YC-210 Wiped Film Evaporator for Food & biological product

  • It’s a new type of Wiped Film Evaporator – Flash Evaporator, and it is usually used in laboratories to replace rotary evaporators. Because of its non-stop input and output of materials, the equipment is more efficient and can be used in more circumstances.
  • It is used for efficient, quick concentration of heat-sensitive materials.
  • It has a simple structure that is very stable and reliable. Staff at the labs can comfortably operate it with only one hand.
  • It requires a very short concentration time (less than 30 seconds), which means the materials are heated only for a short time, so it’s really suitable for heat-sensitive materials.

Pilotech YC-210 Wiped Film Evaporator for Medical & Food et.c

YC-210 Wiped Film Evaporator The wiped film flash evaporator haves the advantages of falling film and scraped film technology to make the material liquid flow downward along the heating tube wall in the form of a film under the action of the scraper for heat transfer and evaporation. The advantages are high heat transfer efficiency and fast evaporation speed. The material residence time is short, and according to the relationship between the speed of liquid gasification and temperature, pressure and surface area, various factors are well matched in a vacuum state, thereby forming a new vacuum direct current, continuous liquid injection, and instant evaporation. A new generation of rapid concentration equipment for Chinese herbal medicine extract.

Sr.noParameterPilotech YC-210 Wiped Film Evaporator
1Power3KW ,220V ,50/60Hz
5Evaporation area0.06M2
5Condensation area0.5M2
6Feeding methodNeedle valve
7Scraper speed100-1200RPM (Stepless)
8Temperature controlPID control
9Heating precision±1⁰C

Wiped Film Evaporator

In the past, when you wanted to concentrate a biological product or a liquid herbal extract, you normally would use a rotary evaporator. You can see that, after years of development, new versions of rotary evaporators are handier than before, yet they still have the disadvantage of slow concentration and long heating time.

Therefore, rotary evaporators are not suitable for high viscosity materials, especially those that are prone to foam during the concentration. Pilotech Wiped Film Evaporator is an effective instrument to solve the problems.

Yes, you have a new choice now, one that can significantly increase your efficiency– Pilotech Wiped Film Evaporator.

The biggest difference between Pilotech Wiped Film Evaporator and rotary evaporator is that Pilotech can take in the original materials continuously so that the materials don’t have to stay in the heating container for a long time.

Pilotech Wiped Film Evaporator can be used for rapid concentration, crystallization, and desiccation of medical, chemical and biopharmaceutical materials, as well as the quick recovery of organic solvents.

Due to the advantages in wiped film and falling film, Pilotech Wiped Film Evaporator scrapes the fluid material to make it flow like a film down the wall of the heating tube to be heated and evaporated. The heat transmission is efficient and evaporation is fast, so that the material stays in the heating device for just a short time.

Besides, Pilotech makes a comprehensive consideration of elements like the speed of evaporation, the temperature, the pressure and the surface area, combines them properly in a vacuum state so that the new type of herbal extract concentrator can achieve the effect of vacuum direct flow, non-stop input of fluid and instant evaporation.

Therefore, Pilotech Wiped Film Evaporator is especially suitable for the concentration of biological products that may dissolve or denature easily in a high temperature. Even if your materials are prone to foam during the concentration, or they are pretty viscous, this instrument can still concentrate them quickly.

Pilotech Wiped Film Evaporator uses a specially made and formed glass that is easy to clean and corrosion resistant.

With the use of Pilotech Wiped Film Evaporator, the fluid to be concentrated leaves the heating device just 30 seconds after it enters the system, thus minimizing the damage to the active ingredients due to prolonged heat exposure.

Because of its non-stop input of materials, Pilotech Wiped Film Evaporator is especially suitable for concentrating solutions in large quantities. The whole process includes the liquid input control, evaporation separation and recovery of concentrates and solvents.

Pilotech Wiped Film Evaporator is most suitable for the concentration, purification, decolorization, deodorization, and degassing of heat-prone materials and materials that are easy to foam or highly viscous.

Every Pilotech Wiped Film Evaporator has undergone rigorous testing before leaving the factory to ensure that the machine’s performance is stable and meets our strict factory standards. To be specific, every piece of Pilotech’s concentrator has undergone 72 hours of uninterrupted operation testing before leaving the factory.

We recorded a video tutorial about the operation of the instrument, so you will be able to quickly learn to operate Pilotech Wiped Film Evaporator after you receive it. Even if you are a complete novice, you don’t need to worry about the proper use of the instrument.

Wiped Film Evaporator: The Ultimate FAQ Guide

In this guide, you will find all information you’re looking for about wiped film evaporator.

So, if you want to be an expert in wiped film evaporator, this is the right guide for you.

Let’s dive right in.

What is a Wiped Film Evaporator?

Wiped film evaporator is a contraption you employ in the purification process of liquid substances of different viscosities.

You use the wiped film evaporator to isolate components of mixtures while also providing reduced time intervals when heating.

You find the wiped film evaporator referred to differently, including as thin-film evaporator, falling film evaporator, or scraped film evaporator.

You can also employ the WFE in the condensation process and decolor, oxidate, degas, trip, and react heat-sensitive materials.

What is the Structure of a Wiped Film Evaporator?

The design of a wiped film evaporator is such that it spreads a thin liquid film on a metallic wall.

Concurrently, you have a heat energy supply on the reverse side of the metallic wall.

The structure of the wiped film evaporator is dependent on the device that develops the thin film.

You note this device is mechanical and can work with a variety of liquid compositions.

Using a WFE, you can work on highly viscous liquids and liquid formations with solid particles’ presence.

Additionally, where you have reduced fluid properties, the WFE is handy when wetting the metallic plate.

You find many WFEs with a vertical cylinder construction and an internally-based distribution of material.

The movement of the liquid along this vertical structure allows the wipers to distribute it across the plate thinly.

You can employ this kind of WFE at reduced pressure levels while ensuring the pressure drop is minimal.

You have a dual wall evaporator jacket under a continuous heating process in the structure of the WFE.

There is also a vacuum system in your WFE consisting of multiple pumps combined working together.

These pumps reduce the levels of pressure in the chamber where distillation occurs.

The temperature of the distillation chamber determines the amount of eliminated vapor to the condenser via a discharge nozzle.

You discharge substances with reduced volatility at the base of the evaporator.

You find a WFE structure such that it can function as a detached purifier unit.

Alternatively, a WFE can function as part of a unit, such as in a distillation pillar as a reboiler.

What is the Function of Wiped Film Evaporator?

The primary function of a wiped film evaporator is to eliminate liquids in a solution.

The WFE employs a three-pronged transfer of heat, separation of liquid and vapor, and energy efficiency.

When measuring the functionality of a wiped film evaporator, several factors are necessary.

The subsequent paragraphs discuss some of these factors.

The heat transfer to the concentration should be sizable with only a reduced contact area of the metal surface.

You note that this specification influences the size and type of the WFE alongside its cost.

When separating the liquid and vapor, you need to undertake the least process and equipment necessary.

During separation, you need to ensure minor product loss, reduced pollution, and deterioration of equipment you employ.

When using wiped film evaporator, you desire high energy efficiency, which you observe through the steam economy.

You measure steam economy by comparing the amount of liquid you evaporate and the steam you employ.

Also, you employ heat in the temperature appraisal of the feed material to the liquid constituent’s boiling point.

You separate the liquid through vaporization, and you can achieve energy efficiency by employing the vaporized content in heating.

While employing the WFE, you can adhere to the condition of the solvent or solvent mixture. Essential factors you consider include the deterioration ability, the quality, the amount of salt, and the uniqueness in structure.

What are the Parts of a Wiped Film Evaporator?

Parts of Wiped Film Evaporator

Parts of wiped film evaporator

The main parts and components of Wiped Film Evaporator include:


The still is the main columnar section of the WFE, consisting of the wiper blades and inner condenser where distillation occurs.

Drive Units

The drive units consist of shafts with large diameters that allow your evaporator’s rotor blades to over-hang.

You therefore, require no bottom bearing with the capability to replace the mechanical seal minus removal of the units effortlessly.

Entrainment Separators

These separators ensure you achieve quality products by averting the entrainment of the solvent during vaporization.

Internal Condensers

When you employ an internal condenser in your WFE, you augment the separation process by enabling molecular distillation.

Wiper Blades

Wiper blades enable agitation of the material, forming thin films while enhancing heat transfer rate and evaporation.

What is the Operating Principle of a Wiped Film Evaporator?

When using the wiped film evaporator, consider the vertical configuration where material flows downward.

The material enters the device from above, where you have a heating zone.

The material gets in contact with the evaporator and a distributing mechanism that ensures even distribution of heat energy.

Thereafter, it heads to the scraped device of the rotating film, where it transforms into a uniform film of liquid.

Also, the material travels further downwards as the rotating film works in continuous operation, allowing a turbulence flow of elevated speeds.

Operating reduces the coking chances of the liquid film and scaling caused by heating, increasing the overall coefficient.

The lighter material converts to steam during evaporation, where it escapes to the separator before entering the condenser.

Besides, the heavier material releases via the base of the evaporator.

The distributing equipment in a WFE ensures uniform distribution of feed material to the metallic wall surface.

It also reduces the splashing levels in the evaporator section and sprinkling during the flow of steam.

With such a device, you find no flashing of charging material and elimination of foaming. Furthermore, it ensures evaporation only occurs along the heated metallic surface and not anywhere else.

You also have a centrifugal separator attached and marched according to material properties to the scraped film evaporator.

You find this feature separates the solvent in the vapor leading to the distributing element.

What are the Applications of the Wiped Film Evaporators?

Application of Wiped Film Evaporator

 Applications of wipe film evaporator

When using Wiped Film evaporators, you need to ensure you have low thermal deterioration with reduced time and thermal constraint.

The characteristics of the feed material also influence the working of the evaporator and the efficiency levels you can experience.

You employ the wiped film evaporator in various applications, including:

  • Minimizing product volumes to accommodate more economical packaging, storage, and shipping. This applies in products such as sugar, juice, milk, and salt.
  • The wiped film evaporator allows you to extract pure products from their concentrations, such as sugar from cane syrup.
  • You can use the wiped film evaporator to eliminate impurities and contaminants from substances. You can separate salt from caustic soda using this process by dissolving and evaporating in sodium hydroxide.
  • You can use a wiped film evaporator to concentrate waste products allowing for their simplified removal disposal. You commonly employ this evaporation process for nuclear waste and dye removal.
  • Waste conversion using an evaporator is possible such as making animal feed from the remains of slop used in making alcohol.
  • A wiped film evaporator can be helpful in the extraction of freshwater from impure concentrations. Such concentrations include salty and hard water.
  • A wiped film evaporator is effective in the molecular distillation of various products. Some of these products include mono-glycerides, triglycerides, esters, and fatty acids.
  • You can employ evaporators in oil isolation and deodorization in nutraceutical use, such as vitamin extraction.
  • When making food concentrates such as fruit purees and broths, you can employ the wiped film evaporator.

Which Industries Use Wiped Film Evaporator?

The use of the wiped film evaporator is present in various industries allowing a diverse nature of the application.

You can employ the wiped film evaporator in these industries to carry out purification, concentration, and deodorization:

  • Food processing and beverage industry
  • Pharmaceutical industry
  • Nutraceutical industry.
  • Fine and oleo-chemical industry

What are the Principle Requirements for a Steam-Heated Wiped Film Evaporator?

When employing a wiped film evaporator that is steam-heated, you have three principle requirements, which include:

  • The amount of heat energy you transfer to the solvent should be sufficient to vaporize it.
  • You need to have adequate separation of the liquid remnant and evaporate.
  • The evaporation process and resulting separation should be highly efficient in terms of energy use.

How do you Select A Wiped Film Evaporator?

When selecting the wiped film evaporator, there are various aspects you consider. Some of these aspects encompass the following:

  • The capacity of the evaporator and data related to its operation, such as feed material amount, concentration, and operating temperature. Also important alongside these are the duration of use, product changes, and automation capability.
  • The properties of the material feed such as viscosity, tendency to form, sensitivity to heat, fouling, and behavior during boiling.
  • The media necessary for operation including heat sources such as steam or electric power. You also need water for cooling, a cleaning agent, and an assortment of replacement parts in case of breakdown.
  • The budgetary needs that you attach to the cost of acquiring and operating the wiped film evaporator.
  • The type of material used in the construction of the evaporator and the nature of the surface finish.
  • The available space to accommodate the wiped film evaporator and prevailing conditions. You also need to consider the connections provided in the available space, such as power.
  • The legal guidelines for using the wiped film evaporator. Policies can cover safety and environmental concerns such as pollution, sound, and prevention of accidents.

How does the Wiped Film Evaporator Compare to The Film-Type Evaporator?

The wiped film evaporator is, in essence, an example of a film-type evaporator.

The characteristic feature of the film type evaporator is the formation of a thin film of liquid on the evaporator surface.

In a thin-film evaporator, you allow material feed in from the top with a unique set-up distribution system.

While you have different configurations, you commonly find a punctured plate fitted above the tube sheet.

A thin film evaporator offers you impressive thermal performance even when you have low-temperature gradients.

Furthermore, the separation of the vapor and the liquid desiccant is exceptional.

What Rotor Types can you Use on the Wiped Film Evaporator?

When using a wiped film evaporator, the rotor blades allow you to distribute and agitate the feed material in the chamber. Common blade types you can employ in a wiped film evaporator are:

Rigid Blades

The rotor with rigid blades has these blades fixed and at an accommodative clearance of the wall surface.

Hinged Wiper Blades

Such a rotor has its blades wiping the surface of the shell when heated. Furthermore, the centrifugal force experienced causes the blades to swing outwards.

Roller Wiper System

With this kind of rotor, you note creating a thin liquid film that self-adjusts to diverse thicknesses.

  1. Scraper Block Rotor
  2. Smith Rotor

What are the Benefits of Using a Wiped Film Evaporator?

You find the following benefits in employing a wiped film evaporator:

  • You experience reduced degradation of the material due to the limited retention time. When using a wiped film evaporator to prepare material, you find reduced heat fluctuation that reduces material degradation.
  • Improved efficiency by employing a low vacuum pressure that lowers the material’s boiling point. Consequently, you achieve higher temperature gradients in your evaporator, increasing thermal efficiency.
  • When you use a wiped film evaporator with a floating wiper, you achieve the constant formation of a thin film.

You observe wipers are essential in the creation of turbulences on the evaporator surface in the preferred thickness.

  • Wiped film evaporators have reduced maintenance needs and associated costs of operating.

You achieve evaporation at low speeds of rotors which ensures there is minimal vibration and consequently mechanical wear.

  • The energy efficiency of the wiped film evaporator is high as you can achieve evaporation at low rotor speeds.

Consequently, you require very little energy to power the motor driving the rotors.

What are some of the Technical Features of a Wiped Film Evaporator?

Some of the technical features you find with a wiped film evaporator include:

  • Use of very low operating pressure from about 0.013 mbar.
  • Internal condensers with different surface area to accommodate the condensation process and sub-cooling.
  • Adaptive entrainment separators useful when conducting high vacuum work.
  • Wiped film evaporators with expandable capacity that allows for increases with reduced modification.
  • Rotor blades mounted on springs where the feed material has viscosities exceeding 2,000 cps.
  • A maximum working viscosity of about 20,000 cps when at working temperature.
  • A wide capacity range of the material feed from a few kilograms per hour to thousands.
  • Different construction materials, including steel variant, titanium, and glass.
  • Different rotor speeds determined by the WFE size, such as 60 rpm and 280 rpm.
  • Reduced rotor speeds allow the use of motors with low power.
  • A maximum operating temperature of over 350 0

How do you Cool a Wiped Film Evaporator?

You can achieve cooling in a wiped film evaporator via two primary techniques:

Air Cooling

In this process, you employ an airflow to cool the evaporator surface by conducting heat away. You can use a natural air stream by exposing the evaporator to the atmosphere or employing fans or blowers.

Using fans or blowers to initiate the airflow process is forced conduction and whose speed is adjustable. Consequently, you can determine the quantity of heat removed by increasing the speed of fan rotation.

Water Cooling

When cooling the evaporator using water, you pass cold water through coils on the surface of the evaporator.

You observe a heat transfer from the evaporator surface via the coil into the water.

You cool the hot water, after which you pump back the cold water to repeat the process.

The process is highly efficient with low associated costs since you recycle the water making a continuous, uninterrupted cycle.

What Factors Affect the Rate of Evaporation in a Wiped Film Evaporator?

The following factors affect the evaporation process in a wiped film evaporator:

  • Operating temperature influences the amount of liquid you evaporate where the relationship is direct.
  • Larger the surface area of evaporation, the large the liquid quantity you evaporate.
  • When you agitate your solution, you increase the rate of evaporation.
  • Evaporation rate is indirectly related to the atmospheric and aqueous vapor pressure of the atmosphere.
  • Properties of your product, such as density and viscosity, influence the rate of evaporation.

What Features should you look out for in a Wiped Film Evaporator?

When purchasing a wiped film evaporator, you need to ensure it entails the following features and aspects:

  • The wiped film evaporator should be capable of effective heat transfer rates with a reduced contact area. Such capacity allows you to maintain a low cost of operation and maintenance of the evaporator.
  • During operation, the wiped film evaporator should conveniently isolate the vapor and liquid desiccant.
  • The technical aspects of the evaporator should be conducive to the evaporation of a particular material feed.
  • The wiped film evaporator should be capable of delivering the desired quality of extract from the feed.
  • Using this apparatus, energy utilization should be efficient, allowing various use of steam and vapor.
  • Your wiped film evaporator should exhibit reduced fouling which is transient to heated evaporator surfaces.
  • The material composition used in the construction of the evaporator should possess high corrosion-resistant property.

What Factors Influence the Evaluation Criteria of a Wiped Film Evaporator?

You identify the following factors to influence the criteria of evaluating a wiped film evaporator:

  • Time you require to ensure a sustained product formation and reduce wastage during the process.
  • Least amount of product the evaporator can accommodate when not in operation to reduce wastage.
  • Residence time should be short to reduce the deterioration of the product.
  • A minimized occurrence of fouling extends the downtime period undertaken during the cleaning process.
  • Possibility of carrying out maximum extraction of material from concentrates and recycling of the residue.
  • Ability to adjust volatility to lower values, especially where the mass material feed consists of the desired product.

Can you Use a Rolled Film with a Wiped Film Evaporator?

Yes, you can, when you use a rolled film for your WFE, you employ stacked rollers on a rod to enhance retainment.

You also positively influence the service life of the wipers.

Why is Using an Internal Condenser in WFE Important?

An internal condenser in your WFE enables you to reduce the pressure drop.

You observe a high vacuum creation and closeness to the evaporator surface, ensuring precise separation and a complete condensation process.

What is the Difference when Using an External Condenser rather than an Inner Condenser with the WFE?

When using an internal condenser, you have a reduced pressure drop due to the proximity to the evaporator surface.

The pressure drop with an external condenser is significant due to the distance between the condenser and the evaporator surface.

Why should you Use Low-Speed Rotors in a Wiped Film Evaporator?

Using low-speed rotors, you reduce the wear of the wiper blades and drive system extending their longevity.

Consequently, you reduce the operation costs by also lowering the power needs in terms of horsepower.

Can you have an Expandable Wiped Film Evaporator?

Yes, you can. An expandable WFE allows you to add extra thermal units above the standard unit to augment the device’s capacity.

Can you Employ the Wiped Film Evaporator in High Vacuum Operations?

You can use the WFE in high vacuum operations up to a single micron unit.

Working at such levels reduces the working temperature while thwarting temperature-induced deterioration of the feed material.

 Internal Condenser of Wiped Film Evaporator

Internal condenser of wiped film evaporator

What is Short Path Distillation about Wiped Film Evaporators?

Short path distillation is a configuration that positions the evaporation surface of a feed close to the re-condensing point.

Consequently, you observe a reduced pressure drop between the two areas allowing for effective evaporation and sub-cooling.

Concerning a WFE, you exhibit short path distillation by reducing the distance between the evaporator surface and the inner condenser.

The separation is typically only a few centimeters allowing direct movement of distilled matter from the evaporator to condenser.

What Material do you Use to make the Wiped Film Evaporator?

You find two common materials helpful in constructing a WFE: Carbonized and stainless steel variants and Reinforced Glass.

Glass is suitable for small devices, while steel is helpful in large devices due to its thermal performance and sturdiness.

How do you Control the Temperature in a Wiped Film Evaporator?

Controlling the temperature of a WFE is essential due to the different temperature zones in the device.

You can employ various mitigation features to aid in temperature control allowing efficient operation.

Some of these features include:

  • Using different heating strategies such as jacketing and employing electric wraps.
  • You can employ chilling by using unique coolers.
  • Utilizing dry ice at the cold trap to instigate chilling.

Can you have a Wiped Film Evaporator with Multiple Stages?

A WFE with multiple stages encompasses multiple evaporators arranged sequentially.

You find these stages eliminate the need for executing several cycles in a single-stage configuration which is exhaustive.

Furthermore, multiple stages retain the feed material within the system preventing prolonged atmospheric exposure.

You note that sustained exposure causes the degradation of some compounds by external factors such as light.

Are there Limitations to Using Wiped Film Evaporator?

The wiped film evaporator has several advantages making it one of the most popular evaporators in use. However, it has a few limitations as follows:

  • The performance of the WFE is specific to the distributor with high requirements for aspects such as design and installation.
  • The precision levels for the WFE are high, ensuring a small film thickness without overly wetting the heat source.

Consequently, you need highly accurate measurements of the feeding rate and length of the evaporator surface.

  • The cost of acquiring and installing a wiped film evaporator is high due to the design and construction sophistications.
  • The performance of a wiped film evaporator where the feed material has a large composition of solid matter is underwhelming.

Depending on your unique requirements and specifications, Pilotech designs and manufactures a range of wiped film evaporator machines.

Contact us now for all your wiped film evaporators.

Send Inquiry Now!

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