wound reinforcement. When the hose is installed, if the pipe is twisted or the bending radius is small, the neutral angle of the reinforcing layer will deviate from the theoretical neutral angle so that the carrying capacity of the hose drops obviously, leading to the early explosion of the hose and the oil leakage. The test results show that when the hose is twisted 5。, hose life will be reduced to 70% of the original life expectancy.

(2) The use of the hose ambient temperature exceeds the allowable range, leading to the hose material aging cracked and cracked oil leakage. Due to the material properties of the hose, there should be a suitable operating temperature range. If the oil temperature of the hydraulic system or the working environment of the hose is too high, it will cause the hose material to age and crack in advance.

(3) hose itself is flawed, and external scratches or work with other parts of the frequent friction will lead to the hose shortening the service life and crack oil spill in advance.

A.Hydraulic rubber hose use precautions

(A) Pressure
1、Be sure to use the hose within the recommended temperature and pressure range.
2、The hose expands and contracts with its internal pressure, please cut the hose to a length slightly longer than you need.
3、When applying pressure, please open/close any valve slowly to avoid shock pressure.
(B) Fluid
1、The hose used should be suitable for the fluid being conveyed.
2、Please consult our company before using the hoses for oil, powder, toxic chemicals, and strong acid or alkali.
(C) Bending
1、Please use the hose under the condition that it is above the minimum bending radius, otherwise, it will cause the hose to break and reduce the pressure resistance.
2、When using powder and granule, according to the conditions that may produce easy to wear phenomenon, please enlarge the bending radius of the hose as much as possible.
3、Do not use under extreme bending near metal parts (joints) and try to avoid extreme bending near metal parts, which can be avoided by using elbows and other means.
(4) Do not move the installed hose at will, especially to avoid the process of moving the hose joint part of the force or bending transition.
(D) Other
1、Do not put the hose in direct contact with or near an open flame.
(2) Do not use vehicles and other vehicles to press and step on the hose.

B. Precautions for assembly

(A) Metal parts (joints)
1、Choose a hose fitting that fits the size of the hose.
2. When inserting the end of the fitting into the hose, apply oil to the hose and the end of the hose, and do not bake with fire. If you can’t insert it, heat the hose with hot water and insert it into the fitting.
3、Please insert the serrated end of the fitting completely into the hose.
4、Do not use a connector that can be pushed in once, it may cause the hose to break.
(B) Others
1、Please avoid using excessive ligature of wire, please choose a special sleeve or tie.
2、Please avoid using scarred or rusted joints.

C. Precautions for inspection

(I) Pre-use inspection
Before using the hose, please check the appearance of the hose for any abnormalities (trauma, hardening, softening, discoloration, etc.).
(ii) Periodic inspection
During the use of the hose, please be sure to implement a regular inspection once a month.

D, sanitary hose cleaning specifications

Sanitary hose is special, cleaning is also very special, before using the sanitary hose, must be flushed inside the hose to ensure the ideal sanitary condition when installed and used. Cleaning recommendations are as follows.
1, the maximum temperature of hot water is 90 ℃, the maximum temperature of the steam is 110 ℃ (the type of hose cleaning time within 10 minutes) and 130 ℃ (the type of hose high-temperature cleaning 30 minutes) two types, the specific product engineer recommendations shall prevail.
2, nitric acid (HNO3) or containing nitric acid components cleaning, the maximum concentration: 85 ℃ is 0.1%, 3% at room temperature.
3, chlorine (CL) or containing chlorine components cleaning, the maximum concentration: 1% at a maximum temperature of 70 ℃.
4, sodium hydroxide (NaOH) or contains sodium hydroxide cleaning, the maximum concentration: 2% at 60-80 ℃, 5% at room temperature.

E. Safety

1、Under certain conditions, the operator should wear safety clothing, including gloves, rubber boots, very long protective clothing, eye protection, this equipment is mainly used to protect the operator’s safety.
2、Make sure the working area should be safe and orderly.
3、Check whether the joints on each tube are secure.
4、Do not leave the tube in pressure-resistant condition when not in use. Close the pressure can extend the service life of the tube.

F, hose assembly installation diagram (hose bending radius operation method).