There are many different types of Howo asphalt distributor truck. If you are looking for one to purchase, you will want to look for the most efficient one that you can get. This will be based on the needs of your company. You should also consider the type of road you will be using it on. For example, if you will be driving on the highway, you will need a truck that can handle high speeds and will be able to get the job done quickly. On the other hand, if you will be working on smaller jobs, you should look for a truck that is more compact.
Spray bar
The Howo asphalt distributor truck spray bar is an important tool in spreading asphalt. It enables you to spray and move the asphalt in a consistent manner, which is helpful in avoiding obstacles.
Depending on the model, the bar may have multiple nozzles mounted on it, and the height of the bar is variable. This is because the nozzles have different sizes, and this allows you to achieve different application rates.
A slick way to do this is by using a deflector nozzle, which can be adjusted to give you a straight, sharp edge of coverage. But, you can also achieve this by using a few smaller nozzles.
To get the most out of your asphalt, you should know the difference between a good spray bar and a bad one. You should also know how to use the sprayer. Using the right nozzle will make the difference between a smooth, even spread and a mess. Similarly, you should use the right flow rate.
To determine the best spray bar for your needs, it's a good idea to check out the features of your asphalt distributor. Some distributors have a second spray bar, which is sometimes called a wheel path bar.
Other features you'll want to take note of are the control system and the hydraulic and pneumatic systems. The control system should be easy to understand and control, as well as be able to provide a safe, accurate and effective means of controlling the asphalt.
The hydraulic and pneumatic systems should also be able to provide you with a smooth and fast spreading.
Nozzles
Using the right spray bar nozzles is important for ensuring uniform application. Properly aligned nozzles will improve the performance of your asphalt distributor.
When the operator turns on the spray bar, the nozzles are usually raised and turned outward. The nozzles should be oriented properly to avoid damage to the surface of the asphalt. In the case of irregular surfaces, a few nozzles may be closed off.
For proper spraying, the height of the spray bar should be set according to the manufacturer's recommendations. It is usually measured at several points along the width of the bar. A good rule of thumb is to use 10 to 14-foot spray bars.
Using the proper width for the application of the asphalt is also important. This depends on the type of product being sprayed. Most distributors have a spray bar that is twelve feet wide. However, some manufacturers offer additional widths.
If the spray bar is damaged, it may cause an uneven coverage of the product. Moreover, the nozzles can be clogged with dirt or debris. To prevent this, it is recommended to clean the filters.
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An asphalt distributor has a control system that enables the operator to adjust the spraying width. The control system also determines the rotation speed of the asphalt pump and controls the quantity of asphalt sprayed.
The control system has a touch display that records the total amount sprayed. Some distributors also include a separate computer that controls the second spray bar.
Asphalt distributors can be controlled by the operator or by a remote control. With an intelligent control system, the spraying width is automatically adjusted.
Circulate asphalt throughout the tank
Howo asphalt distributor truck tanks are designed to store oil-based materials such as bitumen emulsions. A number of features are built into the tank to prevent it from becoming contaminated. In addition to the features mentioned, some models also include a thermocouple inside the tank. This device can be used to monitor the temperature of the asphalt.
An infrared thermometer can also be used to verify the temperature of the asphalt. The range should be less than 100 degF to at least 400 degF. If the thermometer is located outside the tank, it can be positioned in a well. It should be covered with a lid to prevent it from being knocked off.
There are two systems commonly used to supply pressure to the spray circulation system. One system uses a separate engine mounted at the rear of the tank.
A second system recirculates asphalt in the tank. Both systems include a directional control valve and a pressure relief valve. However, a preferred embodiment of the present invention includes the directional control valve and the pressure relief valve in a single valve body.
In a preferred embodiment of the present invention, the pressure relief valve is connected to the return conduit. When the directional control valve is not in operation, the pressure relief valve opens, allowing the asphalt to flow through the return conduit.
In addition to the directional control valve and the pressure relief control, the circulating system is powered by a power-driven pump. A coaxial feed line assembly is disposed between the pump and the tank to limit the exposure of plumbing.
Properly connect hoses, joints and pipes
To correctly operate an asphalt distributor, one must consider the myriad parts. The best practice is to visually inspect the unit before filling it up. It is unlikely that you will find a distributor that has been used for many years with no modifications, which is why it is important to keep up with the latest developments.
A quick tour of the unit will reveal numerous special purpose attachments. You will also notice the numerous hoses, hose tethers, and tube supports. These items must be properly secured to avoid rubbing against sharp edges. There are also two systems to choose from, the most common being the hydrostatic distributor. This system uses a truck engine to pump the asphalt from a tank at the rear of the vehicle.
It is not uncommon for a single distributor to spray out more than a gallon of asphalt per minute. This may be attributed to the unit being mishandled or to the tank leaking as it is pumped full. One of the better ways to prevent this is to keep the temperature of the asphalt in the distributor well below 140 degrees F. Also consider the fact that hot asphalt can turn a tank of water into steam. Fortunately, these problems can be avoided with the proper maintenance.
With any luck, you are able to safely and efficiently perform the task of spreading asphalt on your local roadway. However, you can never be too careful. If you don't take the proper precautions, the resulting mess could cause you to miss your next job or even worse, incur the wrath of an unwelcomed customer.
Maintain a constant asphalt temperature
The Howo asphalt distributor truck has strong adaptability and excellent insulation. It also has a very good carrying capacity. Therefore, it can be used for different kinds of projects. However, its performance is still affected by its maintenance.
A properly maintained and calibrated asphalt distributor is very important for achieving a consistent application of the product. This will ensure that the tack coat applied on the pavement will adhere well and reduce the possibility of surface-course sliding.
In order to achieve a consistent application, the nozzles of the asphalt distributor must be aligned correctly. There are various types of nozzles available for the asphalt distributor. These include fan-shaped nozzles, wheelpath bar nozzles, and a second spray bar. Each has a different size opening to allow for the application of the product at a certain rate.
Asphalt distributors are powered by a power-driven pump. This pump is responsible for circulating the asphalt binder throughout the truck. As a result, the temperature of the binder is kept at the correct level.
Some models come with a thermocouple inside the tank. Others have a dial-type thermometer on the outside. Either type is suitable for measuring the temperature of the asphalt. You can also use an infrared thermometer to check the temperature of the asphalt.
During the construction process, asphalt temperatures are subject to a drop. This will vary according to the materials and the used technics. An electric heater can help improve productivity and safety. Electric heat is gaining popularity among contractors.
Traditional distributor trucks heat material with burners that operate on diesel or LP gas. However, this may not be a safe way of heating the asphalt. Furthermore, the crew must wait up to an hour before the material reaches the desired temperature.