Reducing costs are the goals of various industries and the valve industry is no exception. Some owners in the valve industry think that the design cost of valves greatly influences the overall co...,sex in wife
1. Liquefied natural gas
With the development of industry and the improvement of people's living standards, natural gas, especially liquefied natural gas has become the most indispensable high-qua...,jhony sins
When a natural gas company was inspecting and repairing the pipeline, it was found that some of the fastening screws of flanges of gate valves were broken. The gate valve is buried below&nbs...,jhony sins
xx comics,11. Why is the anti-blocking performance of control valves with straight strokes poor, while that of the rotary motion valve is good?
Valve spools of straight strokes throttle vertically, and t...
mundo porn,A valve is one of the indispensable devices in industrial production, and you may encounter many questions from selection, use to the maintenance of valves. Some common questions are listed in this ar...
xxx videp hd,Overview of soft sealing gate valves
A soft sealing gate valve is a manual valve used to connect media in water conservancy projects. A soft seal gate valve is composed of valve seats, valve bonnets, ...
Abstract: The harsh working conditions of high temperature oil slurry with catalyst particles and media containing hydrogen sulfide are introduced; the selection principles of dedicated...,teen gf fuck
A safety valve is an automatic valve that does not use any external force and uses the force of the medium to discharge a rated amount of fluid to prevent the pressure from exceeding the rated safe va...,df6 org xnxx
come porn,01. Pressure test methods for ball valves
The strength test of the pneumatic ball valve should be carried out with the ball half open.
① Floating ball valve tightness test: the valve is in a half-...
In general, industrial valves are not tested for strength during use, but the valve body and bonnet after repair or corroded body and bonnet should be tested for strength. For safety valves, the const...,prom x video
With the strengthening of China's environmental awareness and the change of energy structure, China's urban gas industry has made a great progress. The fuel gas types have evolved from simple ...,free cfnm
xxx asteliya,Corrosion is the destruction and deterioration of materials under various environmental conditions. Metallic corrosion is mainly caused by chemical corrosion and electrochemical corrosion. Non-metalli...
Design method of the split valve body of all-welded ball valves:
The valve body design of the all-welded ball valve has a cylindrical structure and a spherical structure, and the cylindrical st...,shemlae
1. The adjustment of opening pressure
1.1 Before the safety valve is delivered from the factory, the opening pressure should be adjusted one by one to the user's required setting value. If the us...,goku xxx
porn sex wap,The pressure-bearing valves of ground facilities and equipment in an oil field have experienced internal leakage due to wear, corrosion or other reasons. Because the internal leakage is difficult to f...
After a valve is used for a long time, the sealing surface of the valve disc and the valve seat will wear and the tightness will be affected. Repairing the sealing surface is a large and important tas...,xxx com 14
A self-operated regulating valve is also called a self-operated control valve. It is a new type of regulating valve. As the name implies, it does not need external power supply and secondary instrumen...,fdfs meaning
The installation of Relief Valves
Vertically installed relief valves at a feasible height along the wall or horizontally install them on permanent operating platform.
Practical steel should b...,mundo porn