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CMI Porous Metal Instrument Filters
CMI Porous Metal Instrument Filters Today’s sensitive instruments are capable of detecting particles down to parts per trillion(ppt) levels. For the protection of critical instruments, and for the process that demand the highest purity, CMI porous metal instrument filters can provide good protections. With its good strength and precision, CMI porous metal products can give a long-lasting barrier against particles even when placed in harsh environments. Uniform porosity – A strictly controlled manufacturing pricess enables CMI to produce uniformly sized and distributed pores, in media grades ranging from 0.2 to 100. High Efficiency Particles Capture – Porous metal elements trap particles via “depth filtration”, the effect created by a labyrinth of tortuous, irregular paths leading from one side of the element to the other. This geometry traps particles far more efficiently than media containing straight channels between pores. High corrosion resistance – For applications involving corrosive gases or liquids, CMI instrument filters can be constructed of special corrosion-resistant metals, like titanium, which is one of our strongest material. High Temp. tolerance --- All metal construction, welded joint and seams, the proper material selection endure high temp, even in the midst of oxidizing atmospheres. SS material can be up to 600 degC, while titanium can be up to 280 deg C. High Pressure tolerance – Unlike “soft” media, and because of its rigid sintered structure, CMI sintered porous metal can withstand high operation pressure and differential pressure. Long working life: In most applications, CMI porous metal filters can work for long time with its high filtration efficiency. Material available: Beside normal material like SS316L, CMI is also strong in producing titanium porous products which can be used in some special applications. Main Applications in instruments:  Particulate-free sampling and Liquid analysis: The gas or liquid to be sampled is introduced at the main stream inlet and accelerates as it passes the filter, due to the reduced flow passage. This increased velocity puts the filter into an inertial mode. Plugging is minimized, since particulate matter in the mainstream is directed parallel to the filter tibe rather than incident to the porous media.  Sparger applications: Carbonation, aeration, hydrogenation, injection of air, oxygen, hydrogen or other gases for gas/liquid reactions. With principle as following: Liquid is introduced at the mainstream inlet and accelerates around the porous element. Gas is injected at left, through the porous tube, creating extremely fine bubbles. As these bubbles emerge from the porous tube, they are continuously sheared by the liquid—further reducing their size and increasing the gas/liquid interface. Bubble size can be varied by adjusting velocity. Higher velocities result in higher shear rates and finer bubble size.  Porous metal filters for chromatography: Pump inlet filters are used for the protection of HPLC pump inlet check valves, and can also be used as a sinker to hold pump inlet tubing at the bottom of the solvent supply.  Inline filters  Pump inlet filters  Line filter element