(1) External leakage is blocked, internal leakage is easy to control, and safety is used. Internal and external leaks are elements that endanger safety. Other self-control valves usually extend the valve stem and the spool, which is controlled by the electric, pneumatic and hydraulic actuators, can rotate or move. This must solve the problem of external leakage of the valve stem dynamic seal during long-term operation; only the solenoid valve is operated by the electromagnetic force acting on the core sealed in the magnetic isolation sleeve of the electric control valve. There is no dynamic seal, so the leakage is easy to block. .
(2) The system is simple, then it is connected to the computer, the price is low and modest. The solenoid valve itself has a simple structure and a low price, and is easier to install and maintain than other types of actuators such as regulating valves. What is even more remarkable is that the self-contained system is much simpler and the price is much lower. Because the solenoid valve is a switch signal control, it is very convenient to connect with the industrial control computer. In today's era of widespread computer availability and sharply lower prices, the advantages of solenoid valves are even more pronounced.
(3) Action express, small power, light weight. Solenoid valve response time can be as short as several milliseconds, and even pilot solenoid valves can be controlled within tens of milliseconds. Due to self-looping, it reacts more sensitively than other self-controlled valves. Well-designed solenoid valve coil power consumption is very low, is an energy-saving product; can also be achieved simply trigger action, automatically maintain the valve position, usually no power at a time. The electromagnetic valve has a small size, which saves space and is light and beautiful.
(4) The adjustment accuracy is limited and the applicable medium is limited. Solenoid valve usually only two kinds of switch state, the valve can only be in two extreme positions, can not be continuously adjusted, (a lot of new ideas trying to break through, but are still in the experimental trial phase) so the adjustment accuracy is also subject to certain restrictions. Solenoid valves have high requirements for the cleanliness of the medium. The granular media cannot be applied. If impurities are present, they must be filtered out first. In addition, viscous media cannot be used, and the specific product is suitable for a relatively narrow range of media viscosity.
(5) Models are diverse and widely used. Although the solenoid valve is inherently inadequate, the advantages are still very prominent, so it is designed into a wide variety of products to meet a variety of different needs and uses are extremely wide.
Flap Disc
Flap disc, commonly known as flat emery cloth wheels, emery discs, flower impellers or elastic grinding discs, are a large variety of coated abrasive conversion products, which press the cut coated abrasive sheets one by one. It is formed by sticking adhesive to the back cover plate along the circumference. The flap disc are called strong elastic grinding discs. They are made of calcined emery cloth, which uses mesh, nylon, plastic, steel paper and other materials as the base. Attached abrasive tools, evenly distributed in a fan shape to ensure the best grinding effect. The particle size is 36#-320#, 60# and 80# are the most common, and the outer diameter is 4"-7" installed on the angle grinder. Angle grinders are mainly installed on hand-held Power Tools to polish and polish welds, burrs, chamfers, surface rust removal, and surface polishing of various metal and non-metal parts.
The flat emery cloth wheel (flap wheel) is formed by sticking multiple emery cloth sheets on the tray in a fan-shaped superimposed arrangement, and the bonding angle between each emery cloth and the tray plane is 10°-30°. The emery cloth arrangement of the utility model can make When the abrasive cloth wheel grinds and polishes the workpiece to be processed, the cutting angle is optimized to ensure that the base material of the abrasive cloth wheel and the grinding are consumed simultaneously, which obviously improves the overall wear resistance and grinding efficiency of the flat abrasive cloth wheel, and prolongs the service life of the abrasive cloth wheel. Grind the surface of metallic and non-metallic materials.
product advantages:
Compared with the resin grinding wheel for fixed abrasives, it has the advantages of polishing and polishing at one time, shortening the operation time, saving the grinding cost, high efficiency, good heat dissipation, high grinding efficiency, reducing operator fatigue, increasing machine life, etc. It has strong elasticity, High tensile and bending strength and good grinding effect. The grinding speed is fast, the effect is good, and the noise during grinding is low. It is suitable for various industries or fields of manufacturing such as major metal parts factories and machinery factories. Good weather resistance, salt spray resistance and heat resistance, suitable for use in different regions.
Scope of application:
It is suitable for polishing of stainless steel, metal, metallurgy, automobile, wood, marble and other industries. It is especially suitable for the processing of stainless steel and can replace the resin-shaped grinding wheel. It has strong elasticity, high tensile and bending strength, good self-sharpening, high grinding rate, and low noise. It is suitable for welding seams in the box. Polishing of the edges.
There are different classifications of louvers according to different angles. The following are two common classifications:
According to the appearance: T27 VS T29
Flap disc generally have two shapes, curved and flat.
The flap disc type is also called the T27 type, and the curved type generally refers to the T29 type.
The flap disc type (T27) has a flat surface. It is mainly used to polish the flat surface and the external edges and corners. The flap disc and the workpiece are angled during work, which can complete the grinding and polishing at one time, reducing the work flow.
The curved surface of the curved louver (T29) has an upward arc, which makes the T29 flap disc have a better cutting ability on the plane. When working, the T29 type grinding wheel forms an angle of 15° to 25° with the grinding surface, which is mainly used to deal with the grinding of contours and edges. When there are higher requirements for speed and cutting ability, T29 flap disc is undoubtedly the best choice.
The related abrasive products we can supply is Flap Disc Adhesive, bonded abrasives, and Abrasive Machine such as Flap Disc Making Machine,Abrasive Belt Making Machine, Flap Wheel Machine , Polishing Machine ,Sanding Disc Machine, if you have any needs about abrasive tools, please kindly feel free to contact us.
According to the type of abrasive particles: ceramic alumina VS zirconium corundum VS alumina
According to the type of abrasive selected, the flap disc can be divided into three types: ceramic alumina, zirconium corundum and alumina.
Because ceramic alumina itself has many crystals, it has good self-sharpening, relatively neat edges, good heat dissipation, and long service life. Therefore, ceramic alumina louvers are mainly used for the grinding of stainless steel, aluminum and other hard metals.
Zirconium corundum itself is a polycrystalline crystal, with fast cutting speed, good self-sharpening, and strong resistance to high pressure and high temperature. Therefore, zirconium corundum louver blades have strong cutting ability and long service life.
Alumina: single crystal, the cutting ability begins to decline at the beginning of grinding, and the abrasive grains are not easy to break, so the alumina flap disc is suitable for the processing of common metals.
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