Air Suspension System
The height control valve is sometimes also known as the trailer air leveling valve. The air suspension system is controlled by the height control valve by maintaining the optimal ride height between the carrying bed of the vehicle and the axles.
Better product quality
- In manufacturing, product quality is intricately related to consistency. No matter what you make, the product that comes off your line should be the same every time. If it isn't, you risk having to throw product away or disappointing customers, who have certain expectations.
- Consistency in your product relies on consistency in your process. You can't afford high levels of process variability — it needs to work the same way every time. This is exactly the job of your trailer air leveling valves. By having the right valve size and type installed on your lines and by keeping those valves in good working order, you reduce your process variability and, in turn, maintain consistently high product quality.
Higher levels of efficiency
Trailer air leveling valves make several contributions to the overall efficiency of your plant — in terms of both production and energy. First, by reducing process variability, they minimize waste. This means you have less to throw away across the entire line, from raw materials to finished products. Second, by precisely controlling process variables, trailer air leveling valves improve the energy efficiency of your plant. For example, by maintaining temperature control, they can improve your heating efficiency. These are just two examples. In reality, every step of your process provides an opportunity for greater efficiency. And the trailer air leveling valve is a key factor in achieving it.
Improved bottom line
By increasing your product quality and raising your efficiency, the humble trailer air leveling valve can have a huge impact on the profitability of your plant as a whole. Trailer air leveling valves that work properly also boost your environmental sustainability and decrease excess materials costs. What's not to love?
Valve sizing
- Many of the trailer air leveling valves in use today are oversized. This means that, under normal operating conditions, they operate at a low percentage of their rated flow capacity. Valve oversizing often happens for one of two reasons.
- The engineers don't have enough information or have the right information when designing the process to select the ideal valve, or The valve was oversized deliberately to leave room for process adjustments in the future.
- Regardless of the reason, if your valve is too big, you lose your ability to control the process variable very precisely. This means you give up on the quality, efficiency, and profitability improvements trailer air leveling valves can bring.
Valve response time
- A valve's response time is how quickly it reaches its new position after it receives a signal to move. The faster a valve reaches position, particularly in response to small signal changes, the more precisely the process variable can be controlled. And, as we saw earlier, precise control is what counts most.
- When a valve doesn't move quickly, the result is known as “dead time.” this is the time between when the signal changes and when the valve gets to where it's supposed to go. Dead time is essentially lost time on your production line — it destabilizes your control, allowing process variability to sneak in.
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Excellent team
Our factory has professional technicians team and excellent sales team, which can help us to provide our clients good quality and perfect service.
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How Trailer Air Leveling Valve Works?
Trailer air leveling valve, namely automatic diverter valve, is a valve designed to replace the mechanical system that maintains the balance ratio between the lifting and rotating movements of the front loader boom and bucket pistons.
Double Automatic Level valve is designed to be used in open center, closed center and load sensing systems. It can also be used with parallel or serial circuit valves. When connected to the parallel circuit valve, the system can self-balance or operate boom and bucket individually. When the trailer air leveling valve is installed in a system that uses a serial circuit valve, the boom reel must be upward from the bucket reel for the balancing valve to work properly. Loader control valve measurement and timing are important in ensuring good boom and bucket control in both conventional and self-leveling systems. The boom cylinder cavitation lags behind the "Entry to the Job Entry" measurement and the "Return to Work Area" measurement in the boom sub mode. Helps boom / bucket design to optimize attachment balancing using valves inside. If you have an application problem, let us help you solve it.
When the bucket roller is in the “neutral” and boom roller lift position, it enters flow B through the control valve. Port and outlet of the double level valve. Port of the double level valve to the head port of the boom cylinder. As the boom cylinder extends, the flow from the rod port is directed to the "C" port of the double level valve. The flow inlet port "C" can pass through the adjustable hole in the flow divider roller. The rate of flow division is determined by the adjustable hole size. Part of the flow, port E, bucket cylinder. The remaining flow passes from the “D” port to the control valve going back to the tank. The pressure in the bucket E port is directed through the cylinder elongate discharge roller and from the D port to the F port, which goes from the D port to the tank when the slide moves the discharge reel to allow flow from the rod end of the bucket.
Other Factors Affecting Trailer Air Leveling Valve Size Selection
Flashing and cavitation
Any time there is risk of flashing and cavitation it can and should be factored into the sizing calculations and selection criteria. Cavitation creates noise and vibration and can cause a lot of damage to the internal parts of a trailer air leveling valve and the pipes downstream.
In rotary trailer air leveling valves predicting the level of cavitation that will cause damage requires more than a simple calculation. Localized areas of pressure drop followed by recovery may cause cavitation way below the threshold that causes the flow to be fully choked.
Choked flow
With flashing and cavitation comes the added problem of choking. Flashing, or the formation of vapor bubbles just past the vena contracta, limits or chokes the flow through the trailer air leveling valve. If the downstream pressure drops past the point of flashing, the flow will become choked.
The basic liquid trailer air leveling valve sizing equation must be modified based on this pressure differential and using a trailer air leveling valve recovery coefficient.
Separate calculations are needed to determine the pressure at which cavitation will occur and choked flow will begin.
Viscosity
When dealing with the added friction of a highly viscous liquid, the trailer air leveling valve sizing coefficient needs to be increased. Viscosity is only an issue when it exceeds 40 centistokes or when the trailer air leveling valves are to be very small with a trailer air leveling valve sizing coefficient of less than 0.1.
When either of these situations exists, additional factors and calculations have to be figured into the equation.
Noise
High noise levels cause vibration which may damage pipes as well as other equipment. Noise levels are even more likely to exceed standards in steam and gas service (even when the pressure drop isn't extreme), especially as the trailer air leveling valve and pipe size increases.
Noise should be considered in the calculations for selecting and sizing control trailer air leveling valves, particularly for oil and gas service.
Flow characteristic
The flow characteristic, or the relationship between the trailer air leveling valve stem travel and the flow through the trailer air leveling valve, typically should be linear (when plotted on a chart). The inherent flow characteristic (which comes from the manufacturer) usually changes once put into operation. Things such as drops in pressure choked flow (flashing and cavitation), and location of the trailer air leveling valve within the system will have an impact on the flow characteristic.
The actual flow once installed, referred to as the installed flow characteristic, will be hard to control if it has strayed too far from a linear flow.
Computer analysis to determine control trailer air leveling valve size
All this being said, it is important and useful to understand the how and why of trailer air leveling valve selection, but to fully cover the sizing of control trailer air leveling valves requires a small textbook or at the least, a large user manual.
How to Choose a Trailer Air Leveling Valve
Application Conditions
Choosing the right valve size is one of the most critical steps in selecting a valve for your applications. A small or big valve can lead to operational issues within the valve or elsewhere in the system. You also want to know the flow rate, pressure, and temperature at which the valve will operate. Metal valves are more likely to withstand high pressure and temperatures than plastic ones.
Valve Differential Pressure
The trailer air leveling valve pressure loss rate in a piping system can be a big challenge. As the rate of the valve's differential pressure reduces relative to the overall pressure loss of the entire system, the installed flow characteristics shift away from inherent flow characteristics. While it is almost impossible to generalize, the PR value between 0.3 and 0.5 is a perfect choice.
Shut-off Pressure
The differential pressure value in the trailer air leveling valve shut-off time is critical data. You can use it in choosing the actuator and ensuring a solid design for every part of the trailer air leveling valve. You can achieve different designs by setting the intake pressure equal to the maximum shut-off pressure. However, this method can result in over-specification of the valves. Therefore, it's necessary to consider actual use conditions when determining the shut-off pressure.
Valve Function or Purpose
You should determine the purpose of your valve before making the final decision. Two-way valves are great for on/off control in a system, while the 3-way valves are best used for on/off control and mixing or diverting media. Additionally, you want to determine if your valve will remain open or closed most of the time.
Company Introduction
Zhuji Juntai Auto Spare Parts Co.,Ltd. was established in 2011 and located in Zhuji City, Zhejiang Province, China. Our factory has professional technicians team and excellent sales team, which can help us to provide our clients good quality and perfect service.
Our two main products are: Brake valves such as clutch servos, air dryer, levelling valves and some other valves; Lubrication system parts like grease gun, fittings and valve.
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