3. Small valves can choose needle valve, instrument valve, the sampling valve, pressure gauge valve, etc. 5. Synthetic industry produce in small fertilizer and chemical fertilizer appropriate chooses 16 mpa or PN320 PN160 nominal pressure, nominal pressure, nominal pressure of 32 mpa pressure Angle of the valve or pressure Angle by the valve. Because open or close the valve stem travel relatively short, and have very good truncation function, and because of the changes in the seat of his stroke proportional relationship with the disc, very suitable for traffic regulation. Speckle tube by the nominal pressure or pressure, PN1. 0 - 16. 0 mpa, ANSI CLASS150 - 900、JIS 10- 20 k, or nominal diameter diameter: DN10 ~ 500, NPS 1/2 ~ 36 ', as of the petition forms: flange, butt welding, turnbuckle, suit to use temperature: - 196 ℃ ~ 700 ℃, the valve drive form: manual, bevel gear drive, pneumatic, electric, hydraulic, pneumatic hydraulic linkage, electro-hydraulic linkage, valve body material: WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8, 304). 、CF3( 304L) 、CF8M( 316). 、CF3M( 316 l) 、Ti。 The valve is closed ( The disc) Along the core line movement of the valve seat. Based on disc this way of moving, the seat of his change is relation with directly proportional valve stroke. 。 Q: as of valve office principle and selection principle of answer: the most apparent strengths is: in the process of opening and closing, because the disc in the valve body tightly closed between the friction force is smaller than gate valves, and wear resistance. 6. Oxygen desilication in bayer process produces aluminum plant, coke easy knot Marine valves on the pipeline, easy to choose seat can be separated type, body place, carbide tightly closed vice once-through by valve or once-through by valve. Opening ordinary only a quarter of the seat channel diameter, because of the much smaller than gate valves. Because of this, this type of valve is very adapt to as truncation or adjustment and throttling. By the end of valve selection principle is: 1. The medium of high temperature, high pressure pipe or device appropriate chooses by the valve. Typically on the valve body and disc is only one tightly closed surface, thus making craft is better, easy to maintenance. Think of pressure loss problems small place. 2. Convection resistance is relaxed on the pipeline on the pipeline. Such as power plants, nuclear power stations, chemical fuel system of high temperature and high pressure piping. 4. Exchange flow adjustment or pressure adjustment, precision demand is not high, and the pipe diameter is small, such as nominal drift diameter of 50 mm or less piping, appropriate chooses. Into as of the valve and the use of different materials, can be suitable for use in water, steam, oil, acid, nitrate CH3COOH, oxygen, ammonium nitrate, and other media. 7. City water supply, heat supply engineering in construction, nominal menstruation smaller pipe, can be used by the valve, balanced valve or plunger valve, the pipeline such as nominal drift diameter less than 150 mm. Notes to the order: The national standard) A, A: B: product name, model, nominal size medium and temperature, pressure range C: whether there is attachment, delivery time, and special requirements so that we can correct selection for you. Second, if the valve has been selected by design unit of our company model, please order according to the valves parameters directly with our sales center. Three, it is very important when you use the occasion or the environment is more complex, would you please provide design drawings and detailed parameters, our engineers experts will concentrate on review and analysis for you. We can provide you with professional solutions, including design, customization, complete, operation and service. We've been working on the valve leader in the field of industry, to provide you with the latest knowledge of the Industrial Valves, the best service, best technical adviser. Thank you for visiting our website, if you have any questions, you can call us, we will be dedicated to provide you with quality services. The factory provides professional ball valve, butterfly valve, gate valve, globe valve, check valve, relief valve, safety valve, Marine valve, oil valve, hydraulic control valve and other kinds of valves.
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