Just fill in the form below, click submit, you will get the price list, and we will contact you within one working day. Please also feel free to contact us via email or phone. (* is required).

types of indirectly heated tube drum dryers

  • Büttner - Drying Systems - Heated Drum Dryers - Indirectly ...

    0. Drying systems for fine bulk solids – designed to work with cogeneration systems (CHP). Büttner's indirectly heated tube drum dryers are specifically designed to work in combination with cogeneration systems (CHP). They function as reliable and efficient dryers for wood chips and other finely dissolved and free-flowing wood material, biomass ...

    Get Price
  • EXPERTS IN ENERGY AND DRYING

    2017-5-9 · types of dryers are indirectly heated with turbine exhaust steam and are therefore an excellent complement to a cogeneration system's heat utilisation. BÜTTNER ensures optimally dried materials for particle board production with smooth interaction between burner system, flash tube pre-dryer and single-pass drum dryer.

    Get Price
  • Drying & Cooling Equipment - Allgaier Process Technology

    Indirectly heated rotary kiln dryers are used for temperature control and calcination at temperatures up to 600 °C. This style of drum dryer is especially effective at recovering heat energy when used for cooling very hot solids from calcination drums and rotary kilns. Allgaier drum dryers are also capable of simultaneous product cleaning.

    Get Price
  • Dryers - Visual Encyclopedia of Chemical Engineering

    One of the most common types of indirect-heat rotary dryers is the steam-tube rotary dryer, shown below. It consists of a slowly rotating, almost horizontal shell with heat-transfer tubes along the outside walls. Steam enters the heat-transfer tubes through an …

    Get Price
  • Rotary Dryers - FEECO

    2003-8-26 · Among the three types, single and double drum dryers are most commonly used for fruits and vegetables. For example, large quantities of mashed potato flakes are produced using single drum dryers with specially designed roll feeding system. Double drum dryers are used in California to dry tomato paste. Twin drum dryers

    Get Price
  • BÜTTNER - Energy Systems, Burners & and Drying Systems

    The rotary drum is partially enclosed and externally heated by a series of burners mounted in an insulated stationary chamber or jacket. Ideal for materials which require medium or low temperature, Indirectly Fired Calciners are used for drying dusty, fine or heat sensitive materials.

    Get Price
  • Drum Drying - Washington State University

    2001-11-26 · pneumatic dryers, fluid beds, etc. where discrete particles can be brought into contact with the hot gas. This produces rapid heat transfer with correspondingly short drying times. Batch type fluidized bed dryers have, therefore, superseded forced convection units in many cases – notably in the drying of pharmaceuticals and for the

    Get Price
  • ROTARY DRYER – Saka

    2018-9-11 · Lift clothes in the wave drum to help preserve their natural softness and colour; Check out the Hotpoint Aquarius condenser tumble dryer Heat Pump Condenser tumble dryer. In a nutshell: The most energy efficient of tumble dryers, featuring ultra-quiet performance and top notch clothing care

    Get Price
  • Process Dryers Selection Guide: Types, Features ...

    2020-1-29 · A dryer is used for the evaporation of liquids from solids. Most types of dryers are indirectly heated with either an internal exchanger coil or an external heat transfer jacket.Genesis offers different types of drying systems depending on the nature of products to be dried and the characteristics of the required dried product.

    Get Price
  • GENESIS ENGINEERING & THERMAL SOLUTIONS CO.

    2003-8-26 · Among the three types, single and double drum dryers are most commonly used for fruits and vegetables. For example, large quantities of mashed potato flakes are produced using single drum dryers with specially designed roll feeding system. Double drum dryers are used in California to dry tomato paste. Twin drum dryers

    Get Price
  • Drum Drying - Washington State University

    2017-5-7 · The dryer comes in two types: 1.2.1 The single drum dryer 1.2 Equipment Depending on the design, the product is applied continuously as a thin film at the bottom or on top of the main drum. As the drum rotates and is heated on the inside, the product dries on the outside of the drum surface. The short exposure to a high

    Get Price
  • Classification and Application of Rotary Drum Dryer

    Details: These single-pass dryers are utilised for drying wood chips, OSB strands, beet pulp as well as all types of free-flowing wood material, biomass products and other bulk solids. Depending on the product, a water evaporation capacity of up to 80 t/h. Heated directly by multi-fuel burners in combustion chambers.

    Get Price
  • DRUM DRYER - Teknol

    2019-11-20 · FRYER TYPES Once all the criteria for a fryer have been evaluated, the fryer type must be considered. There are two basic types of fryers: direct-heated and indirect-heated. Direct-Heated Fryers: Direct-heated fryers use the natural convection current of the heating mechanism to heat the cooking oil. The heating fins, tubes, or rods are fully

    Get Price
  • Büttner - Drying Systems - Heated Drum Dryers - Directly ...

    2018-8-8 · conductive dryer types of introduction. Conduction drying is also called contact drying, very suitable for wet particles, and conduction dryer thermal efficiency is higher. The evaporated water vapour or organic solvent is extracted by vacuum or discharged by a small amount of air, which is the main carrier of moisture content.

    Get Price
  • Thermal Processing Ingenuity: Drying with Steam

    Moreover, the available configurations assume that the sorbent in the indirectly-heated calciner is fluidised either by CO 2 released during calcination (self-fluidisation) (Junk et al., 2013(Junk ...

    Get Price
  • Process Dryers Selection Guide: Types, Features ...

    INDIRECTLY HEATED ROTARY TUBE BUNDLE DRYERS Drying systems for bulk solids – designed to work with cogeneration systems (CHP) Büttner's indirectly heated rotary tube bundle dryers (also known as 'wood chip dryer') are specifically designed to work with cogeneration systems (CHP). They provide reliable and efficient drying of wood chips and ...

    Get Price
  • Rotary dryer - Buettner

    2020-7-30 · Drum Dryer In drum dryers a liquid containing dissolved solids or slurry carrying suspended solids forms a thin layer on the outside surface of a large rotating drum. For a single drum unit thickness of the film can be controlled by an adjustable scraping blade. In case of a double drum unit thickness can be controlled by the gap between the drums.

    Get Price
  • Rotary Dryer RVD - Steam Tube Dryer and Freeze Dryer

    The Komline-Sanderson Paddle Dryer Processor is a highly efficient, mechanically agitated, indirect heat transfer device for adding or removing heat from a process mass. Dual counter-rotating shafts with unique intermeshing wedge-shaped paddles produce intimate mixing, uniform heat transfer, a high heat transfer rate, and a self-cleaning effect.

    Get Price
  • Classification and Application of Rotary Drum Dryer

    The Full Ring Dryer is a multi-pass, pneumatic type drying system with a multi or single stage classifier for selectable particle residence time which offers gentle drying due to its overall short residence time. The dryer can be either indirectly heated (steam, thermal oil, waste heat or natural biogas) or directly heated (waste heat or natural biogas).

    Get Price
  • Types of dryers - DAV University

    Rotary drum dryer adopts slightly tilted drum which can be rotated. The wet materials are sent to hopper of rotary dryer by belt conveyor or bucket elevator from the higher side, and well-dried materials are collected from the other lower side, and hot air enters the drum from the feeding side or discharging side according to user needs.

    Get Price
  • Paddle Dryer/Processor | Komline-Sanderson

    Drying equipment uses various methods to remove moisture from and preserve a product. Common in the pharmaceutical and food industries, dryers employ methods such as freezing, vacuum, heat, and more. Most types of dryers are indirectly heated, and many operate under a …

    Get Price
  • Ring and Flash Dryers - VETTERTEC - PASSION FOR DRYING

    2020-5-26 · Rotary dryers are widely used in food, feed, chemical, pharmaceutical, mining and other industries. The working process of the equipment is as follows: After the dewatered wet material is added to the dryer, the material is evenly dispersed in the dryer and fully contact with hot air under the rotation of the plate reader which is evenly distributed in the drum, accelerating …

    Get Price
  • Rotary Dryers Coolers and Calciners

    2021-6-25 · Indirectly Heated Units Indirectly Heated Rotary Dryers and Calcinersare available for dusty, finely divided materials and low to medium temperature calcining applications. The rotary drum is partially enclosed and externally heated by a series of burners mounted in an insulated stationary chamber or jacket.

    Get Price
  • Drum Dryers | KATSURAGI INDUSTORY CO.,LTD.-

    Description. Various heater types available, eciency and robustness characterise directly heated drum dryers by Büttner. They are used for drying wood particles, strands, sugar beet pulp and all free-owing types of wood, biomasses and bulk solids Features Water evaporation capacity of up to 80 t/h depending on the product Direct heating system with multi-fuel burners in combustion …

    Get Price
  • Rotary Dryer RVD - Steam Tube Dryer and Freeze Dryer

    The four gro ups are categor ized as foll ows: Group I: Nonp orous or capil lary-porou s solids with large por e sizes. Only free mois ture is re-

    Get Price
  • Directly Heated Drum Dryer, SIEMPELKAMP

    The rotary drum dryer is suitable for drying woody biomass, agricultural products, and municipal solid waste (MSW). For the production of alternative fuels as well as in the area of waste-to-energy, ANDRITZ Vandenbroek rotary drum dryers are applied to decrease the moisture of the material to the desired level fo downstream process steps.

    Get Price
  • Rotary Dryer - Industrial Rotary Dryers Manufacturer from

    What are different types of Industrial Heating equipment Dryers, Furnaces and Ovens? There are four main types of industrial heating equipment furnaces: natural gas, oil, electric, and propane.Electric furnaces can heat the air by exposing heated elements, while other types of furnaces typically require a heat exchanger or chamber that warms the surrounding air.

    Get Price
  • Zdzisław Pakowski and Arun S. Mujumdar

    Welcome to the premier industrial source for Rotary Dryers in Wisconsin. These companies offer a comprehensive range of Rotary Dryers, as well as a variety of related products and services. ThomasNet.com provides numerous search tools, including location, certification and keyword filters, to help you refine your results. Click on company profile for additional company and …

    Get Price
  • Rotary Dryers Coolers and Calciners

    2021-6-25 · Indirectly Heated Units Indirectly Heated Rotary Dryers and Calcinersare available for dusty, finely divided materials and low to medium temperature calcining applications. The rotary drum is partially enclosed and externally heated by a series of burners mounted in an insulated stationary chamber or jacket.

    Get Price
  • Session-3 Different types of dryers - Courseware

    2021-1-11 · Vacuum shelf indirect dryers •Vacuum-shelf dryers are indirectly heated batch dryers similar to tray dryers. Such a dryer consists of a cabinet made of cast iron or steel plates fitted with tightly fitted doors so that it can operated under vacuum. •Hollow shelves of steel are fastened permanently inside the chamber and are connected in

    Get Price
  • Rotary Drum Dryer manufacturers and suppliers | Exceed

    Rotary drum dryer adopts slightly tilted drum which can be rotated. The wet materials are sent to hopper of rotary dryer by belt conveyor or bucket elevator from the higher side, and well-dried materials are collected from the other lower side, and hot air enters the drum from the feeding side or discharging side according to user needs.

    Get Price
  • China Heated Type Dryer, China Heated Type Dryer ...

    A wide variety of heated type dryer options are available to you, such as electric, battery, and manual. You can also choose from australia, united states, and egypt. As well as from ionic, foldable. And whether heated type dryer is 1 year, 2 years, or 3 years. There are 4,929 heated type dryer suppliers, mainly located in Asia.

    Get Price
  • Indirect Cooling Drums >> Allgaier Process Technology ...

    Dryer is used for evaporation of liquids from solids. Most types of dryers are indirectly heated with either an internal exchanger’s coil or an external heat transfer jacket. This allows the use of remote heating and cooling utilities such as water or oil to precisely control temperatures inside the dryer.

    Get Price
  • Direct vs. indirect heating technology - Solex

    Description. Various heater types available, eciency and robustness characterise directly heated drum dryers by Büttner. They are used for drying wood particles, strands, sugar beet pulp and all free-owing types of wood, biomasses and bulk solids Features Water evaporation capacity of up to 80 t/h depending on the product Direct heating system with multi-fuel burners in combustion …

    Get Price
  • Sifter International - Food Processing Plants Manufacturer ...

    2016-2-15 · direct-heated dryers such as rotary-drum dryers and flash dryers, drying technology has evolved into indirect-heated steam dryers. Direct-heated dryers employ hot gas from combustion or other processes to heat up and dry the material by direct contact. The combustion gas is usually produced in a separate chamber by burning fossil fuels.

    Get Price
  • Rotary dryer - All industrial manufacturers - Videos

    CONTINUOUS DRYING The DLT range of drum dryers is best suited to drying large quantities of bulk material or flat mass-produced parts, ... INDIRECTLY HEATED ROTARY TUBE BUNDLE DRYERS Drying systems for bulk solids ... The rotary dryers are suitable for spot-free drying of all types of workpieces. The use of the hot air blower ensures uniform ...

    Get Price
  • Directly Heated Drum Dryer, SIEMPELKAMP

    Description. Various heater types available, eciency and robustness characterise directly heated drum dryers by Büttner. They are used for drying wood particles, strands, sugar beet pulp and all free-owing types of wood, biomasses and bulk solids Features Water evaporation capacity of up to 80 t/h depending on the product Direct heating system with multi-fuel burners in combustion …

    Get Price
  • BEST PRACTICE MANUAL - DRYERS

    2012-12-5 · Rotary dryers potentially represent the oldest continuous and undoubtedly the most common high volume dryer used in industry, and it has evolved more adaptations of the technology than any other dryer classification. All rotary dryers have the feed materials passing through a rotating cylinder termed a drum. It is

    Get Price
  • Direct vs. indirect heating technology - Solex

    2021-2-27 · The two main types of the dryers are indirect solar dryers and direct solar dryers. In the direct ... air gets heated inside the tube and then it flows to the cabinet where the product is to be dried. ... indirectly contributed to make this project a success. 6. REFERENCES:-

    Get Price
  • “DESIGN AND FABRICATION OF SOLAR DRYER

    2010-10-18 · Pneumatic dryers are typical for lime kiln and boiler firing. Pneumatic dryers offer a high final dryness, exceeding 96%, and a high degree of milling for small particles and clear cut-off. These dryers are generally heated by waste gas flows. Rotary drum dryers are the technology of choice for high-value heat sources.

    Get Price
  • Drying Technology - Canadian Biomass Magazine

    2011-7-27 · tube systems: A single detection diode B double detection diode ... 3.6 to 4.4V Indirectly Heated B 2V Directly Heated C Directly Heated other then 2 or 4V ... Serial Numbers are allocated in chronological order as new valve types are introduced TESLA NUMBERING SYSTEM. leading digits: heater indication : Approximate (usually full volts) heater ...

    Get Price
  • China Heated Clothes Dryer, China Heated Clothes Dryer ...

    Alibaba.com offers 4,453 heated clothes dryer products. About 44% of these are clothes dryers, 2% are hangers & racks. A wide variety of heated clothes dryer options are available to you, such as electric. You can also choose from 1 year. As well as from built-in, freestanding. And whether heated clothes dryer is electric clothes airer, or ...

    Get Price
  • Classification of Convective Drum Dryers (Survey of ...

    2020-11-24 · Drum dryers are the among the most efficient and productive types of dryer equipment intended for processing bulk materials in the chemical and food enterprises as well as in enterprises that work with construction materials [1,2,3].Drum dryers are characterized by simplicity of design, universality, high rate of mixing of material being dried, and reliability of …

    Get Price
  • Rotary dryer - All industrial manufacturers - Videos

    CONTINUOUS DRYING The DLT range of drum dryers is best suited to drying large quantities of bulk material or flat mass-produced parts, ... INDIRECTLY HEATED ROTARY TUBE BUNDLE DRYERS Drying systems for bulk solids ... The rotary dryers are suitable for spot-free drying of all types of workpieces. The use of the hot air blower ensures uniform ...

    Get Price
  • Drying Systems | EPIC Modular Process Systems

    In drum drying, the heated surface is the envelope of a rotating horizontal metal cylinder. The cylinder is heated by steam hot air inside, at a desired pressure raising the temperature of the cylinder wall. The wet material is applied on the drum surface as a relatively thin layer by a variety of different methods.

    Get Price
  • Steam Tube Dryers - Louisville Dryer Company - Steam

    2017-4-20 · dryers, the material is dried in the inner tube of the drum. The dry and warm mate-rial then flows from the inner tube into the outer shell, where it is moved in the op-posite direction by suitably designed vanes and blades and is cooled by the incom-ing, cold ambient air. With the System Mozer-TK, the dried goods can be cooled to

    Get Price
  • Dryers - Ankitatechnologies.com

    In the food processing industry and dairy industry, the majority of dryers employ forced convection with continuous operation. With the exception of the indirectly heated rotary dryer and the film drum dryer, units in which heat is transferred by conduction are suitable only for batch use.

    Get Price
  • Industrial Air Heaters — Process Combustion Corporation

    We can supply directly fired dryers where heat energy is applied directly or indirectly heated dryers, with an external heat source, as in the case of a steam-tube dryer, mixers, calciners and incinerators. The dimensions of the dryer/drum and the throughput varies depending on the materials and the process suitable for the application.

    Get Price
  • Industrial Rotary Equipment - Parts for Kilns and Vessels

    1600 Steam Tube Dryer. The ANCO model 1600 Steam Tube Dryer is designed specifically to dry poultry feathers, hog hair, and blood. When combined with a traditional ANCO Batch Cooker or Continuous Hydrolyzer, you can save production time, steam demand, and electrical consumption. The 1600 Steam Tube Dryer is well-suited for all types of free ...

    Get Price
  • The most reliable and economic dryers in the industry

    In the food processing industry and dairy industry, the majority of dryers employ forced convection with continuous operation. With the exception of the indirectly heated rotary dryer and the film drum dryer, units in which heat is transferred by conduction are suitable only for batch use.

    Get Price
  • DE-9: Lesson 9. INTRODUCTION TO PRINCIPLE OF DRYING

    Batch or continuous, evaporative crystallisers, crystal classification, thermo and mechanical vapour re-compression. All types of industrial dryers, Flash, Fluid Bed, Rotary and Spray Dryers. Steam-heated Drum dryers for heat sensitive materials. Drum Flakers for solidification, cooling and granulation of molten products.

    Get Price
  • Rotary Dryer Design & Working Principle - 911 Metallurgist

    Belt dryers and vacuum band dryers. The belt dryer and the vacuum band dryer is an installation which is used for drying purposes for foods and non-foods. Most of the time the belt dryer dries continuously with a hot or cool air flow. Belt dryers are mainly designed to provide products with a gentle thermal treatment.

    Get Price
  • Products - euchem.co.za

    2007-6-29 · Drum drying is one of the most energy-efficient drying methods and is particularly effective for drying high-viscosity liquid or pureed foods. Energy efficiencies in drum drying could range from 70 to 90%, corresponding to steam consump-tion of 1.2–1.5kg per kg of water evaporated.[19,22] Drum dryers may be dip or splash fed or equipped with ...

    Get Price
  • Rotary Dryer: Operating principle, Classifications, Uses ...

    2008-3-18 · Selecting the Right Biosolids Dryer: Part I and Part II. Part I of this article appeared in the February 2008 issue. Part II appeared in the March 2008 issue. Both appear here together. This article reviews the basic process to help select an appropriate drying technology. Factors such as dryer operation, type of sludge, operation schedule, air ...

    Get Price
  • Biosolids/Sludge Dryer | Komline-Sanderson

    2012-9-8 · indirect heat rotary dryer. Posted at: September 8, 2012 [ 4.9 - 2033 Ratings] As a leading global manufacturer of crushing and milling equipment, we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant. We also supply individual crushers and mills as well as ...

    Get Price
  • indirect heat rotary dryer | Solution for ore mining

    Belt dryers and vacuum band dryers. The belt dryer and the vacuum band dryer is an installation which is used for drying purposes for foods and non-foods. Most of the time the belt dryer dries continuously with a hot or cool air flow. Belt dryers are mainly designed to provide products with a gentle thermal treatment.

    Get Price
  • Belt dryers and vacuum band dryers - Wire Mesh

    2007-6-29 · Drum drying is one of the most energy-efficient drying methods and is particularly effective for drying high-viscosity liquid or pureed foods. Energy efficiencies in drum drying could range from 70 to 90%, corresponding to steam consump-tion of 1.2–1.5kg per kg of water evaporated.[19,22] Drum dryers may be dip or splash fed or equipped with ...

    Get Price
  • Refractance Window Dehydration Technology: A Novel

    2008-3-18 · Selecting the Right Biosolids Dryer: Part I and Part II. Part I of this article appeared in the February 2008 issue. Part II appeared in the March 2008 issue. Both appear here together. This article reviews the basic process to help select an appropriate drying technology. Factors such as dryer operation, type of sludge, operation schedule, air ...

    Get Price
  • Selecting the Right Biosolids Dryer: Part I and Part II | WWD

    2015-5-21 · Rotating Dryers Requiring Syphon Drainage. ... Now refer to Chart 3-2 below, titled “How Various Types of Steam Traps Meet Specific Operating Requirements” and read down the extreme left-hand column to each of the letters B, C, E, K, N. The letter “B,” for example,

    Get Price
  • How to Trap: Rotating Dryers Requiring Syphon Drainage

    For handling large volumes of solutions, spray dryers are unsurpassed, and it is only at feed rates below 0.1 kg/s, that a drum dryer becomes more economic. Indeed the economy of spray drying improves with capacity until, at evaporative capacities of greater than 0.6 kg/s, the unit running cost is largely independent of scale.

    Get Price
  • Spray Dryer - an overview | ScienceDirect Topics

    The seed is placed on a tray and moved on a conveyor belt to a drying room, usually heated by an airflow. The heat from the heating source is transferred from the air surrounding the seeds to the seeds, causing them to dry. Manual seed dryers are usually cheap and effective, but they are generally used for smaller batches of tiny seeds.

    Get Price
  • Different Types of Seed Drying Techniques ...

    2020-11-29 · Type U52 is directly heated and will therefore provide its full output within a second or so from switch-on from cold, ie. before other (indirectly heated) valves in the set are ready to conduct. The likely result is a damaging HT surge for at …

    Get Price
  • 5Z4G @ The Valve Museum

    Measurement, the process of associating numbers with physical quantities and phenomena. Measurement is fundamental to the sciences; to engineering, construction, and other technical fields; and to almost all everyday activities. For that reason the elements, conditions, limitations, and theoretical foundations of measurement have been much studied.

    Get Price
  • Biosolids/Sludge Dryer | Komline-Sanderson

    Directly or Indirectly Fired Provides Efficient Heat Source. The function of the gas-fired burner is to be the source of heat energy into the AST Dryer. The burner heats the process air to an elevated temperature (400°-1200° F) and is responsible for controlling the energy balance of the system.

    Get Price
  • AST Dryer - Scott Equipment Company

    2021-1-2 · Various types of airflow patterns are possible with nozzle atomization systems. Nozzle type spray dryers are used to produce material in the granular, non-dusty or powder form as required. Depending on the desired physical properties of end product, the choice of co-current, counter current or mixed air flow is selected.

    Get Price
  • Rotary dryer-Rotary kiln,rotary dryer_Hongke Heavy ...

    Rotary Drum Drying Machine. Rotary drum dryer is one of the traditional drying equipment, and it has reliable running, flexible operation, strong adaptability, and high production capacity. It is widely used in metallurgy, building materials, chemical industry, coal washing, fertilizer, ore, sand, clay, kaolin and sugar.

    Get Price
  • Dryers | MOJJ - Mojj Pune

    2021-5-26 · Typically, the steam is passed through tubes (as in a steam tube dryer) or through a jacket or wall passage (as in pan or rotary drum dryers). Thermal Oil Fluid Thermal oil or fluid is heated and used to indirectly transfer heat to a material through a process wall, jackets, discs or …

    Get Price
  • Rotary Drum Drying Machine - tdfertilizermachine.com

    1999-1-12 · Biomass drying technologies. Final report, September 1997--May 1998. Technical Report Salomaa, E. The report examines the technologies used for drying of biomass and the energy requirements of biomass dryers. Biomass drying processes, drying methods, and the conventional types of dryers are surveyed generally.

    Get Price
  • Overview of equipment for freeze dryers - LaboGene

    The task for the dryer section is to remove water from the paper web by evaporation. Typical methods for paper or board drying are multi-cylinder drying or air drying. Regardless of the selected drying method, it is vital to ensure maximum drying efficiency with minimum energy consumption. Valmet’s dryer sections feature optimized steam ...

    Get Price
  • Industrial Parts Dryers Specifications | Engineering360

    2014-12-11 · That is the 5R4 will drop about 65v. Be aware that there are several types of 5U4's. The one I am most familiar with is the 5U4GB which draws 3 Amps on the heater. Drops about 50v. The 5AR4 has 2 amps heater current. Also the 5U4GB has a directly heated cathode where as the 5AR4 is indirectly heated.

    Get Price