Shanghai Yonglong Valve Factory introduced QDQ series 3 gas shut-off valve, the valve combines the advantages of the globe valve, check valve, solenoid valve and pneumatic valve. The valve body adopts the stop valve structure, the medium is advanced and lowered, and the principle of backflow closure using the check valve is adopted to reduce the damage of the valve caused by the pipeline pressure being too high. The valve can be controlled by electrical and gas double control. Gas shut-off valve structure is simple, responsive, reliable and so on. Reduce the manufacturing process, beautiful appearance, greatly reducing the weight of the product, thus drastically reducing manufacturing costs. The ball valve structure is reasonable, less leakage point, the processing technology is simple, the material dropped significantly, the overall performance is higher. Features: Gas shut-off valve consists of multi-spring pneumatic actuator or floating piston actuator and regulating valve composition, the receiver to adjust the instrument signal to control the process of pipe fluid cut off, connected or switched. Can be widely used in petroleum, chemical, metallurgical and other industrial sectors. Gas source requires filtered compressed air or nitrogen, the medium flowing through the valve body should be free of impurities and no particles of gas. Working principle: 1. Shut-off valve gas source inlet installed by a two-position three-way solenoid valve, the remote electrical console can be used to control the valve switch. 2. Gas leak alarm alarm power, the solenoid valve power exhaust, the valve automatically shut down. 3. Manually control the solenoid valve (press the red clip) exhaust, the valve automatically shut down. Performance Specifications: Pressure Rating: 1.6 / 4.0Mpa Cylinder work Pressure: ≤2.0Mpa Operating temperature: -40 ~ +80 ℃ Cylinder use of the media: nitrogen `anhydrous air Medium: natural gas, liquefied gas, gas Fusing time: ± 70 ℃ Closing time: ≤ 5 seconds Cylinder opening pressure: ≥ 0.3-0 .6 Mpa Body: cast just, stainless steel. 304,316,316 L Spring: 50CrVA (spring steel) Cylinder, Piston: Ductile iron O-ring: Teflon, NBR Type of safety: Normally open, normally closed Electrical protection class: CEI IP65 / IP67 Explosion-proof grade: Eexm Ⅱ T4 / Eexm Ⅱ T5 Working voltage and electric power: AC24V or 220V, 50Hz / 14V; DC12V / 8.5W DC, AC24V / 8.5W
CBN Cutting Discs
CBN abrasive is mainly used for steel parts, such as high speed steel, die steel, 45 steel, etc., can be made into electroplating CBN, resin CBN, sintered CBN. Can be made into grinding wheel, cutting pieces, grinding head. Abrasive sharp, high temperature resistance, good thermal stability, wear resistance. The hardness of CBN is higher than that of ordinary abrasives and the ability to maintain shape is one of the main characteristics of high performance abrasives. CBN is very resistant to pressure. CBN has good thermal conductivity and can achieve cold cutting during grinding.
strong wear resistance, long life
The grinding ratio of CBN wheel can reach 3500-5500, which is 100 times higher than that of ordinary corundum wheel and 3-5 times higher than that of diamond wheel.
environmental protection, no pollution, energy saving and consumption reduction
No too much powder dust.
High work efficiency and good comprehensive economic benefits
The grinding is sharp, the grinding force is small, the dressing cycle of CBN wheel is long, the dressing amount is less, and the replacement time is long. Long service cycle, high grinding ratio, can obtain better economy, good shape retention in use, do not need to change and trim grinding wheel often, save working hours, improve working conditions, is conducive to machining operation.
Cubic boron nitride is not suitable for grinding hard metals and non-metallic materials. At high grinding temperature, CBN will react with alkaline aqueous solution. CBN grinding wheel will decompose in alkaline solution at 300℃, and can decompose in trace amount in boiling water, which will destroy the crystal shape of grinding grains. Therefore, oily coolant should be used instead of water-based coolant during grinding.
Cbn Cutting Discs,Flap Disc,Grinding Disc,Cbn Cutting Blade
Henan Jinlun Superhard Material Co., Ltd , https://www.jlsuperhard.com