Chemical Pump Choice Guide – Material and Structural

Corrosion has continually been one in all the foremost headache hazards of chemical instrumentation. A bit carelessness could injury the instrumentation, or perhaps cause accidents or perhaps disasters. Per relevant statistics, regarding hr of YANESS pumps' injury to chemical instrumentation is caused by corrosion. Therefore, {the choice|the choice} of chemical pumps should initial listen to the scientific of fabric selection. There’s sometimes a misunderstanding that chromes steel could be a "universal material". It’s terribly dangerous to pump chrome steel pumps in spite of the medium, chemical pump and environmental conditions. Here area unit some key points for choosing materials for a few usually used chemical media:

The material and choice guide of chemical pumps.

1. Oil of vitriol is one in all the robust corrosive media. Oil of vitriol is a vital industrial staple with a good vary of uses. Oil of vitriol with completely different concentrations and temperatures encompasses a giant distinction within the pump corrosion of rot brine chemical change. For focused oil of vitriol with a degree of over eightieth and a temperature of but eighty ° C, steel and forged iron have smart corrosion resistance, however it's not appropriate for prime speeds. Flowing oil of vitriol isn't appropriate as a fabric for pump valves; normal untarnished steels like 304 (0Cr self-priming pump 18Ni9) and 316 (0Cr18Ni12Mo2Ti) have restricted uses for oil of vitriol media. Therefore, the pump valve for oil of vitriol is sometimes product of high Si forged iron (difficult to solid and process) and high alloy chrome steel (No. 20 alloy). Fluoroplastics have higher resistance to oil of vitriol, and employing a fluorine-lined pump (F46) could be an additional economical choice.

2. Acid. Most metal materials don't seem to be proof against acid corrosion (including varied chrome steel materials). Molybdenum-containing high-silicon iron will solely be used for acid below fifty ° C and half-hour. In distinction to bi metal materials, most non-metallic materials have smart corrosion resistance to acid, thus rubber-lined rubber pumps and plastic pumps (such as plastic, fluoroplastics, etc.) area unit the most effective selection for transporting acid.

3. Most of acid general metals’ area unit quickly unsound in acid to break screw pumps. Chrome steel is the most generally used acid resistant material. It’s smart corrosion resistance to any or all concentrations of acid at temperature. it's value mentioning that the corrosion resistance of molybdenum-containing chrome steel (such as 316, 316L) to acid isn't solely higher than that of normal chrome steel (such as 304, 321), and typically even worse. For high-temperature acid, atomic number 22 and atomic number 22 alloy materials area unit sometimes used.

4. Carboxylic acid is one in all the foremost corrosive substances in organic acids. Normal steel are going to be severely unsound in carboxylic acid in the slightest degree concentrations and temperatures. Chrome steel is a superb carboxylic acid resistant material, containing Mo. 316 chrome steel is additionally appropriate for prime temperature and dilute carboxylic acid steam. For severe needs like to hot temperature and a high concentration of carboxylic acid or containing alternative corrosive media, high alloy chrome steel pumps or fluoroplastic pumps will be elite.

5. Alkali (sodium hydroxide) steel is wide utilized in caustic soda solutions below eighty ° C and half-hour concentration, and lots of industrial submersible pump factories still operate at temperatures below a hundred ° C and seventy-fifth. With normal steel, though the corrosion is hyperbolic, the economy is sweet. The corrosion resistance of normal chrome steel to caustic has no obvious benefits compared to forge iron. As long as a little quantity of iron is allowed to be mixed within the medium, chrome steel isn't suggested. For prime temperature caustic, atomic number 22 and atomic number 22 alloys or high alloy chrome steel area unit is principally used.

6. Ammonia (ammonium hydroxide) Most metals and non-metals area unit slightly unsound in liquid ammonia and ammonia (ammonia hydroxide). Solely copper and copper alloys shouldn't be used. Most of the company's merchandise area unit appropriate for the transportation of ammonia and ammonium hydroxide.

7. H2O (seawater) normal steel isn't terribly corrosive in binary compound answer, brine and salty water, and it's typically necessary to use paint protection; varied sorts of chrome steel even have terribly low uniform corrosion rates. However, it's going to cause native corrosion because of chloride ions. Generally, 316 chrome steel is most well-liked. The company's varied chemical pumps area unit equipped with 316 materials.

8. Common alcohol-based chemical pumps like alcohols, ketones, esters, and ethers embody methyl alcohol, ethanol, glycol, and alcohol. Ketones embody solvent and group. Ketones, etc., organic compound media embody varied alkyl group esters, ethyl radical esters, etc. Ether media embody alkyl group ether, ether, group ether, etc. they're essentially non-corrosive, and usually used materials will be used. Specific choice ought to even be supported the properties of the medium and relevant needs to create an affordable selection. It’s additionally value noting that ketones, esters, and ethers have solubility during a form of rubbers, and avoid errors once selecting stuff.

There are many other media that cannot be introduced here one by one. In short, you must not be random and blind when selecting materials. You should consult more relevant information or draw on mature experience.

Chemical canned pump structure (product overview)

The chemical canned motor pump is a vertical pipeline chemical canned motor pump, which is mainly composed of pump body, impeller, and canned motor. It adopts a new static seal structure to prevent water from leaking and ensure that the working environment is not polluted. It is mainly suitable for petroleum, chemical and textile industries. Printing and dyeing, pharmaceutical, food, metallurgy, power stations and atomic energy transport corrosive media and media with special requirements.

Structure of Chemical Canned Motor Pump (Product Features)

1. High efficiency and energy saving: CFD is used to calculate fluid dynamics, analyze and calculate the relationship between the pressure distribution and speed distribution of the centrifugal pump in the pump, optimize the design of the flow channel of the pump, ensure that the pump has an efficient hydraulic profile, and improve the efficiency of the pump.

2. Static seal structure: The motor is a shielded motor, and there is no dynamic seal, so that no dripping water is leaked to ensure that the working environment is not polluted;

3. Low noise: Adopts the quiet noise design method to reduce noise pollution, and the noise is 3 to 5% lower than that of general pipeline pumps;

4, Easy installation and maintenance: Pipeline design, the same diameter of the inlet and outlet and in a straight line, easy installation and maintenance, daily maintenance is very simple;

5. Good performance of the whole machine: Adopting advanced double-throttle ring balance method, the axial force balance effect is good, which can effectively reduce the motor failure rate and improve the operation reliability; the balance accuracy is high, and the rotor component dynamic balance accuracy is G1.0 level;

6. New casting process: The flow parts of the DFLPH pump (such as pump body, impeller, pump cover, sealing ring, etc.) are precision cast with silicon melt glue, and the flow channel size is stable. After the casting is formed, the pickling process is used to remove the residue on the casting surface. Attachment, retains the nature of the metal, and will not affect the conveyed medium due to the casting attachment.

7. Explosion-proof structure: The motor is an explosion-proof motor, which is suitable for various flammable and explosive media transportation occasions.