How metering valve Works

metering valve

A metering valve is an appliance which is found in the braking system of a vehicle that has a front disc brakes and rear drum brakes. The distribution of pressure to the brakes is being controlled by the valves so as to stabilize the car when the brake is applied thereby increasing the braking and making braking safer. The metering valves can be located at different points where there is a braking system based on the model and maker, and may also be a part of a combination valve which is bigger and can be used for pressure regulation within the hydraulic braking system.

When the brakes are marched in a car, the hydraulic system will be activated and the pressure at their feet will be multiplied.

When you match the brake with little effort, such would be translated into a substantial pressure within the entire system which will make people to either slow or stop a car.

In a car with rear drum brakes and front disc brakes, in an event whereby the pressure coming from the brake goes straight to the brakes, the first one to be activated would be the front brakes and this might not be able to stop the car.
If it is the front brakes that work first, there is a possibility that the front of the car could fishtail or develop other form of stability problem. If there is a metering valve in a car, the valve would divert all the initial pressure to the rear brakes, and immediately they are in place, the pressure can be released to the front brakes so as to equalize the pressure. All this process occurs quickly and you will have the feeling that the brakes are working together at the same time.
The metering valves which are designed in a car compensate because the disc brakes are more sensitive and activate faster. You may not need a metering valve in a car which has other kinds of brake system, or another kind of system will be utilized to control braking pressure so that it can be applied by the driver safely. A series of interconnected system helps the working of the metering valves so as to keep the brakes working properly and smoothly whenever the need arises.
The mechanic can check the metering valve when checking the brake so as to confirm whether it is working perfectly or not. The valve can then be cleaned and replaced if necessary. It is also essential to note that you have to drain the valve completely and also clean it when flushing the brake system, and to ensure other components of the braking system are properly reconnected after the work is completed. Special consideration may be needed in some cars due to the presence of uniquefeatures,this may include features which are aimed to enhance the safety as well as efficiency.
The design of metering valve is aimed at providing accurate as well as stable control of the flow rates in the research applications and analytical instrumentation. The valve which will have the ability to control the flow of fluid must have an infinite positioning and variable control. A needle valve is also a kind of metering valve. The metering valves momentarily delay the application of the front disc brakes in an automotive hydraulic braking system until the brake of the rear drum start to act. The metering valves are valves which have multiple turns of valves and are designed so as to regulate the flow of fluid. These valves likewise have a low flow rate as well as a high differential pressure.
The hydraulic resistors are used to distribute the metering valves and the factors listed below affect the metered quantity:

  • Pump pressure
  • Geometry of the centralized lubrication system
  • Operating viscosity of the oil
  • Black pressure downstream of the metering valve distributor

A piston pumps is used for the operation of a metering valve and helps in the distribution of the total volume of the pump throughout the whole system with the entire delivery stroke. So that the lubricant would beused as desired, it is essential for the pressure which is loss in the tubing to be lower than that of the hydraulic resistance of the metering valves. There are various designs of hydraulic metering which is perfect for handling respective quantity as well as viscosity, they include:

  • A felt insert or sinter insert
  • A rectangular cross section (helical shape)
  • A fine annular gap

Apart from the metering valve which isnon-adjustable, there are adjustable kinds of metering valve which give the ability to regulate the rate of flow individually. The distributor of metering valve is utilized for the total loss of lubrication systems as well as the lubrication systems which is in circulation.
The skillful design of the metering valves helps to achieve the right amount to the right place and at the same time. The metering valve can be used with oil and can be used in most of the applications.
The outlet and inletdosage chamber are shut alternatively and opened with a pin valve that has a pneumatic control. The volume of the dosage chamber can be adjusted continuously with the aid of a screw adjustment which can be locked. A feeder pump pressure is used for the ejection of the medium. The use of glydrings as well as modern sealing components ensures a long lifetime of the metering valve even with the presence of high pressure input which is about 200 bars and when it is used along with grease which contains solid particles. A range of valves whose sizes ranges from 1 mm³ up to 500 cm³ will help in meeting the lubrication technique requirements in a cost effective way.

Metering valve with sensor

The position of a magnetic field sensor helps in the detection of the motion of the metering piston as well as the ejection of the lubricant. The signal of the output shows that the transfer of the lubricant has been completed.
Whenever there is a missing signal, it implies that there is a lack of lubricant flow or other forms of failure. This dosage sensor signal will allow for a simple process monitoring and the design which is very rugged will ensure it is durable.

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