4. Pressure loss and flow capacity Pressure loss and flow capacity essentially have the same parameters. The pressure loss is the measurement of the fluid resistance and is the difference between the valve's inlet pressure and outlet pressure. With the given flow, pressure losses are determined...
2. Process conditions We must fully understand the process conditions of butterfly valves' process systems before we design butterfly valves, and the process conditions include media's types (gases, liquid, solid phase and two-phase, multiphase mixture, etc.), medium temperatures, medium pressure,...
An simple introduction of butterfly valves Butterfly valves are kinds of regulating valves that have simple structures, which can be applied to controlling flows of various fluids, such as air, water, steam, corrosive media, mud, oil products, liquid metal and radioactive media. Butterfly valves'...
The Performance of Ball Valves The ball channel of the ball valve is circular; the circular flow runner of the non-reduced ball is connected with the circular flow runner of the valve body, which forms a straight section. So the ball valve has small flow resistance. According to different working conditions,...
1. The harms of outer leakage There is no lack of inflammable, explosive, toxic, corrosive media in industrial production. The media entering the atmosphere through the outer leakage of valves will cause more damages than inner leakage. Reasons are as follows: If the media are corrosive...
1.Centerline butterfly valve A centerline butterfly valve features in the structure that the axle center of valve stem, valve disc and body are in the same position. It has simple structure and is easy to manufacture. The common-used rubber lined butterfly valve is also a sort of centerline butterfly...
Valve is a control unit in fluid conveying system, with functions of cut-off, regulation, guidance, pressure regulator, pressure relief, diversion and effusion, preventing the reverse flow, etc. All kinds of valves from the most simple globe valve to extremely complex and automatic control system have...
The materials and the quality of gas valves are so important that their disqualification will lead to leakage in-or-outside the body of the valve. If the strength, rigidity and overall performance of the components of the valve body cannot meet the requirements or even break, it will result in the spillage...
Butterfly valves, also called as flap valves, are a kind of valves having simple structure. Butterfly valves can also be used for low pressure pipelines to regulate media. The disc of butterfly valves is a plate, swinging with valve shaft to turn on or off valves. Butterfly valves are used for cutting...
Based on structure, ball valves are classified into following types: 1. Floating ball valves The ball of floating ball valves is floating. Under the pressure of medium, the ball can displace and compress on the sealing face of exit to ensure the sealing of exit. Floating ball valves have...