Industrial equipment Brazed plate heat exchanger is a new type of high-efficiency heat exchanger made of a series of metal sheets with a certain corrugated shape stacked and brazed. Thin rectangular channels are formed between various plates, and heat is exchanged through the plates. Compared with the conventional shell and tube heat exchanger, its heat transfer coefficient is much higher under the same flow resistance and pump power consumption, and it has a tendency to replace the shell and tube heat exchanger within the applicable range.
Applications:
Refrigeration: used as condenser and evaporator
b. HVAC: intermediate heat exchangers used in conjunction with boilers, intermediate heat exchangers in high-rise buildings, etc.
c. Chemical industry: soda ash industry, ammonia synthesis, alcohol fermentation, resin synthesis cooling, etc.
d. Metallurgical industry: heating or cooling of aluminate mother liquor, cooling of steelmaking process, etc.
e. Machinery industry: cooling of various quenching fluids, cooling of reducer lubricating oil, etc.
Design Parameters
Flow range: 1-2000 m3/h
Working pressure: vacuum-8.2MPa
Operating temperature: -195-538C
Interface size: 1"-DN300 welding, flange, thread and other connection forms
Corrosion resistance: Welding seal without rubber gasket, choice of various metal and alloy materials, super corrosion resistance, longer service life.
Application field:
Crude oil, natural gas purification and chemical products; chemical industry; pharmaceutical and specific chemicals; injection control systems;
HVAC, district heating, thermal power plants; food processing; cooling tower heat recovery
Process requirements
Pickling temperature: Raising the pickling temperature is conducive to improving the descaling effect. If the temperature is too high, it will aggravate the corrosion of the pickling solution to the heat exchanger plates. Through repeated tests, it is found that the pickling temperature should be controlled at 60.
2) Concentration of pickling solution: According to repeated tests, the pickling solution should be prepared according to the concentration of formic acid 81.0%, water 17.0%, buffer 1.2%, and surfactant 0.8%, and the cleaning effect is excellent.
3) Pickling method and time: The pickling method should be carried out by a combination of static soaking and dynamic circulation. The pickling time is static soaking for 2h first, and then dynamic circulation for 3~4h. During the pickling process, samples should be taken frequently to test the pickling concentration. When the difference between the two adjacent test concentrations is less than 0.2%, the pickling reaction can be considered to be over.
4) Passivation treatment: After pickling, most of the scale and metal oxides on the surface of the plate heat exchanger will be dissolved and fallen off, exposing new metal, which is very easy to corrode. The sheet is passivated.
The Extruded Fin Tube also known as� Bimetallic Fin Tube� is one of the most preferred finning processes for various applications.
Manufacturing process:
Fin is produced by the rolling method (three-roll oblique rolling). Its working principle is: The smooth tube is lined with a mandrel, the tube material is driven by the roller blade to make a spiral linear movement, and is rolled by the roller. The hole pattern composed of the groove and the core rod is gradually processed with fins on its outer surface. In order to facilitate the formation of fins, the rolling parts adopt three stages of biting, rolling, and shaping during the deformation process, so that the processed fins are complete, smooth, and regular. The finned tube produced by this method is based on the base tube and the outer fin is an organic whole, so there is no problem of contact thermal resistance loss and electrical corrosion. It has good heat transfer efficiency and strong resistance to deformation. Extruded finned tubes consist of a light pipe and fins â??attachedâ?? to it. The structural parameters are mainly the inner diameter and outer diameter of the finned tube, the wall thickness of the finned tube, the fin pitch, the fin thickness and the fin height.
Material Options:
We offer the widest range of material in the industry and can extend it on request in case of special requirements for heat conductivity, mechanical properties or corrosion resistance. Below are our regular materials` combination.
A. Copper aluminum composite finned tube
B. Steel aluminum composite finned tube
C. Pure aluminum finned tube
D. Pure copper finned tube
Fin Height Options:
A. Low finned tubes
The fins of the low finned tube are extruded directly from the tube material. The fin height is only 1-2 mm. The common low fins are 1.6 mm in the shell- and-tube heat exchanger. This kind of finned tube does not need to consider the contact thermal resistance with the tube.
B. Middle finned tubes
The fin height of the finned tube is about 3.2 mm, which is often used in pressure vessel equipment such as shell and tube heat exchangers.
C. High finned tubes
The finned tubes are usually used in air heat exchangers, whose height is lower than 16mm, depending on working conditions.
D. Customized specification, please reach to us for more details.
Extruded Finned Tubes Characteristic:
A. High heat transfer performance and low contact thermal resistance
B. The contact area between fins and tubes is large, and the connection is tight and firm.
C. Good corrosion resistance, stable performance for long-term use.
D. Fins have good rigidity and are not easy deform.
E. Light weight and Low cost.
F. Low air resistance
G. Easy to clean
Details information
Description Hotplates
Heating working area 400x300mm158x118inch
Anticorrosion Heating working area coated can increase the corrosion functionpower cord covered in PFA tubeseparate design can makes the controller outside of the fume cupboard to avoid the acid corrosion4 feet with PFA tube can anticorrosion
Materials High quality graphite
Max use temperature 350C
Temperature control type PIDÂ temperature control digital display
Continue working time 48hÂ
OEM 1Heating working area
 2length of power cord and height of the feet
Features 1heating speed full uniform heating
 2high efficiencycan heat several samples at the same time
 3simple operation easy to use Long service life
Warranty  Within one year
Matching products utensilsbeakercrucibledigestion tubesample tankdigestion bottles ect
What is a spiral wound tube heat exchanger?
Spiral wound tube heat exchanger, also known as threaded tube heat exchanger, turbulent heat exchanger, double bellows heat exchanger. It is a new type of shell and tube heat exchanger. Each heat exchange tube is evenly wound in the heat exchanger shell according to a certain rule.
According to the different interface structure, it is divided into L type and Y type. According to whether it can be disassembled, it can be divided into detachable type and non-detachable type.
Type: Y type,T type,detachable,double tubesheet, cold trap, gas-liquid separation etc.
Material:austenitic stainless steel 316L, double-phase stainless steel 2205, 2507, pure titanium, zirconium, Hastelloy alloy, etc.
Tube type:Spiral wound tube/parallel tube/U type tube
Tube: �¦8ï¼?�¦10ï¼?�¦12, �¦14ï¼?�¦16,�¦19ï¼?�¦25etc.
Maximum working pressure:4Mpa
Heat exchanger area:0.1-1000 square meters
working temperature:-20-300 degree celsius (customizable)
Applicable fluids:steam, circulating water, frozen brine, glacial refrigerant, glycol;.
installation type:Horizontal/Vertical
Function:Heater, cooler, condenser, evaporate, distillation, rectification
Application:Distillation reflux system, concentration system, distillation system, waste gas and heat recovery system, traditional Chinese medicine extraction system, instantaneous sterilization at high temperature, CIP cleaning system, civil HVAC system,heating and cooling of process materials
Customization:According to the technical requirements of customers, we can accurately customize the winding tube heat exchangers with various spacing.
Package:Standard export wooden box,can be packaged according to customer requirements.
Advantages:
1.High heat transfer coefficient :Unique wound tube bundle optimizes the flow state of the fluid on both sides
2.Long service life spiral :The elastic tube bundle can effectively absorb stress and vibration, prolong the service life of the heat exchanger
3.Low scaling tendency :Thereâ??s no dead angle in the heat exchanger, and the tube side and shell side can be emptied; the high flow rate design of the shell side can effectively reduce the probability of scaling on the surface of the heat exchange tube
4.small floor space: Compact structure,about 1/5 of the traditional heat exchanger
5.Low operating cost : Under heat conditons ,it can save the steam ;under the condensation conditions,it can improve the recovery rate.
� Shandong Qinglei Environmental Technology Co.,Ltd is an equipment manufacturer integrating design, production and assembly. Our products include heat exchangers, heat exchange units, pressure vessels, storage tanks, TCU temperature control systems, reactors, distillation towers, VOCS purification and recovery systems, vacuum frying machine.
If you need any of them,please donot hesitate to let me know,I will reply you ASAP.
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What is a plate heat exchanger?
Plate heat exchanger is a new type of high efficiency heat exchanger composed of a series of corrugated metal sheets. Thin rectangular channels are formed between various plates through which heat is exchanged. Plate heat exchanger is an ideal equipment for liquid - liquid and liquid - steam heat exchange.
Plate material: 304, 316,316L, titanium etc
Thickness of plate:0.4mm-0.8mm
Sealing ring material : nitrile rubber (NBR), EPDM, fluorine rubber.
Overall heat transfer coefficient:3500-7500W/m�²�·K
Advantages:
1.Heat transfer conditions:It is especially suitable for liquid-liquid heat exchange with large flow and small temperature difference.
2.Thorough cleaning:All can be disassembled for thorough cleaning.
3.Easy to change the heat exchange area or process combination: By increasing or reducing a few plates, the heat transfer area can be increased or reduced.
By changing the plate arrangement or replacing several plates, the required flow combination can be achieved to adapt to the new heat transfer conditions.
4.Small in size :Compact and lightweight structure, small footprint, the floor space is one-third of the tube heat exchanger.
5.Light weight:The plate thickness of the plate heat exchanger is only 0.4~0.8mm, while the thickness of the heat exchange tube of the shell-and-tube heat exchanger is 2.0~2.5mm. The shell-and-tube shell is much heavier than the frame of the plate heat exchanger .The plate heat exchanger is generally only about 1/5 of the weight of the shell-and-tube type.
6.Low price: Using the same material, under the same heat exchange area, the price of the plate heat exchanger is about 40%-60% lower than that of the shell-and-tube type.Ã?Â
7.High heat exchange efficiency :The heat transfer coefficient is 3-5 times higher than that of the tube heat exchanger
8.Low heat loss: The heat recovery rate can be as high as 90% or more.
9.The logarithmic mean temperature difference is large, and end temperature difference is small.
Application
1.City heating
2.Inorganic chemical industry
3.Organic chemistry
4.Petroleum industry
5.Metallurgical industry
6.Food technology
7.Paper making process
8.Pharmaceutical industry
� Shandong Qinglei Environmental Technology Co.,Ltd is an equipment manufacturer integrating design, production and assembly. Our products include heat exchangers, heat exchange units, pressure vessels, storage tanks, TCU temperature control systems, reactors, distillation towers, VOCS purification and recovery systems, vacuum frying machine.
If you need any of them,please donot hesitate to let me know,I will reply you ASAP.
What is double tube sheet heat exchanger?
The double tube plate heat exchanger is a heat exchanger with two tube plates with a certain gap or equivalent to two tube plates with a certain gap at one end of the heat exchanger.
It is mainly used in the working conditions with high sanitary requirements. Its unique design makes it easy to completely empty and keep the heat exchange tube in a clean state and can provide greater heat transfer performance.
Material: All made of high quality stainless steel 316L
Standard: Designed and manufactured according to GMP requirements
Specifications of heat exchange tubes: 6,8,0 12, etc.
Tube surface roughness:
What is a tubular exchanger?
A tubular heat exchanger is used to warm or cool a product by exchanging heat between the process fluid and a service fluid,which is typically water, ice water, glycol or steam. The hot or cold service fluid flows around the tubes within the tubular heat exchanger and heat is transferred between the product and the media.
Type: U - tube heat exchanger, multi - flow heat exchanger,various specifications of tube heat exchanger can be customized.
Optional material: 304 stainless steel, 316L, two-way steel 2205, titanium, Hastelloy;
Optional pipe diameter: �¦19, �¦25, �¦32, etc.
Tube wall thickness: 1mm-3mm.
Operating temperature: -20�°C-203�°C;
Design pressure: -0.1MPa-1.0MPa;
Applicable fluids: steam, circulating water, frozen brine, glacial refrigerant, glycol;
Customization U - tube heat exchanger, multi - flow heat exchanger,various specifications of tube heat exchanger can be customized.
Application:Chemical, metallurgy, petroleum, salt, sugar, paper, pharmaceutical, desalination, refrigeration and other industries
Advantages
1.Low price
2.Good corrosion resistance
3.High temperature resistance
4.Good thermal conductivity
5. light body and small footprint
6.non-toxic
7.anti-scale
8.Easy installation and maintenance
9.Application widely
Shandong Qinglei Environmental Technology Co.,Ltd is an equipment manufacturer integrating design, production and assembly. Our products include heat exchangers, heat exchange units, pressure vessels, storage tanks, TCU temperature control systems, reactors, distillation towers, VOCS purification and recovery systems, vacuum  frying machine.
Any questions,please don't hesitate to let me know.
DBF series anti-corrosion temperature control digital display electric heating plate is also called anti-corrosion electric heating plate and Teflon coated electric heating plate. The surface is treated with imported high-quality PFA anti-corrosion coating, which is a professional experimental hot plate for sample heating, digestion, drying, boiling, and acid flushing. A variety of series and models are available for users to choose from. They can also be customized according to users' requirements. They are made with special technology to overcome the disadvantages of ordinary electric heating plates that are easy to be damaged due to long-term continuous work. It can meet the needs of chemical laboratories in different industries such as physics, chemistry, biology, environmental protection, pharmacy, food, beverage, teaching, scientific research, etc. for reagent heating.
characteristic:
1. The imported PFA Teflon coating is clean and never rusts. The anti-corrosion cast aluminum heating plate heats up quickly;
2. The panel and control box can be made into components, so that the acid mist during the experiment will not corrode the components in the control box, thus increasing the service life, and multiple samples can be processed at the same time without cross contamination;
3. Customized time setting function and segmented temperature control;
4. The exposed part of the power line is wrapped with PFA pipe to further prevent the corrosion of acid gas on components.
High temperature and corrosion resistant electric heating plate
The temperature controlled electric heating plate, also known as the anti-corrosion electric heating plate, is a professional experimental electric heating plate for sample heating, digestion, drying, boiling and acid flushing. Its surface is treated with imported high-quality Teflon coating and is not affected by strong acids and alkalis.
Product features:
1. Imported Teflon anti-corrosion coating, which can be wiped clean and never rust, and anti-corrosion cast aluminum heating plate heats up quickly.
2. Multiple samples are processed at the same time without cross contamination.
3. All pillars of DBF type electric heating plate are made of polytetrafluoroethylene to minimize metal parts entering the laboratory.
4. Customized time setting function, segmented temperature control, and processing of different boards as required.
5. The panel and control box can be made into components, so that the acid mist during the experiment will not corrode the components in the control box, thus increasing the service life, and multiple samples can be processed at the same time without cross contamination.
DBF series anti-corrosion temperature control digital display electric heating plate is also called anti-corrosion electric heating plate and Teflon coated electric heating plate. The surface is treated with imported high-quality PFA anti-corrosion coating, which is a professional experimental hot plate for sample heating, digestion, drying, boiling, and acid flushing. A variety of series and models are available for users to choose from. They can also be customized according to users' requirements. They are made with special technology to overcome the disadvantages of ordinary electric heating plates that are easy to be damaged due to long-term continuous work. It can meet the needs of chemical laboratories in different industries such as physics, chemistry, biology, environmental protection, pharmacy, food, beverage, teaching, scientific research, etc. for reagent heating.
characteristic:
1. The imported PFA Teflon coating is clean and never rusts. The anti-corrosion cast aluminum heating plate heats up quickly;
2. The panel and control box can be made into components, so that the acid mist during the experiment will not corrode the components in the control box, thus increasing the service life, and multiple samples can be processed at the same time without cross contamination;
3. Customized time setting function and segmented temperature control;
4. The exposed part of the power line is wrapped with PFA pipe to further prevent the corrosion of acid gas on components.
Design Code: ASMEVIII-I
Design Pressure: Up to 35 Mpa
Software:HTRI, PVElite & ANSYS
Material Code: From ASME & ASTM
Diameter Range: Up to 2 Meter
Length Range: Up to 20 Meter
Available Material:CS, SS, Alloy, High Alloy
Heat Exchanger Type:S&T, Double Pipe, Jacketed, Hairpin, Air fin cooler
We have hundreds of types of plate and gasket for your choice, with the most complete range, perfect quality and irresistible prices.
Used for maintenance and production
Plate material: SS304, 316L, Titanium, Nickel, 254Mo, Hastelloy
Plate thickness: 0.5mm, 0.6mm
Gasket material: NBR, EPDM, FPM, Silicone rubber
Food-grade material and other materials suitable for special working condition, like elevated or low temperature conditions, are also available.
Material Applicable Media
SS 304 pure water, river water, edible oil, mineral oil
SS 316L pure water, river water, edible oil, mineral oil
Titanium sea water, salt water, brine
Nickel high temperature or high concentration caustic soda
Mo dilute sulphuric acid, inorganic aqueous solution
Hastelloy concentrated sulphuric acid, hydrochloric acid, phosphoric acid
Material Temp. Applicable Media
NBR -15~+110 pure water, sea water, salt water, mineral oil
HNBR -15~+140 high temperature water or mineral oil
EPDM -25~+170 hot water, water vapour, acid, alkali
F.viton G -5~+180 acid, alkali fluid
Silicone Rubber -65~+250 low temperature and dry heat resistant
Asbestos -5~+250 food, oil, fat, alcohol
Our Transfer Printing Felt imported DuPont Aramid 1313, the middle Fabric for high-performance industrial silk fabric. It can work under 250degrees. After the use, the shrinkage of width is 3% max, the elongation is 3%, the weight is 3300g/m2, the thickness could be 8mm, and can also be customized thicker type according to customer's demand. The thickness could be 3600g/m2. Which is a special Blanket for transfer printing of various fabrics, curtain fabrics, and decorative fabrics. Specifications can be customized according to customer needs.
Transfer Printing Felt Application:
Our heat transfer printing belt is mainly used for various of roll to roll heat transfer printing machine, roller printing machine, etc.
Condenser and Heat Exchangers tube scaling is one of the most hardest problems in the industry. It results in decrease of productivity and efficiency of the plant.We provide cleaning technology prevents heat exchanger tubes from accumulating mud, scale, or biological fouling.
EQOBRUSH online tube cleaning System can control the generation of dirtSpecialized cleaning brushes can make every tube get cleaning. When the brush finish cleaning, they will come back to the basket where they are prepared for the next cleaning cycle. It can clean 4-6 times a dayyou can set the times according to real situation.
The advantages
Heat transfer continuously occurs at maximum efficiency
Online heat exchanger cleaning requires no process shutdown
Chemical-free â?? no chemical handling or disposal hassle
Fully automatic for effortless maintenance
It includes air heat exchanger, cooling tower, air cooler and so on; the equipments which transfer the thermal energy from the heat to the cold liquid are called heat exchange equipments. Heat exchange equipment is widely applied in petro-refinery, chemical engineering, light industry, pharmacy, machinery and food industry.
Ktt can deliver chemical engineering project in a turnkey model, in which equipment manufacture, installation, commissioning, and operation and long-term after-sale services can be included in the whole engineering package.
Business scope
We provide Chemical engineering project consulting,Designing, Equipment procurement, Installation, Commissioning, Operation Guidance, After-Sale Services etc. whole process services for following projects:
SOP Production Line/Potassium Sulfate Production Line/Plant
Calcium Chloride Production Line/Plant
Nitric Acid Production Line/Plant
Sulfuric Acid Plant/Plant odu ction Line/Plant
Chemical Equipment
In past years, we h ave completed more than 100 consulting, design, construction and general contracting projects locally and internationally; the projects spread in 20 provinces in China, Southeast Asia, Middle East and Africa.
Relying on application practices, HFM Fully Welded Plate Heat Exchangers are widely applied in oil and gas industry, refinery applications, pharmaceutical industry, chemical/petrochemical industry, automotive, pulp and paper industry and steel industry. The Semi-welded Plate Heat Exchanger is particularly offered for heating and cooling of aggressive media. Two corrugated plates are positioned back to back and welded together as "cassette" by laser, along the sealing groove designed for the gasket of the semi welded PHE. The semi-welded plate for PHE is specially offered for aggressive media. Generally, two pieces of PHE stainless steel plates are welded back to back by laser along the sealing groove for the gasket to form the plate cassette. Each cassette is sealed with a gasket. The refrigerant flows from one cassette to the other, contacting with only two of the four ring gaskets at the inlet and the outlet.What are the advantages of Semi-Welded Plate Heat Exchanger?1. Wide temperature range from -38 to 2002. Maximum design pressure up to 30 bar3. Rigid mechanical construction4. Outstanding leak-proof for high safety5. Capacity in handling aggressive media6. Adjustable size7. Compact structure and small installation space
Plate and Shell Heat Exchanger is designed as a performance upgrade over shell & tube heat exchanger and welded, brazed plate heat exchangers. This heat exchanger type supplies high thermal performance with compact size, similar to that of gasketed plate heat exchangers, with low hold-up volume and low installed weight, especially when filled. But it can be applied well when the operation condition is high temp and high pressure to which gasketed plate heat exchangers cannot be applied.The heart of the Plate and Shell Heat Exchanger is its heat transfer element, also called the plate core/package, composed of round or oblong chevron-type plates welded into a cassette.What are the advantages of Plate and Shell Heat Exchanger?High heat transfer & Low foulingCompact structure & No gasketHigh pressure & High temperatureSmall terminal temperature difference & Low pressure drop Table. Parameters of HFM Plate and Shell Heat Exchangers ModelWW1DD1LPlate+TubeShell+TubeHPS1624098250168.3N*2.4+2DN15DN(15-80)HPS22448134.6310219.1N*2.4+3DN20DN(20-100)HPS46469174368269N*2.4+4DN40DN(25-200)HPS72565277460355N*2.8+4DN50DN(25-300)HPS128600298694464N*2.8+6DN80DN(25-350)HPS179693338725559N*2.8+6DN100DN(25-400)HPS647152065012501016N*3.2+6DN150DN(25-700)HPS1200182890015481372N*3.2+8DN300DN(25-1000)HPS16002098100018381562N*3.2+8DN350DN(25-1200)
Brazed Plate Heat Exchanger is small, light and compact. It does not need gaskets.Instead, it is brazed together using cooper to give a strong, compact construction.This heat exchanger is especially suitable for pressure up to 50 bar and temperatures from -196 to +550.What are the advantages of Brazed Plate Heat Exchanger? High heat transfer efficiency Compact structure Easy installation Easy Deinstallation DurabilityTable. Parameters of HFM Brazed Plate Heat Exchanger Model NoWidthHighthThicknessHole Center DistanceMax PressureMax Flow RateWeightHFQ10762069+2.3n172*421/3/4.58.00.7+0.06nHFQ15801909+2.3n154*401/3/4.58.00.7+0.06nHFQ25A783189+2.3n282*423/4.58.01.0+0.08nHFQ25B863159+2.3n269*403/4.58.01.0+0.08nHFQ3011131010+2.36n250*503/4.5181.3+0.12nHFQ3512430413+2.4n250*703/4.5182.2+0.16nHFQ3612228211+3.1n227*523181.88+0.104nHFQ50A11152510+2.35n466*503/4.5182.6+0.19nHFQ52B11152510+2.35n466*503/4.5182.6+0.21nHFQ60A11952610+2.24n470*633/4.5182.379+0.194nHFQ60B11952610+2.24n470*633/4.5182.379+0.194nHFQ90A19161611+2.35n519*923/4.5427.8+0.36nHFQ90B19161611+2.72n519*923/4.5427.8+0.44nHFQ10024849610+2.15n405*1573/4.5426.5+0.37nHFQ125A24652813+2.36n456*1743/4.5427.2+0.52nHFQ125B24652813+2.36n456*1743/4.5427.2+0.52nHFQ18030769613+2.76n567*3071.5/2.110010+0.51nHFQ21032173813+2.7n603*1881.5/2.110013+0.75nHFQ210A32173813+2.7n603*1881.5/2.110013+0.75nHFQ23032273913+2.55n631.7*205.23/4.510013+0.82nHFQ600429139822+2.78n1190*2201.5/2.130031.8+1.73n
It includes air heat exchanger, cooling tower, air cooler and so on; the equipments which transfer the thermal energy from the heat to the cold liquid are called heat exchange equipments. Heat exchange equipment is widely applied in petro-refinery, chemical engineering, light industry, pharmacy, machinery and food industry.
Ktt can deliver chemical engineering project in a turnkey model, in which equipment manufacture, installation, commissioning, and operation and long-term after-sale services can be included in the whole engineering package.
Business scope
We provide Chemical engineering project consulting,Designing, Equipment procurement, Installation, Commissioning, Operation Guidance, After-Sale Services etc. whole process services for following projects:
SOP Production Line/Potassium Sulfate Production Line/Plant
Calcium Chloride Production Line/Plant
Nitric Acid Production Line/Plant
Sulfuric Acid Plant/Plant odu ction Line/Plant
Chemical Equipment
In past years, we h ave completed more than 100 consulting, design, construction and general contracting projects locally and internationally; the projects spread in 20 provinces in China, Southeast Asia, Middle East and Africa.
628 Heat Exchangers Suppliers
Short on time? Let Heat Exchangers sellers contact you.
