Pneumatic four way valve, but not in the form of a double L? The requirements are as follows 20

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 four-way ball valve can switch the flow direction of two media at the same time, which is convenient and fast, and realizes the effect of one valve for multiple purposes.

Pneumatic four-way valves must have detailed information to do.

The valve distribution mechanism is the control mechanism of the intake and exhaust pipes, which opens and closes the inlet and exhaust valves on time in accordance with the working sequence of the cylinder and the requirements of the working process, supplies combustible mixture (gasoline engine) or fresh air (diesel engine) to the cylinder and discharges the exhaust gas in time. In addition, when the intake and exhaust valves are closed, the cylinder is sealed.

1. Classification of gas distribution mechanism.

Composition of the valve mechanism.

Generally, the engine of the automobile adopts a valve-type valve mechanism, which is mainly composed of a valve group and a valve transmission group.

The valve group includes valves, valve guides, valve seats and valve springs and other parts, and some intake valves are also equipped with valve rotation mechanisms, and the valve group should ensure the tightness of the valve to the cylinder.

The valve transmission group mainly includes camshaft, timing gear, tappet and its duct, push rod, rocker arm and rocker shaft, etc., and its function is to make the intake and exhaust air according to the time specified in the gas distribution phase to open and close, and ensure that there is enough opening.

2. Classification of gas distribution mechanism.

According to the different valve installation positions, the valve train is divided into valve overhead valve mechanism and valve side valve mechanism.

The valve is located on the cylinder head, which is called the valve overhead valve mechanism, which consists of cams, tappets, push rods, rocker arms, valves, and valve springs, among others. Its characteristics, small intake resistance, compact combustion chamber structure, large air agitation, can achieve a high compression ratio, the current domestic automobile engines are using valve overhead valve mechanism.

The valve is located on the side of the cylinder block, which is called the valve side-mounted valve mechanism, which consists of cams, tappets, valves, and valve springs, etc. Alternative parts such as push rods and rocker arms are omitted, and the structure is simplified. Because its intake and exhaust valves are on one side of the cylinder, the compression ratio is limited, the intake and exhaust valve resistance is large, and the power and high speed of the engine are poor, and it is gradually eliminated.

3. Overhead camshaft valve mechanism.

Generally, the camshaft installation position of the engine has three forms: bottom, middle and top. Overhead camshafts are camshafts that are placed in the cylinder head, above the combustion chamber, and directly drive the rocker arm and valves, without having to pass through a long push rod.

Compared to a pushrod engine with the same number of valves (i.e., overhead valve structure), the overhead camshaft structure requires far fewer reciprocating components, thus greatly simplifying the valve structure, significantly reducing the weight of the engine, while also improving transmission efficiency and reducing operating noise.

According to the number of camshafts contained in the valve structure, overhead camshafts can be divided into the following two forms:

Single Overhead Camshaft (SOHC).

Double overhead camshafts (DOHC).

C In the valve mechanism, the valve is used to close the combustion chamber, so the C valve should be selected for this question.

The valve train is composed of camshafts, tappets, push rods, rocker arms, rocker arm shafts, valve springs and valve guides and other related components. Camshafts are arranged on the engine with bottom, side and overhead. Modern engines are often overhead-mounted, which is located on the cylinder head.

The camshaft drives the valve directly through the rocker arm, eliminating a large set of reciprocating parts such as tappets and push rods, which is very suitable for high-speed engines, but also brings the difficulty of the transmission shaft, because the camshaft is on the cylinder head, the cylinder head is more troublesome to disassemble and assemble, and the arrangement of the fuel injector is also more difficult. There is also an overhead type in which the camshaft is directly actuated by the spokes of the valve. The advantages of this form are not only simple mechanism, small inertia, and low requirements for camshafts, so it is widely used in new automobiles.

The function of the valve mechanism is to open and close the intake and exhaust valves of each cylinder regularly in accordance with the requirements of the working cycle and firing sequence in each cylinder of the engine, so that the fresh charge can enter the cylinder in time and the exhaust gas can be discharged from the cylinder in time; During the compression and expansion strokes, the sealing of the combustion chamber is ensured. Fresh charge is a combination of gasoline and air for a gasoline engine, and pure air for a diesel engine.

1. The driving mode is different, which is pneumatic drive and electric drive.

2. The opening and closing time is different, and the opening and closing time of the pneumatic ball valve and the pressure supply are normal in 1 second. The electric ball valve can be opened and closed in 30 seconds or more.

3,** Different, electric is definitely more expensive than pneumatic.

4. The cost and difficulty of later maintenance are different. Electric ball valves are more fragile than pneumatic ball valves and have higher maintenance costs.

The pneumatic four-way valve works on the original car fiber.

The solenoid valve is used to control the intake of the remote control reset cylinder, and the four-way solenoid valve is cut off before the overspeed spool valve is reset. In order to reset the overspeed spool valve, the solenoid valve is energized, one end of the cylinder is input to control the compressed air, and the other end is exhausted, when the air enters the cylinder, the live cherry plate plug and the connecting rod are pushed, so that the lever rotates, the half-closed overspeed sliding valve is opened, when the fast limit switch acts, the piston has reached the end point of its stroke, the overspeed sliding valve is reset, and then the solenoid valve cuts off the power supply, and the air enters the other end of the cylinder, so that the piston returns to its original position. The "Reset-Off" handle also returns to the "normal" position, and since then, the handle has remained in this position as long as the spool valve is still closed.