AIR ENTRAINING ADMIXTURES
microscopic air bubbles called entrained air produced by the mixing action These air bubbles improve the concrete s resistance to damage caused by exposure to cycles of freezing and thawing and deicing salt application In fresh concrete entrained air improves workability and
4 Reasons You Have Entrained Air In Your Pumping System
product with entrained air This is problem is very common in paper stock applications but could be seen in other industries where air pockets in the product being pumped are present There s not much you can do to change the product to appease the pump but there are ways to modify your pump or process to keep your pump happier
How to deal with air contamination of hydraulic oil
Dissolved air hydraulic oil contains between 6 and 12 percent by volume of dissolved air Entrained air air bubbles typically less than 1 mm in diameter dispersed in the oil air bubbles typically greater than 1 mm in diameter that congregate on the surface of the oil Of these four forms entrained air is the most problematic
Tried True Ways of Dealing with Air in Hydraulic Fluid
Tried True Ways of Dealing with Air in Hydraulic Fluid Symptoms typical of an aerated hydraulic system plagued the F 104 aircraft for years Aeration was caused by system components with built in chambers and passages where free air bubbles collected when system fluid was saturated or at rest with no pressure acting on the fluid
GREEN PAPER FROTH PUMP DISCUSSION KETO Pumps
KETO Green Papers Pumping Froth and Air Entrained Slurries 2017 At the pump frothy slurries are treated as an equivalent fluid with increased volume and decreased density The coefficient of proportionality is called the pump froth factor Depending on the design of the suction arrangement this froth factor can vary from 1 to as much as 8
Air Entrainment versus Air Entrapment NPCA
Entrained air also helps highway concrete slabs where large area is exposed to sun in countries where day temperature reaches 48 degree centigrade and night temperature reaches 15 degree centigrade steel fibers up to 35 kg m3 are used to control micro cracking only aggregates which have least coefficient of expansion shall be used for exposed to sun slabs further research is required to
entrained Spanish translation – Linguee
These grades have excellent air release properties which allow entrained air to separate thus avoiding pump cavitation and erratic operation cepsa com Estos grados poseen excelentes propiedades de liberació n de a ire que permitirá q ue el ai re atrapado se separe evitando de esta forma la operación errática y de cavitación de la bomba
In Line Air Separators Taco Comfort Solutions
the separator These air separators are designed built and stamped to the requirements of ASME The rated Water contains a certain amount of entrained air If this air comes out of solution it can increase corrosion rates of metals within the system In addition air can form pockets at the top of pipes
SlurryAirSeparator Mechanical Cement Slurry Defoamer
The SlurryAirSeparator defoamer uses the hydrocyclone principle to separate entrained air from the cement slurry during the mixing process By mechanically removing entrained air in the cement slurry the system eliminates foaming problems and decreases the risk of pump cavitation problems
Removing Entrained Air in Hydraulic Fluids and Lubrication
Keywords air content air entrainment bubbles consistency measurements deaeration dissolution gas content measurements gas removal precipitation pulp suspensions Acknowledgements The research work reported in this thesis was carried out at the University of Oulu in the
Air Solubility in Water Engineering ToolBox
Example Air Dissolved in Water The amount of air dissolved in water mass of air to volume mass of water can be calculated with Henry s law Henry Law s Constants at a system temperature of 25 o C 77 o F Oxygen O 2 756 7 atm mol litre Nitrogen N 2 1600 atm mol litre Molar Weights
De aeration ANDRITZ
The ANDRITZ concept for air removal from stock Complete deaeration of pulp ahead of modern high speed paper and board machines is a necessity Pressure drops and micro turbulence in the headbox release dissolved gas into entrained air bubbles
Innovative Disc Pump technology Discflo
The Discflo pump also excels at handling abrasive and viscous slurries from the chemical recovery process shear sensitive chemicals such as paper coating slurries and sludges with a high solids content or high levels of entrained air The Discflo Stock Pump can handle up to 70 entrained air or gas without cavitating
HVF High Volume Froth Pump for Air Entrained Slurries
Choose the GIW® Minerals HVF Pump for Air Entrained Slurries Deaeration Chamber The HVF pump s innovative deaeration chamber removes air from the pumping process This ensures active air clearing and an open path to the atmosphere while reducing costly product losses and water additions
Using Ultrasound to Characterize Pulp Slurries With
The effects of entrained air additives the origin and treatment of the fibers do however all influence the measured data A series of measurements were made with hardwood and softwood slurries to evaluate the ability of measuring pulp consistency solids and entrained air
Air Separation Parker Hannifin
The Phenomena of Air Separation in Diesel Fuel Fact 1 There is AIR entrained in diesel fuel Fact 2 A very slight pressure drop can cause air to form visible bubbles Fact 3 Air can cause problems Fact 4 Air entrained in diesel fuel is not the same as diesel fuel vapor Fact 5 Air once freed from fuel will not go back into solution
FEATURE ARTICLE STLE
Entrained air bubbles with diameters smaller than 1 mm dispersed throughout the oil causes its own problems and requires solutions all on its own Air is entrained in oil when the oil experi ences turbulence or agitation This can occur as the oil goes through bearings couplings gears Entrained air can shorten a lubricant s life
CLAMP ON SONAR BASED ENTRAINED AIR MEASURMENT
of entrained air levels as well as the source of the entrained air are typically not well understood nor well monitored Currently many operators rely on periodic sampling to determine entrained air levels Over the years several technologies have been introduced in an attempt to provide real time entrained air measurement Woodworth 1990
Entrainment phenomenon in gas–liquid two phase flow A
Carryover entrainment gas–liquid phase separation 1 Introduction Entrainment carryover is a phenomenon associated with systems in which the liquid and gases or vapours are in relative motion It may be defined as pneumatic conveyance of drops of liquid into gaseous phase It has been extensively observed in number of process equipments where
Non invasive passive array technology for improved flow
O KEEFE C V MARON R FELIX J VAN DER SPEK A M and ROTHMAN P Non invasive passive array technology for improved flow measurements of slurries and entrained air The 4th International Platinum Conference Platinum in transition Boom or Bust The Southern African Institute of Mining and Metallurgy 2010 Non invasive passive
The power of passive sonar flow technology Flow Control
Passive sonar flow technology s capability to provide a real time entrained air measurement can be used to monitor and measure entrained air in a slurry Then an operator can take preventive action for increased cyclone recovery and correct errors in the density measurement for
Jameson cell Wikipedia
The high intensity of the Jameson Cell means that it is much shorter than conventional column flotation cells see Figure 1 and it does not require air compressors to aerate the suspension of ground ore particles and water known as a slurry or pulp in the flotation cell The lack of a requirement for compressed air and the lack of moving parts means that power consumption is less than for
EUCON AIR DOWN Euclid Chemical
EUCON AIR DOWN is a dry powdered defoaming admixture designed for use in plastic wet concrete or dry blended materials It decreases foaming and minimizes air entrainment in cement slurries grouts concrete and mortars It is also used to counteract the air entrainment caused by some cements and super plasticizers
Aerosol Entrainment from a Sparged Non Newtonian Slurry
modeled entrainment stemmed from application beyond the range of data used to develop the model A possible separation in entrainment coefficients between air water and steam water systems was identified A third entrain ment model was adapted to match experimental condi tions and fit a posteri to the experimental data resulting
SlurryAirSeparator Schlumberger
antifoaming fluids The SlurryAirSeparator mechanical cement slurry defoamer uses the hydrocyclone principle to separate entrained air from the cement slurry during the mixing process It can be used even with highly viscous slurries SlurryAirSeparator technology mechanically removes entrained air in the cement slurry mitigating
How to Reduce or Eliminate Air Entrainment Pumps Systems
Dec 15 2017· Read Jim Elsey s Most Common Reasons for Air Entrainment in Pump Systems here I didn t plan on writing about air entrainment again but recent field issues pushed me to revisit the subject In recent months I have been involved in four cases of misunderstood pump performance where air entrainment was determined to be the main culprit
Get the air out of that refrigeration system
Apr 07 2000· When air enters a refrigeration system it collects in the top of the condenser and is trapped Air is a noncondensable and thus it cannot be condensed like refrigerant vapors The liquid seal subcooled liquid at the condenser bottom will prevent air from leaving the condenser
Air Steam Separators Kadant
Air Steam Separators Separators remove up to 99 of contaminants in compressed air and steam systems enabling efficient reliable operation Three separation functions are integrated to remove fluid contaminants including rapid direction change expansion and filtration