Meds Medical Equipment Co.,Ltd

Ⅰ.Introduction

Spectroscopy is a technique used to identify and determine the physical characteristics of materials through the measurement of emissions and absorption of electromagnetic spectra.

“In our research we found quite upbeat predictions for near-term growth in spectroscopic instruments, rosier than what we see forecasted for the US economy as a whole – and the situation today looks somewhat gloomier than it did a few months ago when I finished the report,” said Charles Forman, author of the document. He added that research and development is key to growth in tech-oriented companies and that the increasing emphasis on detection of explosives, hazardous and volatile chemicals and the like will foster growth in handheld and other portable instruments for use in the field. In recent years, he said, good growth has been seen in instruments of this type, such as handheld Raman spectrometers.
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Materials
The majority of chemicals were supplied by Fisher Scientific UK and were all Anala Rgrade. Deionised water with an electronic resistance of 15 MΩ was used to preparestock and test solutions. The water was prepared by reverse osmosis using Purelab water purifier (ELGALabwater UK). Synthetic CaCO3 test solutions were prepared by mixing the appropriate amount of NaHCO3 and CaCl2.2H2O stock solutions, made by dissolving the chemicals in deionised water. The solutions were prepared fresh prior to each experiment. Stock solution of each metal (250 mg.l-1) was prepared and the chemicals used to make up these solutions were Zn(NO3)2 and CuSO4.

The operation manual of ME Jar__ tester.doc 1. First, run the company in the ME series of coagulation tests mixing instrument (coagulation test mixer) are using micro-computer control technology ...

1, the basic concept of low-temperature pump General reference to the use of low-temperature pump medium temperature slightly higher point of minus 30 ° C, low to minus 220 ° C, the designer should take into account the material's low temperature performance, impact resistance (mainly the Ak value), medium physical and chemical properties, in particular liquid nitrogen liquid oxygen liquid argon as the medium of volatile liquefied natural gas. Based on these performance considerations seal structure. Kind of pump is generally used packing seal. Seal relatively low cost. Low-temperature pump in the oil and chemical devices used to transport liquid hydrocarbons, liquefied natural gas,Split case pumps and refrigeration equipment in the liquid oxygen, liquid nitrogen and other liquefied gas special pump, it is also called cryogenic system. 2. Cryogenic pump type A. Piston, plunger Such pump is generally used in gas filling, chemical processes (like the chemical reaction kettle to join the high-pressure nitrogen, nitrogen dioxide, carbon dioxide, etc.), metallurgical engineering (steel mills, steel furnace gas, used as a pump , centrifugal flow generally notfire pumps large, but can provide gas supply pressure) B. Centrifugal Centrifugal cryogenic liquid pump Yi Ban Yong from a cryogenic liquid containers to a liquid delivery to another container, or as air separation in the De 流程 pump use (big 流量), this common sealed pump seal or use motorized the form of labyrinth seal, sealing a high cost. 3, the overall structural features Vertical structure: suitable for installation buried in the ground, is not affected by hot air motor, air temperatureVacuum pumps and sunshine, and other effects, easy to protect cold; to reduce the pump's suction on the height, the first increase perfusion and improve the effective NPSH; vertical structure also conducive to the exhaust, so that there is sufficient height to facilitate hoisting shaft seal device layout, so that the pump is also known as vertical cylinder-type pump. Symmetric structure: the overall structure of Oil pumpsthe pump symmetrically strive for uniformity in the cold state can be deformed. Double Shell: In order to ensure convenient and conducive to transmission of cold dangerous medium, usually made of double-shell, inner shell inside the pump pressure to bear, between the suction pressure inside the shell, so that the inner shell can reduce the intensity of the appropriate requirements. 2, seal Packing seal: Unlike an ordinary type, with double packing seal, between the two layers with a layer of the sealed chamber, access from outside a gas (eg nitrogen), sealed role. Mechanical Seal: mechanical seal are different from the ordinary type, with double end mechanical seal and pump in a In-line pumpssealed chamber with a buffer between the rooms, can be separated from the cooling effect, while allowing fluid pressure sealing arrangement to meet the fluid pressure changes, as This, generally with a constant voltage device, across the cold tank, ancillary equipment. 3, bearings: the bearings close to the atmospheric temperature, generally use the thrust ball bearings; under the bearings for the sliding bearings, immersed in the work of media operation, and with the working media for lubrication; in order to prevent friction and heat caused by the vaporization of liquid, resulting in destruction of lubrication must be good use of lubricating materials such as PTFE, graphite, corrosion of nickel alloy; and a journal bearing surface of the grinding or welding carbide nitride treatment.

  High pressure transfer pump to pump CO2, nitrogen, oxygen etc, from large (g type) high pressure gas cylinders to small cylinder
  At the moment our main markets are China Germany and America but we are always looking for new opportunities to broaden our horizons
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