Home >> News >> News How Do I Route Hydraulic Hoses? -10 Suggestions

 

 

Safety and security and also performance are top considerations when using hydraulic hose. To assure performance and also avoid potential risks in the work environment, proper setup is critical. A secure workplace and desired performance both need appropriate hydraulic hose directing, and these handy installation pointers are one method to guarantee efficiency and also aid avoid early hose failure.

 

Do Not Exceed Minimum Bend Radius

Use tools to avoid exceeding the minimum bend radius. Bending hose beyond the recommended bend radius places excessive stress on hose reinforcement can create large holes between strands of hose reinforcement, and severely reduces the hose's pressure capacity. Exceeding the minimum bend radius can result in a burst hose. The minimum bend radii for each hose is stated in the hose tables in the catalog.

 

Allow for Slack

Use tools that provide enough slack to allow for changes in length to occur when hose is pressurized. Hydraulic hose is capable of elongating up to 2% or contracting up to 4%, depending on construction. The hose length must be determined so that the hose assembly has enough slack to allow the system components to move or vibrate without creating tension in the hose. The service life of hose is reduced if hose assemblies do not permit adequate flexing and allow for length changes due to expansion or contraction. When pressurized, a hose that is too short may stress the hose fitting connections or pull loose from its fittings, causing premature metallic or seal failures. It is important not to allow too much slack and therefore introduce the risk of the hose snagging on other equipment or rubbing on other components.

 

Use Elbow Fittings or Adapters When Necessary

A general rule of thumb for hose installation is if the hose needs to bend immediately before the metal fitting, you should keep it straight for at least twice the outside diameter (O.D.). If that’s not possible, use a 90 or 45-degree elbow fitting. This prevents fluid under pressure, traveling at high speeds, from directly impacting the core tube, which can deteriorate the hose and cause premature failure. Adapters ease port connections and hose installation and can be used to change thread configuration. Adapters should be used sparingly to keep assembly components at a minimum to avoid longer assembly time and cost, and prevent potential leak points in hose assembly.

 

Avoid Twisting the Hose

Avoid placement that requires twisting the hose during installation, as it misaligns the reinforcement and reduces a hose’s capacity to withstand pressure. A simple way to identify twisting is to look at the layline, which is the continuous line of information printed on a hose with the part number, pressure, etc. If the layline is twisted like a candy cane, it means that the hose was twisted during installation, which can cause premature hose failure.

 

The Plane of Movement Must be Considered

Be sure to route high-pressure hydraulic hose parallel to machine contours using elbows or adapters. This decreases the length of hose lines and reduces hard angle bends that restrict flow and strain the hose, saving money and maximizing hose capability.

 

Avoid Abrasive Influences

Avoid placing hose near any object with sharp or abrasive surfaces, or too close to other hoses as direct surface contact with equipment components, hoses, or material in the operating environment will cause abrasive wearing of the outer cover, risking exposure of the reinforcement. However, if the application is such that contact cannot be avoided, either a hose with a higher abrasion resistant hose cover or a protective sleeve should be used. Parker ToughCover (TC) or SuperTough (ST) covers offer 80 times and 450 times respectively the abrasion resistance of standard rubber covers.

 

There is a Right and Wrong Way to Clamp Hoses

Keep in mind the mechanical movement and vibration of hose when bundling. Crossing or clamping high- and low-pressure hoses together can lead to wear in the hose covers, decreasing productivity and risking safety hazards. Correct clamping should be exercised to securely route the hose and avoid the hose contacting surfaces that will cause the hose damage. If hose follows a compound bend, it should be coupled into separate segments or clamped into segments that flex on a single plane.

 

Do Not Mix Hoses and Fittings

To ensure maximized service life and safe function, do not mix and match hoses and fittings from different manufacturers. It is vital to work capability and safety that the hose and fitting manufacturer are the same, and that the assembly uses the recommended equipment, parts, and procedures as per the manufacturer. Correct fittings can avoid unnecessary strain on the hose, excess length, or multiple threaded joints.

 

Plan for Future Maintenance

Few things are more aggravating that having to take apart adjoining assemblies to access a specific hose that needs maintenance. Avoid this scenario by using different combinations of hose ends and tube fittings, such as short and long straights, or short and long elbows. Taking this step when installing a hose reduces maintenance effort and downtime. Avoid unnecessary hose strain by utilizing elbows and adapters for ease of routing. These tools help to relieve strain on the assembly and allow for clean, accessible installations. Inspection and maintenance might be necessary, so prohibitive design routings of hose assemblies should be avoided.

 

Temperature Directly Affects Hose Life

Keep hydraulic hoses away from external heat sources, as high ambient temperatures shorten hose life. Temperature increases of can lead to cracking and shorten hose life. The more extreme the ambient temperature is, weather hot or cold, the more durable the hose cover needs to be. Another option would be installing sleeves, which can help protect hose from hot equipment parts and other high temperature sources that are potentially hazardous.

 

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Vibrating Screens Use General Knowledge

 

 

Do you know what you need to pay attention to when using a vibrating screen? Read on for more tips on how to use a vibrating screen.

 

Installation of vibrating screen

1. Remove the transport support. Since the base of the sieve machine and the screen frame are connected by springs, the upper part of the sieve machine is firmly supported by transport support during transportation. After entering the installation site, the transport support should be taken down. It is strictly forbidden to try the machine without taking the transport support.

2. The sieve machine should be installed on a horizontal foundation. In the occasion of not playing the foundation, should be laid between the table and the machine seat anti-vibration rubber plate.

3. The vibrating motor and the cable line in the screen machine are subjected to severe vibration, and the standard ground should be connected for safety.

 

Adjustment of the phase angle of the upper and lower weights of the motor

1. Changing the phase angle of upper and lower hammers can change the trajectory and residence time of materials on the net. In order to make the sieve machine adapt to the separation state required by various materials, such as the distribution of materials, processing capacity, separation efficiency, over the net rate, and other changes. It should be adjusted to the best condition.

Note: The direction of operation of the two motors is reversed to each other! Two motors can run inward or outward at the same time.

2. motor phase angle adjustment. The phase angle of the upper and lower weights decreases or increases, and its effect is to increase or decrease the excitation force of the sieve machine. According to the number of layers of the user's sieve machine, the material-specific gravity is different to increase or decrease the excitation force. Adjustment of the phase angle of the motor weight can achieve the best screening effect. The phase angle of the motor up and down must be the same.

3. sometimes due to the specific gravity of the material, humidity, stacking tilt angle, and other parameters, the above adjustment phase is not possible to adjust successfully at once. So please ask the user to have sufficient patience to adjust, so that the sieve machine can play the high efficiency as it should.

 

Test run

1. Close the power switch, run 20-30 minutes air rotation, the motor should normally run in a counterclockwise direction, if the direction is not correct, please adjust the three-phase power supply.

2. should confirm that the vibration motor is running within the rated current, at the beginning of the operation, especially in low-temperature occasions, the current will be slightly higher, but within 20-30 minutes, it should be reduced to the rated current value.

3. Vibrating screen shall not have abnormal sound occurring, if the abnormal sound occurs, the machine shall be quickly shut down for inspection, the occurrence of abnormal sound is generally caused by the fastening part loosening. Especially in the transport and disassembly and reassembly, pay attention to the fastening of the parts. Sieve machine in the start and stop when there is a momentary resonance area (1-3 seconds) when the amplitude and noise will increase significantly, is a normal phenomenon.

4. After the empty operation, a small amount of material can enter the sieve machine through the inlet, and then slowly increase to the required and can withstand the amount of material, at this time should be adjusted according to the net surface out of the heavy hammer, so that the efficiency of the sieve machine to achieve the best state.

5. The general material of this series screen machine is not equipped with a bouncing ball device to meet the screening requirements, special materials need to be equipped with bouncing ball device separately designed and installed, no-load noise will increase at this time.

 

Screen mesh replacement

1. When the screen is found to be broken and needs to be replaced with a new screen, just loosen the external locking handle, take off the screen grid, take out the screen frame, remove the rubber seal, fasten bolts, and loosen the fastening bolts of the screen frame to replace the broken screen.

2. Then replace the screen with a new one, and reassemble it according to 6.1 in reverse order. Note: the net must be flat and solid, to lock the lower bolt of the screen frame first, and then lock the upper bolt, the two external V-groove bolts must be tightened.

 

Maintenance of equipment

1. The equipment should be refueled frequently when it is running, twice a week, inject Shell, Avalanche, RL3 grease.

2. every three months to carry out minor repairs and maintenance, 6-12 months for a major overhaul, overhaul to check the motor, the fasteners are not loose, disassemble the vibrator to clean and check the bearings, oil seals, serious wear should be replaced.

3. regularly check the cable (three months to change the motor lead)

 

We are a vibrating screen supplier, please feel free to contact us if you need them.