Search results for: 'air cond'

J-5038 TSUDAKOMA AND TOYOTA AIR JET LOOMS ITEM 001 TSUDAKOMA AIR JET LOOM YEAR: 2006 TOTAL 132 SETS ITEM 002 TOYOTA T710 AIR JET LOOM YEAR: 2008 QUANTITY: 1 Learn More

TT-2295 GAS POWERED MICROGENERATOR 35 KW, GAS, YEAR 2018 TEDOM MODEL MICRO T35AP TEDOM MODEL MICRO T35AP - LPG GAS YEAR 2018 GAS-POWERED MICRO COGENERATION UNIT ALSO KNOWN AS A COMBINED HEAT AND POWER (CHP) UNIT IT IS DESIGNED TO GENERATE HEAT AND ELECTRICITY FROM LPG (LIQUIFIED PETROLEUM GAS QUANTITY: 5 Learn More

TT-2176 BRUCKNER HIGH-PERFORMANCE STENTER, WORKING WIDTH 1300 TO 4200mm, YEAR 2018 BRUCKNER HIGH-PERFORMANCE STENTER TYPE: POWER-FRAME SPLIT FLOW YEAR 2018 ROLLER WIDTH 4400mm WORKING WIDTH 1300 TO 4200mm SPEED 80 M/MIN MACHINE IS IN EXCELLENT CONDITION AND ONLY FEW RUNNING HOURS QUANTITY: 1 Learn More

T-8985 SSM XENO-AC AIR COVERING MACHINES, YEAR 2020 ITEM 001 SSM XENO-AC AIR COVERING MACHINES 50 SPINDLES QUANTITY: 3 ITEM 002 SSM XENO-AC AIR COVERING MACHINE 30 SPINDLES 2 PLY + 1 LYCRA QUANTITY: 1 Learn More

TT-1762 INGERSOLL-RAND DRILLING RIG TYPE: STANDARD BRAND: INGERSOLL RAND CATEGORY: RIGS SUBCATEGORY: ONSHORE RIGS CONDITION: EXCELLENT TYPE: USED QUANTITY: 1 Learn More

TT-1443 COMPLETE SPUNLACE LINE, WORKING WIDTH 3500mm, YEAR 2000 ITEM 001 LAROCHE OPENING & BLENDING SET (COMPRISING OF 4 BALE HOPPER, SET OF FINE OPENER AND FIBRE CONVEYING SYSTEM) QUANTITY: 1 ITEM 002 THIBEAU CARD CA11, WORKING WIDTH 3000mm QUANTITY: 1 ITEM 003 ASSELIN CROSSLAPPER QUANTITY: 1 ITEM 004 RIETER- PERFOJET SPUNLACE MACHINE 3 CYLINDERS/7 INJECTORS WORKING WIDTH 3600mm QUANTITY: 1 ITEM 005 FLEISSNER DRUM DRYER, WORKING WIDTH 3600mm QUANTITY: 1 ITEM 006 BASTIAN AUTOMATIC WINDER, WORKING WIDTH 3600mm QUANTITY: 1 ITEM 007 THIBEAU CARD FEEDER QUANTITY: 1 ITEM 008 ASSELIN WEB-DRAFTER WORKING WIDTH 4400mm QUANTITY: 1 ITEM 009 LOT ELECTRICAL CONTROLS 380V/50Hz QUANTITY: 1 ITEM 010 LOT AUXILIARY EQUIPMENT FOR THE SPUNLACE UNIT QUANTITY: 1 YEAR 2000 DRYER: 8 TYPE, 2 DRUMS Learn More

YY-1966 MELTBLOWN LINE, PRODUCTION SPEED MAXIMUM 100 METERS PER MINUTE 1750mm final trim width (68 inches) DETAILS: CONTAINERS TO SHIP APPROXIMATELY: 15 CONTAINERS 40” OT (THERE MAY BE NEEDED SOME HC OR OUT OF GAUGE CONTAINERS) IT HAS COOLING CALENDER IT HAS WINDER WITH SLITTERS IT PRODUCES 1 TO 5 MICRON (EVEN UNDER 1 MICRON) RANGE OF GSM: IT PRODUCES 15 TO 300 GSM STATUS: ASSEMBLED, IT CAN RUN PRODUCTION YEAR: THE LINE HAS BEEN PRODUCED IN SEPTEMBER 2020 AND IT HAS BEEN IN PRODUCTION ONLY FOR ONE YEAR. QUANTITY: 1 Learn More

REFERENCE NUMBER: Y-2076 TEMPERATURE AND HUMIDITY TEST CHAMBER THIS SERIES OF TEMPERATURE TEST CHAMBER IS SUITABLE FOR THE RELIABILITY TEST OF INDUSTRIAL PRODUCTS. IT HAS THE CHARACTERISTICS OF TEMPERATURE AND HUMIDITY CONTROL PRECISION AND WIDE CONTROL RANGE. ELECTRICAL AND ELECTRONIC PRODUCTS ENVIRONMENTAL TEST EQUIPMENT BASIC PARAMETERS VERIFICATION METHOD LOW TEMPERATURE, HIGH TEMPERATURE, CONSTAMP DAMP HEAT, ALTERNATING WET HEAT TEST EQUIPMENT REQUIREMENTS. SAMPLE REQUIREMENTS IN ORDER TO MAKE YOUR TEST DATA MORE REALISTIC AND EFFECTIVE, THE TEST CHAMBER SHOULD BE USED REASONABLY WHILE SATISFYING THE FOLLOWING PRINCIPLES. THE TOTAL MASS LOAD IS NOT MORE THAN 80 KG PER CUBIC METER OF CHAMBER VOLUME. THE TOTAL VOLUME OF THE LOAD IS NOT MORE THAN ⅕ OF THE WORKING CHAMBER VOLUME IN ANY SECTION PERPENDICULAR TO THE DOMINANT WIND DIRECTION, THE SUM OF THE LOAD AREAS SHOULD BE NO MORE THAN ⅓ OF THE CROSS-SECTIONAL AREA OF THE WORKING CHAMBER. DO NOT BLOCK THE FLOW OF AIRFLOW WHEN THE LOAD IS PLACED. VOLUME DIMENSION: ABOUT 150L INTERIOR SIZE: W: 600mm H: 600mm D: 460mm THE MAIN TECHNICAL PARAMETERS TEST CONDITION COOL METHOD: AIR COOLED MEASURED AT A ROOM TEMPERATURE OF + 25℃ UNDER NO LOAD, THE TEMPERATURE AND HUMIDITY PERFORMANCE TEST IS MEASURED ACCORDING TO THE RELEVANT REGULATIONS. THE SENSOR IS PLACED AT THE AIR OUTLET OF THE AIR HANDLING UNIT TEMPERATURE UNIT RANGE: 40 ℃ TO + 150 ℃ TEMPERATURE FLUCTUATION ± 0.5 ℃ TEMPERATURE UNIFORMITY: ≤ 2.0 ℃ TEMPERATURE DEVIATION: ≤ ± 2.0 ℃ TEMPERATURE CHANGE RATE HEAT UP RATE: - 40 ℃ TO +100 ℃ FULL RANGE AVERAGE SPEED: APPROX 45 MINUTES (NO LOAD) COOLING RATE: +20 ℃ TO 40 ℃ FULL RANGE AVERAGE SPEED: APPROX 60 MINUTES (NO LOAD) QUANTITY: 1 Learn More

NON-INVASIVE VENTILATOR
CERTIFICATE: CE
MEDICAL VENTILATOR
TECHNICAL PARAMETERS OF DOUBLE LEVEL VENTILATOR
VENTILATOR TYPE: ELECTRIC CONTROL
SCOPE OF APPLICATION: TREATMENT AND TITRATION OF SLEEP APNEA HYPOPNEA SYNDROME, SEVERE SNORING, AND RESPIRATORY INSUFFICIENCY.
DISPLAY INTERFACE: 3.5-INCH LED SCREEN, CHINESE OPERATING SYSTEM
*VENTILATION MODE: CPAP, S, S/T, T
PRESSURE RANGE:
PRESSURE RANGE: 4-30CMH2O (±0.5CMH2O)
PRESSURE ACCURACY: + 0.5CMH2O
PARAMETER SETTING:
DELAYED BOOST: 0-60MIN, SET THE DIVISION INTERVAL 5MIN
INITIAL PRESSURE: 4CMH2O TREATMENT PRESSURE / RESPIRATORY PRESSURE SETTING
THERAPEUTIC PRESSURE: 4-20CMH2O (IN CPAP MODE)
TARGET TIDAL VOLUME: 150ML - 1500ML, ON/ OFF
MAXIMUM SUCTION PRESSURE: 4-30CMH2O, (CAN BE SET WHEN THE TARGET TIDAL VOLUME FUNCTION IS ON)
MINIMUM SUCTION PRESSURE: 4-30CMH2O (NOT HIGHER THAN THE SUCTION PRESSURE), (CAN BE SET WHEN THE TARGET TIDAL VOLUME FUNCTION IS ON)
INSPIRATORY PHASE PRESSURE: 4-30CMH2O
EXPIRATORY PRESSURE: 4-30CMH2O
EXPIRATORY DECOMPRESSION: PATIENT, OFF, 1-3, THREE ADJUSTABLE
MANUAL VOLTAGE REGULATION: 0-2 GEAR, 0-2CMH2O (ONLY AVAILABLE IN CPAP MODE)
INSPIRATORY SENSITIVITY: 1-8 STALLS
EXPIRATORY SENSITIVITY: 1-8 STALLS
RESPIRATORY FREQUENCY: 3-40 TIMES / MIN
INSPIRATORY TIME: 0.3-3.0S
BACKUP RATE: ON / OFF, DEFAULT 10
PRESSURE RISE TIME: 1-4 STALLS
HUMIDIFIER: 1-5 ADJUSTABLE IN 5 GEARS
*TITRATION FUNCTION: SUPPORT MANUAL AND AUTOMATIC PRESSURE TITRATION, BUILT-IN REMOTE WIRELESS COMMUNICATION MODULE, COMPLETE THE RANDOM SWITCHING OF SINGLE AND DOUBLE LEVEL MODES IN THE TITRATION PROCESS, AND CONTROL MORE THAN 11 VENTILATOR PARAMETERS AT THE SAME TIME.
AUXILIARY FUNCTION: AUTOMATIC AIR LEAKAGE COMPENSATION, AUTOMATIC STARTUP, AUTOMATIC SHUTDOWN, DELAYED SHUTDOWN, SCREEN BACKLIGHT ADJUSTMENT
MONITORING PARAMETERS: PRESSURE, TIDAL VOLUME, RESPIRATORY RATE, MINUTE VENTILATION VOLUME, AIR LEAKAGE VOLUME, INSPIRATORY TIME, BLOOD OXYGEN SATURATION
WAVY CURVE: PRESSURE TIME WAVEFORM, FLOW RATE TIME WAVEFORM
ALARM PROMPT: PIPELINE AND MASK FALLING OFF, AIR LEAKAGE PROMPT, POWER INTERRUPTION, TREATMENT MACHINE FAILURE, HUMIDIFIER FAILURE, LOW VOLTAGE, HIGH RESPIRATORY RATE, LOW RESPIRATORY RATE, LOW MINUTE VENTILATION VOLUME, LOW BLOOD OXYGEN, REPLACEMENT OF FILTER COTTON, FULL SD CARD, RE INSERTION OF SD CARD
*DATA MANAGEMENT:
NETWORK DATA: BMC + RESPIRATORY HEALTH MANAGEMENT CLOUD PLATFORM
SD CARD DATA: RESART NPAP DATA ANALYSIS SOFTWARE
PARTS:
SD CARD: STANDARD
SD CARD SLOT: STANDARD
PIPING: 9 22MM, 1.8M LONG
FACE SHIELD: F2 NOSE MASK AS STANDARD
NOISE: LESS THAN 30DB
ENVIRONMENT CONDITION:
TEMPERATURE:
(WHEN USED) 5 -35 C
(DURING TRANSPORTATION AND STORAGE) -20 C -55 C
ATMOSPHERIC PRESSURE:
(WHEN USED) 760-1060HPA
(DURING TRANSPORTATION AND STORAGE) 760-1060HPA
WORKING HOURS: MORE THAN 8 HOURS
POWER SUPPLY REQUIREMENTS:
AC VOLTAGE: 100-240V
FREQUENCY: 50HZ/60HZ
INPUT POWER: LESS THAN 2A
WATERPROOF LEVEL: IP22 - DRIP PROOF EQUIPMENT
INSTRUMENT SIZE: 290mm X 180mm X 134mm
WEIGHT: 1.5KG (EXCLUDING HUMIDIFIER) 2.5KG (INCLUDING HUMIDIFIER)
ITEM 001
QUANTITY: 10 SETS-999 SETS
ITEM 002
QUANTITY: 1,000 SETS-9,999SETS
ITEM 003
QUANTITY: ≥10,000 SETS

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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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