Silver Filter Membrane
Silver metal membrane filters are used in a variety of filtration applications, and their ability to withstand extreme chemical and thermal stress makes them ideal laboratory filtration equipment for applications involving aggressive fluids and/or high temperatures.
Silver metal filter membranes are pure metallic silver (99.97% pure silver) and are available with particle retention ratings of 0.2 to 5.0 microns. These silver metal membrane disc filters and sheets are specified in a National Institute for Occupational Safety and Health (NIOSH) standard for the analysis of crystalline and amorphous silica, lead sulfide, boron carbide, and chrysotile asbestos. Our silver metal membranes can be used as the collection media and subsequent x-ray diffraction substrate for quantifying unknown minerals and compounds.
Applications
Silver Membranes can be used for a wide variety of industrial hygiene, OSHA and laboratory applications.
Analytical
X-ray diffraction (XRD); silver metal membranes make excellent substrates for XRD analysis - silver purity 99.97% -- smooth surface, grayish-white color; highly reflective surface; absolute surface retention; low background noise; distinct diffraction peaks.
Scanning Electron Microscopy (EM); smooth; electrically conductive; extremely thin membrane 50 µm; easy sample preparation.
Gas
Air-borne contaminants - National Institute for Occupational Safety and Health (NIOSH) - used for industrial hygiene in foundries, glass plants, quarries, mines, ceramic manufacturing - Methods using 0.45 µm, 25 mm:
Respirable Combustible Dust (RCD) sampling and analysis - 0.8 µm, 25 mm, mines - measurement of diesel particulate matter, evaporated hydraulic fluids, fuel oils, and compressed air lubricants by weighing and ashing.
Liquid
Viscous Fluid
Other Industrial
Technical Specifications
a. Particle retention verified by bubble point pressure
b. Measured in mL/min/cm2 w/pre-filtered H2O at ΔP of 10 psid (0.7 bar); pre-wetted w/methanol
c. Initial flow rates measured in L/min/cm2 w/pre-filtered air at 10 psi (0.7 kg/cm2)
d. Measured using methanol
e. Silver membranes provide excellent filtration performance at temperatures up to 427°C (800°F)
Silver metal filter membranes are pure metallic silver (99.97% pure silver) and are available with particle retention ratings of 0.2 to 5.0 microns. These silver metal membrane disc filters and sheets are specified in a National Institute for Occupational Safety and Health (NIOSH) standard for the analysis of crystalline and amorphous silica, lead sulfide, boron carbide, and chrysotile asbestos. Our silver metal membranes can be used as the collection media and subsequent x-ray diffraction substrate for quantifying unknown minerals and compounds.
Applications
Silver Membranes can be used for a wide variety of industrial hygiene, OSHA and laboratory applications.
Analytical
X-ray diffraction (XRD); silver metal membranes make excellent substrates for XRD analysis - silver purity 99.97% -- smooth surface, grayish-white color; highly reflective surface; absolute surface retention; low background noise; distinct diffraction peaks.
Scanning Electron Microscopy (EM); smooth; electrically conductive; extremely thin membrane 50 µm; easy sample preparation.
Gas
Air-borne contaminants - National Institute for Occupational Safety and Health (NIOSH) - used for industrial hygiene in foundries, glass plants, quarries, mines, ceramic manufacturing - Methods using 0.45 µm, 25 mm:
- N6011 (Bromine and Chlorine)
- N7500 (Silica, Crystalline)
- N7501 (Silica, Amorphous)
- OSHA ID142 (Quartz and Cristobalite in Workplace Atmospheres)
- N7504 (Vanadium Oxide)
- N7505 (Lead Sulfide)
- N7506 (Boron Carbide)
- N9000 (Asbestos, Crysotile)
Respirable Combustible Dust (RCD) sampling and analysis - 0.8 µm, 25 mm, mines - measurement of diesel particulate matter, evaporated hydraulic fluids, fuel oils, and compressed air lubricants by weighing and ashing.
- Steam, or air sterilization, autoclavable
- Venting, high temperatures
Liquid
- Clarification (3.0-5.0 µm); Polishing (1.2 µm); Sterilization (0.2-0.8 µm)
- Intrinsically Bacteriostatic - Silver does not allow the growth of bacteria and other microorganisms.
- High-Performance Liquid Chromatography (HPLC) for a clearer; steadier baseline - may rule out interference from other sources of HPLC solvents (0.2, 0.45, and 0.8 &micor;m); tolerates high temperatures; gases and aggressive liquids -- Tetrahydrofuran (THF)
Viscous Fluid
- Organic Carbon, inorganic, and suspended-sediment water - 0.45 µm, 47 mm, used by U.S. Geological Survey (USGS)
- Lubrication oils for servomechanisms and precision instruments
- Direct-line Applications with a Sprayer
- High-purity fluids in semiconductor applications
Other Industrial
- Chlorine Monitoring - Pulp and Paper Industry, disinfection; removal of tin and zinc in iron; chlorinating hydrocarbons; manufacturing synthetic rubber, plastics, pesticides, refrigerants; treating water and sewage
- Electronics Industry - filter coolants, cleaning fluids, sterile air
- Aircraft/Missile Fuels; critical fluids - resists alcohols, fuels, hydrocarbons, polyaromatic hydrocarbons (PAH), oils, alkalies, ethers
- OSHA - coal tar pitch volatiles, 0.8 µm, 47 mm and 37 mm
- Cold Sterilization (beverages, beer) - absolute particle-retention due to precise pore size
- Soil and clay analysis
- Fly Ash Sampling; Energy Research and Development Agency (ERDA)
- Bacteria Sampling
Technical Specifications
| Coefficient of Thermal Expansion | 18.8 x 106 per °C |
| Thickness | 50 µm (1.97 mil) |
| Sterilization | Air, Autoclave, Steam |
| Resistivity | 1.59 x 10-8 Ωm at 20 °C (68 °F) |
| Specific Heat | 0.448 cal/g at 20 °C (68 °F) |
| Pore Size (a) | H2O Flow Rate (b) | Air Flow Rate (c) | Bubble Point (d) | Max. Operating Temp. (e) |
| 0.22 µm | 17 | 0.35 | 13 | 204°C (400°F) |
| 0.45 µm | 40 | 0.67 | 9 | 204°C (400°F) |
| 0.80 µm | 340 | 1.4 | 7 | 204°C (400°F) |
| 1.20 µm | 460 | 2 | 5 | 204°C (400°F) |
| 3.00 µm | 690 | 1.9 | 3 | 427°C (800°F) |
| 5.00 µm | 870 | 5.2 | 2 | 427°C (800°F) |
b. Measured in mL/min/cm2 w/pre-filtered H2O at ΔP of 10 psid (0.7 bar); pre-wetted w/methanol
c. Initial flow rates measured in L/min/cm2 w/pre-filtered air at 10 psi (0.7 kg/cm2)
d. Measured using methanol
e. Silver membranes provide excellent filtration performance at temperatures up to 427°C (800°F)
| Catalogue No. | Description | Qty / box |
| SH50M-1 | Silver Membrane Filter, 5.0 µm, 15'' X 15'' Sheet | 1 |
| 45343-25 | Silver Membrane Filters, 5.0 µm, 47mm | 25 |
| 45337-25 | Silver Membrane Filters, 5.0 µm, 37mm | 25 |
| 45331-50 | Silver Membrane Filters, 5.0 µm, 25mm | 50 |
| 45325-100 | Silver Membrane Filters, 5.0 µm, 13mm | 100 |
| SH30M-1 | Silver Membrane Filter, 3 µm, 15'' X 15'' Sheet | 1 |
| 45344-25 | Silver Membrane Filters, 3.0 µm, 47mm | 25 |
| 45338-25 | Silver Membrane Filters, 3.0 µm, 37mm | 25 |
| 45332-50 | Silver Membrane Filters, 3.0 µm, 25mm | 50 |
| 45326-100 | Silver Membrane Filters, 3.0 µm, 13mm | 100 |
| SH12M-1 | Silver Membrane Filter, 1.2 µm, 15'' X 15'' Sheet | 1 |
| 45345-25 | Silver Membrane Filters, 1.2 µm, 47mm | 25 |
| 45339-25 | Silver Membrane Filters, 1.2 µm, 37mm | 25 |
| 45333-50 | Silver Membrane Filters, 1.2 µm, 25mm | 50 |
| 45327-100 | Silver Membrane Filters, 1.2 µm, 13mm | 100 |
| 45347-25 | Silver Membrane Filters, 0.45 µm, 47mm | 25 |
| 45341-25 | Silver Membrane Filters, 0.45 µm, 37mm | 25 |
| 45335-50 | Silver Membrane Filters, 0.45 µm, 25mm | 50 |
| 45329-100 | Silver Membrane Filters, 0.45 µm, 13mm | 100 |
| 45346-25 | Silver Membrane Filters, 0.8 µm, 47mm | 25 |
| 45340-25 | Silver Membrane Filters, 0.8 µm, 37mm | 25 |
| 45334-50 | Silver Membrane Filters, 0.8 µm, 25mm | 50 |
| 45328-100 | Silver Membrane Filters, 0.8 µm, 13mm | 100 |
| 45348-25 | Silver Membrane Filters, 0.2 µm, 47mm | 25 |
| 45342-25 | Silver Membrane Filters, 0.2 µm, 37mm | 25 |
| 45336-50 | Silver Membrane Filters, 0.2 µm, 25mm | 50 |
| 45330-100 | Silver Membrane Filters, 0.2 µm, 13mm | 100 |
