Ash discharge ball valve is evolved from the globe valve. It has the same rotary 90 degree lift action, except that the cock body is a sphere and has circular through-holes or channels through its axis.
In the closed position, the ball is pressed against the seat by mechanical pressure from the stem
Chemical industry is the most commonly used off valve, their main role is to connect and cut off the pipeline medium flow, although some of them can play the role of regulating the flow size, but they can not be used as a regulator valve
The product has good thermal insulation and cold characteristics, and the diameter of the valve and pipe diameter to, variable diameter, the medium is a straight line flow, low resistance, suitable for easy solidification, high viscosity liquid media. At the same time, it can effectively reduce the heat loss of intermediate pipe.
Material is not the same, high temperature ball valve generally used alloy valve body, this material is high temperature, corrosion resistance; Ordinary steel ball valves and copper ball valves are only rust proof, while the thermal deformation is relatively large.
Due to the particularity of coal chemical process, the smooth and safe operation of production is very important, among which the control valve is an important link
Ash discharge ball valve is evolved from the globe valve. It has the same rotary 90 degree lift action, except that the cock body is a sphere and has circular through-holes or channels through its axis
Ball valve was born in the 1950s, with the rapid development of science and technology, the continuous improvement of production process and product structure, in a short time of 50 years, has rapidly developed into a major valve class. In western industrially developed countries, the use of ball valves is increasing year by year.
Track ball valve and gate valve is the same type of valve, the difference is that its closing part is a ball, the ball around the center line of the valve body for rotation to open, close a valve.
Floating ball valve small volume, light weight, simple structure, ball with free floating function, can better ensure sealing; Ball valve is a ball with a circular through hole as the opening and closing parts, driven by the stem ball around the center of the stem for 0~90 degrees of rotation, to complete the opening and closing function
Ball valve is currently all the valve market, the most widely used a mechanical product, which is mainly composed of valve body, seat, ball, stem and transmission device, through the executive device to drive the ball core rotation, to achieve the function of switching or regulation
1. The opening and closing parts of the stop valve (Globe Valve) are plug shaped valves, the sealing surface is flat or conical, and the valves move in a straight line along the center line of the fluid. The movement form of the valve stem, there are lifting rod type (valve stem lifting, handwheel does not lift), there are also lifting rotary rod type (handwheel and valve stem rotating lifting together, nut in the valve body
The chemical industry generally uses the straight through valve, its flow resistance is small, usually selected as the cut-off and open medium valve, easy to adjust the flow of the valve as the control flow, plug valve and ball valve is more suitable for reversing shunt,
Oxygen valves Oxygen, nitrogen, hydrogen and oxygen valves are often used in physical chemistry experiments. In physical chemistry experiments, these gases are usually stored in special high-pressure gas cylinders.
Valves can be used to control air, water, steam, all kinds of corrosive media, mud, oil, liquid metal and radioactive media and other types of fluid flow. As it is very important to select the most suitable valve for the piping system, it is also very important to understand the characteristics of the valve and the steps and basis for selecting the valve.
When testing a newly built piping system, the pipes and valves are first tested: two leak tests, one 150% hydrostatic test and one N2He (nitrogen, helium) leak test. These tests cover not only the flanges connecting the valve to the pipe, but also the cover and body interfaces, as well as all cock/spire components in the body.
First, the use of the two is different, two, the composition of the classification is different, three, the requirements of the two are different
Now the main valve disc of the large unit is very large, and the main steam pressure is very high. When the door disc is opened, the pressure difference between the front and back of the valve is very large, which requires a large lifting force of the oil motor to open, so the size of the oil motor needs to be designed very large. Therefore, the main steam valve is provided with a pre-opening valve structure, the lifting force of the opening of the main valve will be reduced, so that the control..
Pressure reducing valve is widely used in fire water supply and automatic sprinkler system. Today, Xiaobian and everyone learn the working principle of pressure reducing valve and its setting requirements.
Daily maintenance of electric device. The maintenance of the electric device is generally not less than once a month. The maintenance contents include: the appearance should be clean, no dust accumulation, the device is not contaminated by soda and oil pollution; The sealing surface and point should be firm and tight. No leakage phenomenon; Lubrication parts should be according to the provisions of the oil, valve nut should be added grease; Electrical parts should be in good condition, no fault ..
