HX-MK stainless steel filter aperture measuring instrument

HX-MKStainless steel filter aperture measuring instrumentIt is a fully automatic intelligent instrument that uses a combination of all metal pipelines and stainless steel sample holders. It uses gas-liquid method to analyze the through holes of materials such as filter membranes, diaphragms, fabrics, fibers, ceramics, sintered metals, etc* Large aperture*A specialized analytical instrument for small pore size, average pore size, pore size distribution, and permeability. The instrument is mainly used in industries such as water filtration, battery separators, seawater desalination, and biological purification.

Test Principle

Taking a certain membrane material as an example, the membrane is fully wetted with a liquid that can be wetted with it. Due to the presence of surface tension, the wetting liquid will be Bound within the pores of the membrane; Apply gradually increasing gas pressure to one side of the membrane. When the gas pressure reaches a pressure greater than the surface tension of the wetting solution in a certain aperture, the wetting solution in that aperture will be pushed out by the gas; Due to the smaller pore size, the higher the pressure generated by surface tension, so the gas pressure required to extract the wetting solution is also higher; Similarly, it can be inferred that the aperture* The wetting solution in the large pores will first be pushed out, allowing the gas to pass through. Then, as the pressure increases, the pore size will decrease, and the wetting solution in the pores will be pushed out in sequence, allowing the gas to pass through until all the pores are opened, achieving the same air permeability as the dry film;

The pressure corresponding to the first opened hole is the bubble point pressure, and the aperture corresponding to this pressure is* Large aperture; During this process, real-time pressure and flow are recorded to obtain the pressure-Flow curve; Pressure reflects information on the size of pore size, while flow reflects information on the number of pores of a certain pore size; Then test the pressure of the dry film again-The flow curve can be calculated according to the corresponding formula to obtain the flow rate of the membrane sample* Large aperture, average aperture*Small pore size, pore size distribution, and air permeability.

performance parameters

Main function: Bubble point diameter（* Large hole diameter); Average flow aperture (average aperture);*Small aperture; Aperture distribution and accumulation/Differential flow distribution; Gas permeability; Dry and wet gas flow rates;

Test scope:0.07-500umoptional0.02-500um）；

Test accuracy: Pressure division value:0.0001 barFlow division value:0.0001 L/min；

Pressure range:0-1barThe0-10baroptional0-35bar）； High precision imported silicon thin film dual pressure sensor, segmented pressure range, complementary range, automatic switching;

Test speed:20-60minComplete the entire testing process;

Flow range:0-1L/min，0-100L/minHigh precision imported dual flow sensor, segmented flow range, complementary range, automatic switching;

sample product Pool: standard diameter13mmDiameter25mmDiameter47mmSpecial clamp for flat film (suitable for sample thickness)0-3mm）, optional diameter12mmSpecialized clamps for hollow fiber membranes, and sample tanks of other specifications can also be customized according to needs;

Gas pipeline: Metal integrated modular pipeline, reducing pipeline length and leakage points, avoiding pressure drop caused by excessively long pipelines. The interface adopts metal hard seal, with good sealing, high pressure resistance, corrosion resistance, and durability;

Vacuum infiltration: Optional vacuum lubrication instrument, which can set the duration of vacuum lubrication. After lubrication is completed, it automatically returns to normal pressure;

Test gas:40Raise pure nitrogen gas, purity ≥99.9%Optional air compressor;

Core accessories: silicon thin film pressure transmitter, flow sensor, electronic control pressure regulating valve, etc;

Data processing: Built in industrial computer, independently developed control software, simple interface.

HX-MKStainless steel filter aperture measuring instrumentInstrument size: Length:400mm; Width:400mm, High:490mmNet weight:37kg；