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Widespread use of the valve industry, metal valves, metal valves for use has been a century of history, although the metal valve through the improvement of the structure and materials, ceramic valve, but limited by the properties of metal materials can not meet the growing high wear, corrosion and other harsh conditions strong demand, mainly in short service life, greatly affected the disclosure of a serious system stability. Traditional metal valves needed from materials, design and manufacturing processes, etc. overhaul.
Ceramic materials for industrial valves is a bold and useful innovation. Deformation of ceramic materials is very small, much higher than the metal with a combination of strength, generally composed of ceramic materials crystal ionic radius, and ion price high, a large coordination number, these properties determine the tensile strength of ceramic materials , compressive strength, elastic modulus, hardness and so very high. Ceramic itself, however, the “brittle” and difficult to machine limits its scope of application of the last decade, due to martensitic transformation toughening technology, composite materials and nano-ceramic Branch Technical development of the concept and progress has been made ceramics ” brittle, “has been greatly improved,
Its toughness and strength has been greatly improved, ever-expanding range of applications.
In recent years, new ceramic materials in petroleum, chemical, mechanical, and other fields is very active, using ceramic wear resistance, corrosion resistance and production of wear-resistant materials instead of metal corrosion Parts and Components, is an important market in recent years, hi-tech materials development directions.
industry valve pipeline control the flow of an important attachment medium, heavy on the valve of the practical applications notes, detailed reference section view principle and structure of information books,
Valve from the valve, opening and closing body, valve cover three major components, the second focuses on the structure of the company’s common valve characteristics and the proper use of notes.
industry valve 1, the role of industrial valves
1, open and close function - to cut off or the communication pipe and the fluid flow;
2, regulation - regulating the flow rate, flow rate;
3, saving role - so much fluid through the valve resulting from the pressure drop;
4, the other role - a. Automatically shuts b. c. maintain a certain pressure waste gas drainage.
Second, the types of industrial valves
1, according to zoning: cut off valves, regulating valves, diversion valves, valve type, valve type;
2 points by force: he moves with the valve, automatic valve function.
Third, the main parameters of industrial valves
PN nominal pressure (the maximum allowed by the pressure of fluid);
DN nominal diameter;
TN temperature range (to allow the fluid temperature range).
Fourth, industrial valve check before use
Inspection items include:
1, valve body inner and outer surface with or without trachoma, cracks and other defects;
2, valve seat and valve body junction is strong, whether the valve core and valve seat match, sealing surface for defects;
3, the stem and the valve connection is flexible and reliable, whether the stem bending, with or without thread damage, corrosion;
4, packing, gasket is old and broken;
5, the valve is open and flexible.
5, industry valve problems often use the process
1, with the pipe flange joints, thread leakage;
2, Han packing leakage, leakage and the valve stem to open lumbar pad fixed;
3, valve core and valve seat formed within the strict relations between the leakage.
6, the characteristics of valves commonly used in industry and the use of notes
The slurry industry has specific requirements when it comes to valves due to the corrosive and abrasive nature of the slurry particles and the subsequent wear on valve liners and discs.
GEMÜ Africa, has launched the company’s new butterfly valve specifically for use in the slurry sector. The valve offers a stainless steel disc and a polyurethane (PU) liner, both of which enhance the lifetime of the valve. Traditionally knife-gate valves have been seen as the solution for applications in the slurry sector, but the GEMÜ butterfly can be controlled more accurately.
The valves are competitively priced and the company offers full technical and spares support and free on-site trials, as well as access to global research and new technological development. All valves come with a standard warranty and accessories such as electrical position indicators and actuators. Manual or pneumatic/electrical actuators or gear box actuators are available for bigger sizes.
GEMÜ also offers a more traditional diaphragm valve also specifically manufactured for slurry use. A removable PU liner eliminates the need to replace the entire valve, offering savings to the user through reduced downtime and replacement costs.
Butterfly valve is widely utilized in metallurgy, power station,
petroleum, chemical industry, air, gas, water suply and drain tubing
line which of corrosive medium.
A hydraulic class valve is made
up by two valves body named left body and right body, screw rob, sealing
ring, lever, hydrocylinder and other parts. It has a rigid structure
consist of seat and back shaft. The body’s cylinders each has function
of clamp and flap. The two body completely loose and clamp drives by the
lever and screw rob in the clamp putter. Flap cylinder drives the plate
to open and close. Rubber sealing ring set in the plate has the
character of high temperature resistant, good sealing performance, easy
to replace and long time life service etc.
This valve can remote
controlled and manual operated in abnormal condition.
Sanitary Butterfly valve product offered byZhongquan Group Yongjia Kolink Valve Co., Ltd.
Nonrising stems are used where vertical space is limited or underground. The stem is threaded into the gate. As the hand wheel on the stem is rotated, the gate travels up or down the stem on the threads while the stem remains vertically stationary. This type of valve will almost always have a pointer indicator threaded onto the upper end of the stem to indicate the position of the gate.Brit Brothers, the company behind the new idea, has developed a saddle which allows the rider to roll their backside across the seat from side-to-side, through the use of toothed belts and tapered rollers.
From Brit Brothers:
For almost a century the motorcycle seat has seen little advance in either its design or function. And yet the modern rider experiences more movement across this area of the bike than any other. The result is a compromise, where each rider must learn to overcome its shortfalls by sacrificing aerodynamics and energy. To address this issue, the Brit Brothers have developed the ‘Chicane Saddle’ - A motorcycle racing seat designed to harmonize rider with machine. The innovative design incorporates toothed belts and tapered rollers which rotate under the riders weight. Combine this with inbuilt recoil and friction controls and you have a racing seat which can be individually tuned to the riders needs. The result allows the rider to achieve a smooth, arc-like, motion through corners and chicanes.
Aerodynamics:
When cornering on a fixed seat bike the rider is forced to rise up, and out of the aerodynamic bubble. This can slow down and unbalance the bike. Although modern riders train themselves to overcome this shortfall, it is, nonetheless, a shortfall. Our intention with the Chicane saddle is to allow the rider to remain in contact with the seat for longer periods, remaining inside the bikes aerodynamic bubble.
Rider Energy:
During the course of a race the rider uses valuable energy to shift their body weight through corners. Consequently the rider becomes increasingly tired and fatigued. By employing recoil and specifically placed rollers, the Chicane Saddle aids the transfer of body weight through corners by up to 20%. This leaves the rider stronger and prolongs endurance.
The High-Side:
A “High-Side is when the bikes rear wheel regains traction after spinning. The result can catapult the rider off of the bike. Because the Chicane Saddle allows longitudinal movement across the saddles surface it absorbs some of the aggressive sideways motion which occurs during a High-Side. We believe this might be the difference between the rider being able to catch the bike, or not.
So, what’s the verdict? Sound useful or just another way to spend an unnecessary wedge of cash?
Two recent contracts in China illustrate how waterworks and utilities are using butterfly valves to reduce energy use.
These particular butterfly valves are massive, with a diameter in excess of 10 feet, and have a working life of 30 years. In total, the deal is worth more than $2.2 million.
The advanced sealing and flexible open technology properties of the valves make them more energy efficient, according to a press release.
NF’s Chairman and CEO, Li Gang, said that the energy efficient flow control system will help secure water supplies for the upcoming Asian Games in Guangzhou.
Butterfly valves require less depth of cover during installation, and thus less concrete required to cover the valve chamber, with an accompanying reduction of CO2 emissions.
In another example, NF is supplying six sets of butterfly valves to a coal plant under construction in Zhejiang province. That deal is worth $550,000.
The new coal plant is one of a breed of so-called ultra-supercritical power plants designed to replace smaller, inefficient and pollution-belching plants.
BEIJING, Jan. 26 /PRNewswire-Asia/ — Frbiz.com, one of China’s leading B2B search platforms, analyzes China valve industry trend.
Valves are a low margin product, while market competition is fierce. The more commonly used valves are those used in the water treatment industry, which is mainly based on low-pressure valve products, such as butterfly valves, gate valves and check valves.
At present in China, the domestic backbone enterprises have been able to produce valves according to ISO international standards, DIN German Standards, AWWA standards of the United States and other international standards for design and manufacture of a variety of valves, and some manufacturers’ products has even reached international advanced levels. Although the overall level of the Chinese valve industry has been greatly improved, the quality is still not stable enough. In addition, our ability to complete the valve as compared with the developed countries is still worse. How to deal with the valve industry market competition?
Generally speaking, China’s valve market prices are relatively stable. Although every year there are slight movements, the range is small.
Frbiz analyzes China’s valve market trends:
First, building just turned to large-scale development, and so there is a need of big diameter and high pressure safety valves and pressure reducing valves.
Second, energy development aspect is focused on energy saving, and from the perspective of energy saving there is a move to develop the steam water valves .
Third, urban construction also needs to turn to energy saving and environmental protection direction transition, before the general use of low- pressure valves, in particular, is an iron-only low-pressure valve, and now to the environment-friendly plastic sheet valve, balance valve, metal sealed butterfly valve as well as the transition to middle sealing butterfly valve, oil and gas transmission pipeline projects gradually developed as the need for more flat gate valves and ball valves increased.