Lab Centrifuge
Lab Centrifuge
 |
Freezer Plastic Storage Box 5x10 50 Positions
Sale Price: $5.49  |
DescriptionPlastic storage box Size: 6"x3"x2.5" (14.5x7.5x5.5 cm) Holds 50 tubes in 5 rows Good for microcentrifuge tubes (0.2 to 2 ml) and cryogenic tubes. Freezer safe. Transparent for viewing samples without opening the cover. |
Water in Oil, Whatâs the Big Deal?
Water can be present in lubricating oil in three different forms, dissolved water, emulsified water and free water. Dissolved water refers to water that has been chemically absorbed into the oil. Emulsified water is water that maintains its chemical integrity, but is held in suspension in the oil by additives and contaminants. Free water describes water that is present in the oil, but not held in suspension.
Effects on Lubrication
In general, water is a poor lubricant. Proper lubrication is dependant on the formation of an oil film to separate opposing friction surfaces. When pressure is applied to an oil film, the oil’s viscosity will increase proportionally to maintain protection. Water does not exhibit this tendency and will cause boundary lubrication to occur where Full fluid film lubrication would otherwise be present.
Alarm Limits
Water is considered to be among the most detrimental of possible contaminants. Studies have shown that water present at any level can reduce bearing life from 10 to 100 times. While the overall tolerance for water varies from machine to machine, a good general alarm limit for water contamination is 0.05% (500 ppm). Systems may be more tolerant to water, while others may be more sensitive. Some manufacturers have set limits as low as 30 ppm. Best practice would tend to indicate that it is beneficial to keep water contamination at the lowest level possible.
Controlling Water Contamination
Controlling water contamination requires two individual considerations. First, we must address the issues of keeping water out of the system. Water can contaminate a system by condensation when moist air enters the component and a change in temperature causes the water to condense and drop into the oil. Water can also enter a system through non-drying breathers, faulty hatches and seals, and internally from leaking heat exchangers.
Second, steps must be taken to remove water once it has entered a system. This can be accomplished with physical filtration, vacuum dehydration or centrifuge. For systems prone to contamination, these types of purification can be installed in the system to remove water continuously or on demand.
Systems that are prone to water contamination should use an oil that rapidly separates from water. An oil’s ability to separate from water is known as its demulsibility. High detergent oils tend to be poor demulsifiers, while turbine oils and many industrial lubricants have better demulsibility. Circulating systems prone to water influx, such as those found in rolling mills and power generation plants, can simply drain the water from the reservoir to control contamination, provided the oil exhibits good demulsibility. In these situations, the oil’s demulsibility should be monitored to ensure that water contamination does not reach the lubricated components.
About the Author
Mike has been with Insight Services for 14 years, currently managing the marketing and sales efforts for the company. Insight Services is a full service same-day oil analysis laboratory located in Cleveland, OH. They specialize in samples from industries such as power, manufacturing and chemical.
Very simple lab centrifuge
 |
 Laboratory Centrifuge ADDITIONAL $15 Off Call Now  US $155.00
|
 NEW ELECTRIC CENTRIFUGE LABORATORY MEDICAL PRACTICE CE US $49.90
|
 LAB CORP HORIZON MINI E 642 E CLINICAL CENTRIFUGE US $59.99
|
 Brand New Lab Mini Centrifuge 220V with European Adapter US $168.88
|
 The Drucker Co 614b Laboratory Centrifuge US $99.00
|
 NEW DENTAL LAB CENTRIFUGE CASTING MACHINE APPARATUS US $154.95
|
 ELECTRIC TABLE CENTRIFUGE LAB MEDICAL PRACTICE WITH TIMER US $293.00
|
 4 bucket type Damon IEC LAB CENTRIFUGE refrigerated US $1,250.00 |
 3 Units of Lab Mini Centrifuge 110V US Standard US $458.88
|
 ELECTRIC CENTRIFUGE LABORATORY MEDICAL PRACTICE WITH TIMER US $235.00
|
 microcentrifuge centrifuge laboratory US $100.00
|
 Laboratory Lab Electric Centrifuge Medical Practice 4000RPM US $75.00
|
 Brinkmann Eppendorf 5412 Laboratory Centrifuge Parts US $69.99
|
 Electric Centrifuge for Lab Medcial use 12k rpm USG US $340.00
|
 Drucker 6x 5 15ml Angled Rotor Lab Centrifuge 614B US $382.15
|
| Powered by phpBay Pro |
|
Freezer Plastic Storage Box 5x10 50 Positions
Sale Price: $5.49 |
DescriptionPlastic storage box Size: 6"x3"x2.5" (14.5x7.5x5.5 cm) Holds 50 tubes in 5 rows Good for microcentrifuge tubes (0.2 to 2 ml) and cryogenic tubes. Freezer safe. Transparent for viewing samples without opening the cover. |
 |
H-B Instrument DURAC Dry Block Thermometer, PTFE Safety Coated
|
DescriptionIndividually serialized and designed for use in all standard heating blocks and water baths. Individually packaged in recyclable packaging. |
 |
H-B Instrument Durac PTFE Safety Coated Dry Block Thermometer, with Micro-Centrifuge Tube on Bulb, Organic Fill and White Back Glass, 50 to 110 degree C Range
Sale Price: $58.61 |
DescriptionThis DURAC dry block thermometer is individually serialized and designed for use in all standard heating blocks and water baths. Thermometer features a micro-centrifuge tube on the bulb. PTFE coated. Individually packaged in recyclable packaging... |
 |
Centifuge Tubes Sterile 15Ml Disposable Flat Cap 50/Bg
Sale Price: $8.30 |
DescriptionThese 15ml conical centrifuge tubes are great for centrifugation, sample handling, sample storage, and growing broth cultures among many other uses. They are manufactured with clear polypropylene and Gamma Irradiated for Sterility... |
 |
Brand New Lab Mini Centrifuge US Standard
Sale Price: $149.99 |
DescriptionThe MiNi Centrifuge is supplied with two rotors, one for microtubes and one for 0.2ml PCR strip tubes.The 6¡Á1.5ml rotor is designed to centrifuge up to six individual 1.5ml plastic microcentrifuge tubes... |
 |
Dental Lab Centifuge Casting Machine Apparatus
Sale Price: $139.99 |
DescriptionThis centrifugal casting machine is indispensible for the production of high quality oral restorations. Durable and reliable, our casting apparatus easily handles most alloys with high melting-points that are Used by dentists... |
 |
Brady PTL-72-461 TLS 2200 and TLS PC Link 1.8" Width x 0.5" Height, B-461 Self-Laminating Polyester, Matte Finish White/Translucent Label (500 per Roll)
Sale Price: $58.37 |
DescriptionB-461 can be offered in a self-laminating format which has a white thermal printable zone and a clear overlaminating area. B-461 has good print smudge resistance, solvent resistance, good high and low temperature performance... |
 |
Brady X-117-492 Labxpert 1" Width x 0.5" Height, B-492 Polyester, Semi-Gloss Finish Black on White Freezerbondz II Label (300 per Cartridge)
Sale Price: $64.10 |
DescriptionBrady x 117 492 [PRICE is per EACH] |
