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YY-2208 HUMAN CREMATION MACHINE, LIGHT DIESEL FUEL, GAS, NATURAL GAS, LIQUEFIED GASYY-2208 HUMAN CREMATION MACHINE, LIGHT DIESEL FUEL, GAS, NATURAL GAS, LIQUEFIED GAS DETAILS: 1. INCORPORATES EFFICIENT HEAT EXCHANGER AND SPECIAL AIR PATH STRUCTURE, MAKE FULL USE OF WASTE HEAT COMBUSTION FUEL GAS, IMPROVING HEAT UTILIZATION RATE, GOOD ENVIRONMENTAL PROTECTION INDEX, SAVES FUEL AND SHORTENS CREMATION TIME. 2. NEW REFRACTORY MATERIALS (EXCLUSIVE FORMULA) THAT ARE RESISTANT TO HIGH TEMPERATURE WITH LOW SPECIFIC HEAT. GREATLY EXTEND THE SERVICE LIFE. 3. SPECIAL CASTING MATERIAL, HIGH TEMPERATURE RESISTANCE, LONG SERVICE LIFE; SHORTENS THE COOLING CYCLE. THE BRICK STRUCTURE ON BOTH SIDES OF THE ASH PICKING FURNACE DOOR WILL NOT HAVE CRACKS CAUSED BY DESIGN OR QUALITY PROBLEMS GUARANTEED FOR ONE YEAR. REFRACTORY MATERIALS, THE FURNACE CONTACT ARE WITH FLAME HAS PHOSPHORIC ACID A CHARACTERISTIC COMBINATION BRICK WHICH CAN RESIST RAPID COOLING AND RAPID HEAT, AND THE ARCHED ROOF INCORPORATES HIGH ALUMINUM SINTERED MOLDING BRICK. THE FURNACE BODY IS SURROUNDED BY ALUMINUM SILICATE WOOL WITH GOOD HEAT INSULATION AND HEAT PRESERVATION PERFORMANCE. THE THICKNESS IS 180mm. 4. ALL OPERATING SYSTEMS OF THE EQUIPMENT HAVE THREE SETS OF OPERATION FUNCTIONS, NAMELY AUTOMATIC, SEMI-AUTOMATIC AND MANUAL, WHICH CAN BE SWITCH BETWEEN THEM WITHOUT INTERFERENCE. AUTOMATIC CONTROL, TELECOMMUNICATION OPERATION AND ANIMATION DISPLAY. KEEPING THE OPERATOR AWAY FROM THE CREMATION SITE AND PROTECTING THE OPERATOR. AT THE SAME TIME EQUIPPED WITH A STANDBY OPERATING SYSTEM. LOW NOISE MOTOR EQUIPMENT, THERMOCOUPLE RESISTANCE TO HIGH TEMPERATURE. ALL ELECTRICAL CABINETS OF THE EQUIPMENT ARE EXTERNAL. 5. THE OIL SUPPLY SYSTEM INCORPORATES AUTOMATIC CONTROL AND MANUAL CONTROL, AND INCORPORATES OIL PROTECTION TECHNOLOGY, WHICH CAN EFFECTIVELY PREVENT FUEL OIL FROM RUNNING, BUBBLING, LEAKING AND CAUSING FURNACE EXPLOSION ACCIDENTS INCLUDING ANTI-LEAKAGE TECHNOLOGY TO BETTER PROTECT THE PERSONAL SAFETY OF OPERATORS. 6. THE BLOWER, THE INDUCED DRAFT FAN, THE FURNACE DOOR MOTOR, THE BODY CART MOTOR, THE PREPARATORY DOOR MOTOR AND THE FLUE GATE MOTOR ARE ALL INSTALLED WITH AN INTEGRATED DEVICE FOR OVER-CURRENT AND SHORT-CIRCUIT PROTECTION. 7. SPECIAL DIESEL METERING DEVICE, ACCURATE METERING. QUANTITY: 1 Learn More -
T-9598 TEXTILE COLOR FASTNESS TO WASHING TESTERT-9598 TEXTILE COLOR FASTNESS TO WASHING TESTER KEY SPECIFICATION: CUP COMPOSITE MODE: 2A+2B, 4A+4B, 6A+6B, 8A+8B, 8A+12B, 12A, 8B, CUSTOMIZED AATCC CUP VOLUME (A): 1200ML ISO CUP VOLUME (B): 550ML CONTROL MODE: LCD COUNTER DISPLAY ROTATION SPEED: 40±2 RPM TEMPERATURE CONTROL RANGE: RT TO 100℃ HEATING METHODS: ELECTRICAL HEATING STAINLESS STEEL BALLS:¢6mm STAINLESS STEEL DRY CLEANING DISCS:¢30mm, THICKNESS: 3mm, MASS: 20G POWER SUPPLY: 3∮AC 380V 50/60Hz PACKED DIMENSIONS: 890 x 690 x 1200mm PACKED WEIGHT: 130 KG Learn More -
YY-1521COMPUTERIZED SINGLE HEAD QUILTING MACHINEYY-1521COMPUTERIZED SINGLE HEAD QUILTING MACHINE QUANTITY: 1 Learn More -
YY-1311 BALL WINDER MACHINE, PACKAGE WEIGHT 50 TO 100 GRAMS, 256mm SPINDLE GAUGEYY-1311 BALL WINDER MACHINE, PACKAGE WEIGHT 50 TO 100 GRAMS, 256mm SPINDLE GAUGE VOLTAGE: 380V, 3 PHASE, 60 OR 50Hz (AS PER CUSTOMER) YARN MATERIAL: WOOL YARN WITH AUTOMATIC YARN CUTTING SYSTEM QUANTITY: 1 Learn More -
MTU CONTAINERIZED DIESEL GENERATOR PLANT, 30.5 MW, YEAR 2017 AND 2018REFERENCE NUMBER: T-6933 MTU CONTAINERIZED DIESEL GENERATOR PLANT, 30.5 MW, YEAR 2017 AND 2018 MTU CONTAINERIZED DIESEL GENERATOR PLANT 30.5 MW FIFTEEN (15) MTU16V4000G63 EXHAUST EMISSION OPTIMIZED DIESEL ENGINES COUPLED TO HIGH PERFORMANCE MECC ALTE ECO46 2L/4A ALTERNATORS, RATED AT 2546 KVA/2033 KW STANDBY POWER AND 2303 KVA / 1842 KW PRIME POWER, 1500 RPM, 400 VOLT, 50 Hz, YEAR OF MANUFACTURE: 2017 AND 2018, ONLY 150 TO 200 HOURS SINCE NEW. EACH GENERATOR IS HOUSED IN A 40 FT SOUND ATTENUATED CONTAINER. SKID MOUNTED RADIATOR DESIGNED FOR HIGH END TEMPERATURES, 40 FT HI CUBE CONTAINER WITH SWITCH GEAR ROOM AND CONTROL ROOM, EQUIPMENT INCLUDES: CONTROL PANELS, CONTROL SYSTEM, BREAKER PANELS, HEATERS, BATTERY CHARGER, SWITCH GEAR, TRANSFORMERS, FUEL TANK SYSTEM AND ETC. COMPLETE POWER PLANT IN MODULE DESIGN THAT CAN BE EASILY TRANSPORTED AND SET UP WITHIN DAYS TO GENERATOR STEADY STREAM OF ELECTRICAL POWER. (15) ALL PURPOSE 40 FT SOUND ATTENUATED CONTAINERS WITH MTU16V4000G63 GENERATORS SETS. RATING: 2546 KVA/2033 KW STANDBY POWER AND 2303 KVA / 1842 KW PRIME POWER RADIATOR: SKID MOUNTED RADIATOR DESIGNED FOR HIGH END TEMPERATURES RADIATOR DESIGN: TECNO GROUP TG00094AA 30M/S REDUCED AIRFLOW RADIATOR WITH ELECTRIC POWERED COOLING FAN POWER BOX: CP6 MODEL: HMW‐2200‐T5 STD 2200KVA V400 / 50 Hz AS20 YEAR: 2017 AND 2018 HOURS: 150 TO 200 HOURS ONLY VOLTAGE: 400V, 3PH, 50 Hz ENGINE: MTU 16V4000G63 EXHAUST EMISSION OPTIMIZED ENGINE ENGINE SPEED: 1500 RPM STARTING SYSTEM: 24V ELECTRIC WITH OPTIMA YELLOW TOP BATTERIES AND BATTERY ISOLATOR ENGINE GOVERNOR: ADEC ALTERNATOR: MECC ALTE ECO46 2L/4A WITH MAUX EXCITATION, OIL PRIMER AND CENTRIFUGE FITTED AS CONFIRMED BY MTU, SET MOUNTED 4000A 4P MOTORIZED BREAKERS. CONTROL PANEL: AS5 WITH FREE ISSUE COMAP IG‐NTC‐BB + INTELIVISION 5 COMPONENTS AIR CIRCUIT BREAKER PANEL: 4 POLE: 4000A SCHNEIDER NW04 MOTORIZED H2 100KA BREAKING CAPACITY WITH MICROLOGIC 6.0A TRIP UNIT HEATER: THERMOSTATICALLY CONTROLLED 9KW 400V 3 PHASE WATER JACKET HEATER WITH CIRCULATION PUMP BATTERY CHARGER: DEEPSEA DSE9470 10A INTELLIGENT MAINS BATTERY CHARGER INCLUDING: AUTOMATIC ELECTRIC PRE‐LUBE PUMP; SET MOUNTED 2000A NEUTRAL EARTHLING CONTACTOR WITH CT; FUEL RETURN COOLER; CENTRIFUGAL OIL FILTER (MTU) & PRIMARY WATER SEPARATOR FILTER. INCLUDING: AUTOMATIC ELECTRIC PRE‐LUBE PUMP; SET MOUNTED 2000A NEUTRAL EARTHING CONTACTOR WITH CT; FUEL RETURN COOLER; CENTRIFUGAL OIL FILTER (MTU) & PRIMARY WATER SEPARATOR FILTER. TRANSFORMERS QUANTITY 4: 4MVA GBE OIL IMMERSED, FREE BREATHING STEP UP POWER TRANSFORMERS WITH OIL CONSERVATOR AND COPPER WINDINGS; 3 PHASE, 400‐33 KV; 50 Hz QUANTITY 1: 2MVA GBE OIL IMMERSED, FREE BREATHING STEP UP POWER TRANSFORMERS WITH OIL CONSERVATOR AND COPPER WINDINGS; 3 PHASE, 400‐33 KV; 50 Hz HV SWITCHGEAR CONTAINER PURPOSE BUILT 40 FT HI CUBE CONTAINER WITH HEATING LIGHTING AND POWER INSTALLED. LINED WITH ROCK WOOL INSULATED PANELS INCLUDES HIGH LEVEL LOUVER WITH FAN AND LOW‐LEVEL LOUVER FOR NATURAL AIR FLOW. SPLIT INTO TWO SECTIONS/ROOMS WITH A CONTROL ROOM ON ONE SIDE AND SWITCH GEAR IN THE OTHER ROOM WITH 33 KV ABB RING SAFE SWITCHGEAR CONTROL SYSTEM REMOTE COMMUNICATION AND LOAD SUMMATION CONTROL PANEL (RCLSP) 1 X COMAP IM‐NTC BB BASE BOX CONTROLLER (SITE LOAD VALUE MONITORING & INTEGRATION) 1 X COMAP IBNT INTERNET BRIDGE (BROADBAND INTERFACE) 1 X COMAP ILB+ LOCAL BRIDGE (LOCAL & PC REMOTE INTERFACE) 1 X 230/240V DC PSU 1 SET OF CONTROL MINIATURE CIRCUIT BREAKERS 1 SET OF CAN BUS INTERFACE TERMINALS BELDON 3106A CANBUS COMMUNICATION CABLING & CAT 5E ETHERNET COMMUNICATION CABLES COMAP MAINSPRO G59‐3 PROTECTION RELAY (OVER/UNDER VOLTS, Hz & VECTOR SHIFT) FUEL TANK SYSTEM QUANTITY 4 X 40,000L FUEL TANKS; DOUBLE SKINNED; DD50 FUEL POLISHING SYSTEM; BUND ALARM; OVERFILL ALARM AND CONTENTS GAUGE WITH ADJUSTABLE VOLT FREE LEVEL ALARM. QUANTITY 1 X 20,000L FUEL TANKS; DOUBLE SKINNED; DD50 FUEL POLISHING SYSTEM; BUND ALARM; OVERFILL ALARM AND CONTENTS GAUGE WITH ADJUSTABLE VOLT FREE LEVEL ALARM. Learn More -
1000 L STABILITY CHAMBERREFERENCE NUMBER: A-2492 1000 L STABILITY CHAMBER SPECIFICATIONS: INNER CHAMBER SIZE: 1 X 1 X 1 mm EXTERNAL DIMENSION: 1.2 X 1.97 X 2.17 mm TEMPERATURE RANGE: 70 TO 180°C HUMIDITY RANGE: 10% TO 98% RH, WHEN THE TEMPERATURE IS ABOVE 60°C, THE HUMIDITY CAN ACHIEVE 10% RH TEMPERATURE & HUMIDITY FLUCTUATION: ±0.2℃, ±0.5% RH INDICATION RESOLUTION: 0.01℃, 0.1% RH TEMPERATURE & HUMIDITY UNIFORMITY: ±2℃, ±3% RH (TESTED WITH THE EMPTY CHAMBER, 30 MINUTES AFTER STABILIZATION) HEAT UP AND COOL DOWN TIME: HEATING RATE: AVERAGE 3 ℃/MINUTES; COOLING RATE: AVERAGE 1 ℃/MINUTE (UNLOADED TEST) MATERIAL: INNER CHAMBER: SUS#304 STAINLESS STEEL EXTERIOR STRUCTURE: STAINLESS STEEL PLATE + POWDER COATED INSULATION: GLASS WOOL & PUF PERSPIRATION RESISTANT: K STYLE TUBE ACCESSORIES • TEMPERATURE RESISTANT SILICONE GASKET: 1 PC • CABLE PORT:1 PC; OD: 100 mm • WINDOW LIGHT: 1 PC • MULTIPANE VIEW WINDOW: 1 PC • LOADING SHELVES: 2 PCS REFRIGERATION & HEATING SYSTEM • ORIGINAL IMPORTED HIGH EFFICIENCY COMPRESSOR • AIR COOLING CONDENSER • FIN – TUBE HEATER • ORIGINAL IMPORTED SOLENOID VALVES • INNER SPIRAL K – TYPE REFRIGERANT COPPER TUBE • U – TYPE FINNED ELECTRO - THERMAL TUBE • HEATING & COOLING SYSTEMS SEPARATED • SINGLE STAGE REFRIGERATING SYSTEM HUMIDIFYING & DEHUMIDIFYING SYSTEM • ELECTRIC & BYTE TYPE HUMIDIFYING SYSTEM • STAINLESS STEEL HUMIDIFYING BARREL WITH VIEW WINDOW FOR WATER LEVEL • ADP DEHUMIDIFYING WAY • OVER – TEMPERATURE AND OVERFLOW PROTECTION UNITS • HUMIDIFYING & DEHUMIDIFYING SYSTEMS SEPARATED CIRCLING & DRAIN SYSTEM • CENTRIFUGAL FAN & IMPORTED MOTOR • REVERSE UNIFLOW (AIR FLOW DIRECTION) • FLOW – THROWS WIND • DRAIN SYSTEM USES SWIRL TYPE OUTLET AND U – TRAP DEPOSITION UNIT PROGRAMABLE MICRO COMPUTER LCD TOUCH CONTROLLER • PROGRAMMABLE TOUCH CONTROLLER, USER - FRIENDLY, STABLE AND EASY USE • PROGRAMS: 99 SEGMENTS PER PROGRAM, 120 PROGRAMS, 120 CYCLING PER PROGRAM • PID & SSR CONTROL WAY, STABLE AND EASY USE • HAVE SLOP CONTROL FUNCTION FOR HEATING & COOLING, LINKED PTNS CAN BE EXECUTED • PID AUTOMATIC CALCULATION • MICRO COMPUTER MULTI FUNCTION CONTROLLER, MAIN COMPONENTS ’DATA AUTOMATICALLY OUTPUT INCLUDING COMPRESSORS, SOLENOIDS, HEATING UNITS, ETC • ERRORS OF MAIN COMPONENTS APPEAR ON THE LCD PANEL • THE BRIGHTNESS OF THE LCD PANEL CAN BE ADJUSTED • TIME SEQUENCE CONTROL INTERFACE RELAYS HAVE 3 GROUPS WHICH MANAGE THE OUTPUT OF OUTSIDE LOGIC UNITS INCLUDING SIGNAL, MECHANICAL AND POWER, ETC • PROGRAMS AUTO – SAVE FUNCTION IF POWER CUT OFF SUDDENLY • HAVE HOLD & ADV BUTTONS INPROGRAMS • AUTOMATICALLY SET THE HIGH & LOW TEMPERATURE LIMITS AFTER PROGRAMS SET • PASSWORD SET FUNCTION • SD CARD SLOT, 2 GB SD CARD, RS232 OR ETHERNET (RJ45) OPERATING ENVIRONMENT • AMBIENT TEMPERATURE: +25℃ (2) RH ≤85% PROTECTION • ELECTRICITY LEAK PROTECTION • LIGHTNING STRIKE PROTECTION, ZRN LIGHTNING ARRESTER INSIDE THE CONTROLLER • SENSOR DATES TRANSFERRED INSIDE THE MICRO COMPUTER • TEMP. SENSORS TO OPEN CIRCUIT OR SHORT CIRCUIT (+ - OVER) • THE FIRST LEVEL OVER TEMPERATURE PROTECTION • ERROR DETECTED UNITS • THE SECOND LEVEL OVER TEMPERATURE PROTECTION TO ELECTRONIC OVER - TEMP PROTECTION UNIT • THE THIRD LEVEL OVER - TEMPERATURE PROTECTION • COMPRESSOR PROTECTION TO REFRIGERANTS PRESSURE PROTECTION & OVERLOAD PROTECTION. • EXTENDED PROTECTION UNIT TO TWO SUPPLETIVE PORTS • ERROR PROTECTION TO POWER CUT OFF, ERROR REPORTS SHOWN IN LCD PANEL AND AUDIBLE ALARM STARTS • DYNAMIC HIGH AND LOW TEMPERATURE PROTECTION • AMBIENT TEMPERATURE PROTECTION TO THE INNER CHAMBER AND SPECIMENS AUTOMATICALLY RETURN BACK TO AMBIENT TEMPERATURE AFTER THE OPERATION STOP SAFETY PROTECTION • NON-FUSE PROTECTION SWITCH • OVERHEAT ALARM PROTECTION • COMPRESSOR OVERLOAD PROTECTION • PHASE SEQUENCE PROTECTION • MOTOR OVER TO CURRENT PROTECTION Learn More -
D-2388 What’s the Best Material for a Mask?Federal health officials have now recommended that we cover our faces with fabric during the coronavirus pandemic. But what material offers the most protection?
The Centers for Disease Control and Prevention has posted a no-sew mask pattern using a bandanna and a coffee filter as well as a video on making masks using rubber bands and folded fabrics found at home.
While a simple face covering can reduce the spread of coronavirus by blocking outgoing germs from coughs or sneezes of an infected person, experts say there is more variation in how much homemade masks might protect the wearer from incoming germs, depending on the fit and quality of the material used.
Scientists around the country have taken it upon themselves to identify everyday materials that do a better job of filtering microscopic particles. In recent tests, HEPA furnace filters scored well, as did vacuum cleaner bags, layers of 600-count pillowcases and fabric similar to flannel pajamas. Stacked coffee filters had medium scores. Scarves and bandanna material had the lowest scores, but still captured a small percentage of particles.
If you don’t have any of the materials that were tested, a simple light test can help you decide whether a fabric is a good candidate for a mask.
“Hold it up to a bright light,” said Dr. Scott Segal, chairman of anesthesiology at Wake Forest Baptist Health who recently studied homemade masks. “If light passes really easily through the fibers and you can almost see the fibers, it’s not a good fabric. If it’s a denser weave of thicker material and light doesn’t pass through it as much, that’s the material you want to use.”
Researchers say it’s important to remember that lab studies are conducted under perfect conditions with no leaks or gaps in the mask, but the test methods give us a way to compare materials. And while the degree of filtration for some homemade masks seems low, most of us — who are staying home and practicing social distancing in public — don’t need the high level of protection required for medical workers. More important, any face covering is better than none, especially if worn by a person who has the virus but doesn’t know it.
The biggest challenge of choosing a homemade mask material is to find a fabric that is dense enough to capture viral particles, but breathable enough that we can actually wear it. Some items being touted online promise high filtration scores, but the material would be unwearable.
Dressing Up for Work … at Home
Yang Wang, an assistant professor of environmental engineering at Missouri University of Science and Technology, worked with his graduate students to study various combinations of layered materials — including both air filters and fabric. “You need something that is efficient for removing particles, but you also need to breathe,” said Dr. Wang, who last fall won an international award for aerosol research.To test everyday materials, scientists are using methods similar to those used to test medical masks, which everybody agrees should be saved for medical workers who are exposed to high doses of virus from seeing infected patients. The best medical mask — called the N95 respirator — filters out at least 95 percent of particles as small as 0.3 microns. By comparison, a typical surgical mask — made using a rectangular piece of pleated fabric with elastic ear loops — has a filtration efficiency ranging from 60 to 80 percent.
Dr. Wang’s group tested two types of air filters. An allergy-reduction HVAC filter worked the best, capturing 89 percent of particles with one layer and 94 percent with two layers. A furnace filter captured 75 percent with two layers, but required six layers to achieve 95 percent. To find a filter similar to those tested, look for a minimum efficiency reporting value (MERV) rating of 12 or higher or a microparticle performance rating of 1900 or higher.
The problem with air filters is that they potentially could shed small fibers that would be risky to inhale. So if you want to use a filter, you need to sandwich the filter between two layers of cotton fabric. Dr. Wang said one of his grad students made his own mask by following the instructions in the C.D.C. video, but adding several layers of filter material inside a bandanna.
Dr. Wang’s group also found that when certain common fabrics were used, two layers offered far less protection than four layers. A 600 thread count pillow case captured just 22 percent of particles when doubled, but four layers captured nearly 60 percent. A thick woolen yarn scarf filtered 21 percent of particles in two layers, and 48.8 percent in four layers. A 100 percent cotton bandanna did the worst, capturing only 18.2 percent when doubled, and just 19.5 percent in four layers.
The group also tested Brew Rite and Natural Brew basket-style coffee filters, which, when stacked in three layers, showed 40 to 50 percent filtration efficiency — but they were less breathable than other options.
If you are lucky enough to know a quilter, ask them to make you a mask. Tests performed at the Wake Forest Institute for Regenerative Medicine in Winston-Salem, N.C., showed good results for homemade masks using quilting fabric. Dr. Segal, of Wake Forest Baptist Health, who led the study, noted that quilters tend to use high-quality, high-thread count cotton. The best homemade masks in his study were as good as surgical masks or slightly better, testing in the range of 70 to 79 percent filtration. Homemade masks that used flimsier fabric tested as low as 1 percent filtration, Dr. Segal said.
The best-performing designs were a mask constructed of two layers of high-quality, heavyweight “quilter’s cotton,” a two-layer mask made with thick batik fabric, and a double-layer mask with an inner layer of flannel and outer layer of cotton.
Bonnie Browning, executive show director for the American Quilter’s Society, said that quilters prefer tightly woven cottons and batik fabrics that stand up over time. Ms. Browning said most sewing machines can handle only two layers of fabric when making a pleated mask, but someone who wanted four layers of protection could wear two masks at a time.
Ms. Browning said she recently reached out to quilters on Facebook and heard from 71 people who have made a combined total of nearly 15,000 masks. “We quilters are very much in the thick of what’s going on with this,” said Ms. Browning, who lives in Paducah, Ky. “One thing most of us have is a stash of fabric.”
People who don’t sew could try a folded origami mask, created by Jiangmei Wu, assistant professor of interior design at Indiana University. Ms. Wu, who is known for her breathtaking folded artwork, said she began designing a folded mask out of a medical and building material called Tyvek, as well as vacuum bags, after her brother in Hong Kong, where mask wearing is common, suggested it. (DuPont, the maker of Tyvek, said in a statement that Tyvek is intended for medical apparel, not masks.) The folded mask pattern is free online, as is a video demonstrating the folding process. In tests at Missouri University and University of Virginia, scientists found that vacuum bags removed between 60 percent and 87 percent of particles. But some brands of vacuum bags may contain fiberglass or are harder to breathe through than other materials, and shouldn’t be used. Ms. Wu used a bag by EnviroCare Technologies, which has said it does not use fiberglass in its paper and synthetic cloth bags.
“I wanted to create an alternative for people who don’t sew,” said Ms. Wu, who said she is talking to various groups to find other materials that will be effective in a folded mask. “Given the shortage of all kinds of materials, even vacuum bags might run out.”
The scientists who conducted the tests used a standard of 0.3 microns because that is the measure used by the National Institute for Occupational Safety and Health for medical masks.
Linsey Marr, a Virginia Tech aerosol scientist and an expert in the transmission of viruses, said the certification method for respirators and HEPA filters focuses on 0.3 microns because particles around that size are the hardest to catch. While it seems counterintuitive, particles smaller than 0.1 microns are actually easier to catch because they have a lot of random motion that makes them bump into the filter fibers, she said.
“Even though coronavirus is around 0.1 microns, it floats around in a wide range of sizes, from around 0.2 to several hundred microns, because people shed the virus in respiratory fluid droplets that also contain lots of salts and proteins and other things,” said Dr. Marr. “Even if the water in the droplets fully evaporates, there’s still a lot of salt and proteins and other gunk that stays behind as solid or gel-like material. I think 0.3 microns is still useful for guidance because the minimum filtration efficiency will be somewhere around this size, and it’s what NIOSH uses.”
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V-1041 AIRLAY- FELT LINE 2400mmINDEX 1. Technical specification pag.2 2. Line composition pag.3 3. Machines description pag.4 4. Total price of the turn-key plant pag.25 5. Sale terms pag.26 6. Payment terms pag.28 7. General selling terms and conditions pag.29 Learn More -
K-3713 LAUNDRY SOAP PRODUCTION LINE-CAPACITY 1000 -1500 KG/HRREFERENCE NUMBER: K-3713 LAUNDRY SOAP PRODUCTION LINE-CAPACITY 1000 -1500 KG/HR THIS PRODUCT LINE IS A SOAP COMPLETE LINE STARTING FROM OIL MELTING, SAPONIFYING, VACUUM DRYING AND COOLING, MILLING SOAP NOODLES AND REFINING CONTINUOUSLY, THEN STAMPING INTO SOAPS. THIS PRODUCT LINE HAS ADVANCED TECHNOLOGY INCLUDING COVERING LESS FLOOR AREA, CONSUMING LESS ENERGY, SAVING HUMAN RESOURCES, AUTOMATING PROCESSES, PRODUCING HIGH QUALITY SOAPS WITH 50 TO 80% FATTY ACID CONTENT. QUANTITY AVAILABLE: 1
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M-1998 BAUMER ISL YEAR 2003REFERENCE NUMBER: M-1998-A BAUMER ISL YEAR 2003 80" BAUMER ISL SAW YEAR 2003 DIMENSIONS OF THE TABLE: 87.5” LONG AND 92” ON EACH SIDE OF THE FENCE MANUAL VERTICAL CUTTING MACHINE FOR THE CUTTING AND TRIMMING, RESPECTIVELY, OF BLOCK OR SHEET WARE FROM FLEXIBLE FOAMS THE TABLE IS MANUALLY MOVED, THE LATERAL STOP IS ADJUSTED BY MEANS OF A HAND WHEEL. QUANTITY AVAILABLE: 1 Learn More