The check valve is installed with the outlet of the hydraulic pump in order to:

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

The check valve is used to prevent the backflow of the medium, to prevent the pump and drive motor from reversing, and to vent the container medium.

Later, pressure gauges use elastic elements as sensitive elements to measure and indicate higher than ambient pressures, and are used in almost all industrial processes and scientific research fields.

It can be found everywhere in the fields of thermal pipe network, oil and gas transmission, water supply and gas supply system, vehicle repair and maintenance plant and shop.

Pumps can usually be divided into three categories: positive displacement pumps, power pumps, and other types of pumps according to their working principle. In addition to classification by working principle, it can also be classified and named by other methods.

For example, according to the drive method, it can be divided into electric pump and water wheel pump; According to the structure, it can be divided into single-stage pump and multi-stage pump; According to the use, it can be divided into boiler feed pump and metering pump, etc.; According to the nature of the conveyed liquid, it can be divided into water pump, oil pump and mud pump.

According to the shaft structure, it can be divided into linear pump and traditional pump. The water pump can only convey fluid-based logistics, not solids.

The direction of the arrow of the valve body of the hydraulic butterfly valve at the outlet of the water pump should be opposite to the cavity nucleus of the water outlet direction of the water pump. Here's why:

The hydraulic butterfly valve is to achieve flow regulation by hydraulically controlling the valve opening, in which the movement of the control valve is driven by the pressure difference between the front and rear of the valve, so as to control the flow and pressure. Therefore, the installation direction of the hydraulic butterfly valve should be opposite to the flow direction of the fluid, so that the flow and pressure can be better controlled, and the adjustment effect is better.

When the arrow of the valve body is in the same direction as the water outlet direction of the water pump, it is equivalent to facing the control valve port towards the water pump, which will interfere with the normal operation of the hydraulic butterfly valve, and will lead to inaccurate flow regulation, excessive pressure loss, increased system noise and other hazards.

If the pressure gauge is installed before the check valve, the normal pressure will only be displayed when the pump is running, and the pressure value displayed when the pump is stationary does not match the actual pressure of the pipeline.

If it is installed behind a check valve, the actual water pressure in the pipe will be displayed regardless of the operating status of the pump.

In order to facilitate the replacement, a small valve can be installed on the small pipe connected to the pressure gauge in the main pipe, and the small valve can be turned off when the pressure gauge is replaced.

It should be installed in front of the check valve, and it should be installed in the check valve for fear of being damaged by the water.

It should be after the valve of the outlet, because if there is damage, it can be easily replaced.

Why check valve design between the oil inlet chamber and the oil outlet chamber inside the electric pump of an electric gasoline pump Hello Pro The additional functions of the fuel pump are done by the safety valve and the check valve. In order to prevent the pressure of the fuel injection port from rising abnormally for some reason, when the working pressure of the oil pump rises to 400kpa, the safety valve is opened, and the oil outlet chamber of the gasoline pump is connected with the oil inlet chamber, and the gasoline is circulated in the pump to prevent the oil supply pressure from being too high.

Check Valve: A check valve is installed at the oil outlet of the gasoline pump to prevent a sudden drop in oil supply pressure when the engine stops running. When the engine is turned off, the gasoline pump stops rotating and the check valve closes, so that the fuel system maintains a certain residual pressure, which is convenient for the engine to start again.

The working principle is delayed: eccentric installation between the rotor with rollers and the pump body. The rollers in the rotor groove are pressed tightly against the surface of the pump body under the action of rotational inertia force.

Two adjacent rollers form an oil cavity with the inner surface of the pump. During the rotation of the rotor, the volume of the oil chamber is constantly changing. When turning to the inlet chamber, the volume increases, and gasoline is inhaled; When turning to the outlet chamber, the volume decreases, the pressure increases, and the gasoline is pumped out.

If my answer is helpful to you, please give a thumbs up (in the lower left corner), I look forward to your like, your efforts are very important to me, and your support is also the motivation for my progress. Finally, I wish you good health and a happy mood!

The working process of the hydraulic system of the reversing wheel attitude circuit of the cartridge valve when the 1ya is energized is: after the 1ya is energized, the reversing valve works on the left and the hydraulic cylinder advances. When 1ya is powered off and 2ya is energized, the hydraulic cylinder retreats.

As soon as the electromagnet is de-energized, its motion can be stopped. It can be seen that the circuit has the functions of starting, stopping and reversing at the same time, which is suitable for most hydraulic systems. The above is the process of the hydraulic system when 1ya is electrified.

The hydraulic system is mainly divided into transmission system and control system. A complete hydraulic system is composed of five parts, including power components, actuator components, control components, auxiliary components and hydraulic oil. The hydraulic system we often talk about is mainly used to transmit power and movement.

Answer]: C is based on the third section of the first chapter of the "Installation Textbook".

Fourth, the valve, should choose item C.

When the globe valve is not installed, it is necessary to pay attention to the "low in and high out" of the fluid, and the direction cannot be reversed.

Hello pro Why is it necessary to connect a relief valve in parallel between the hydraulic pump and the throttle valve in the hydraulic system that uses the quantitative pump: because the flow rate of the quantitative pump is constant, and the action speed of each hydraulic cylinder in the hydraulic system of the quantitative pump is different, so the throttle valve is used to control the speed of the cylinder. The required flow rate for cylinder action varies with the speed of the operation, and excess fluid usually flows back to the tank through the relief valve.