Email: [email protected]
Add: #407 Rongxing Rd, Shanghai, China
Wechat: +86 199 2125 0077
WhatsApp: +86 185 1656 9221
thintank control valve manufacturer

Share optimized solutions, professional valve knowledge and industry news

Please enter the relevant terms or keywords you need to consult, and relevant articles will appear in the search results. If you can’t find the answer you need, please feel free to contact us and we will be happy to help. Or you can directly send an email to [email protected]

What is the difference between the three-way control valve used for thermal oil/hot oil and the common three-way valve?

For thermal oil condition request three-way control valve should bear high temperature, around 350 degree centigrade, so it makes more difference design with other 3-way globe valves.
Table of Contents
    Add a header to begin generating the table of contents

    For thermal oil conditions required three-way control valve should bear a high temperature, around 350-degree centigrade, so it makes a more different design than other 3-way globe valves.

    motorized three way control valves drawing
    motorized three-way control valves drawing

    Three-Way Control Valves for Thermal/Heat Oil

    High Temperature 3 Way Control Valves 2
    High Temperature 3 Way Control Valves

    Three-way control valves are designed with three flow ports, AB, A and B port. This type of control valve modulates flow capacity and can be diverting flow to two outlet ports or mixing two inlets to one outlet port with different temperatures or pressures.

    thermal oil two way control valves
    thermal oil two-way control valves
    thermal oil 3 way control valves
    thermal oil 3-way control valves

    Difference Design of Three-Way Control Valve for Hot Oil

    1. Bonnet design. THINKTANK uses stainless steel bellows bonnet and flexible graphite packing as double sealing to protect the actuator performance and effectively isolate the medium in the pipeline from the outside, significantly improving the safety and reliability of the product seal.
      This 3-way control valve was specially developed for the oil furnace temperature control system of the heat setting machine in the textile machinery industry.
    2. It usually assembles a pneumatic or electric actuator with a 4~20mA input signal or on/off control signal to change the valve opening. At the same time, the isolation signal of the valve opening will provide feedback to the control system.
    3. The thermal oil 3-way control valves generally flow to open, so their stability is better than others.
    4. The servo amplifier adopts deep dynamic negative feedback to improve adjustment accuracy.
    5. The electric/pneumatic three-way control valve used for heat-conducting oil saves automation. Compared with single-seat, double-seat, or sleeve/cage type globe control valves, the same system can save one unit valve, simplify the design and save cost for the end-users.
    6. There are many electric operators, which can be applied to 4~20mA or 0~10mA DC or 1 ~5V DC, 0 ~10V DC, with power supply 380V AC, 220V AC, 24 V DC, or just simply air supply 2 ~ 6 bars.
    7. If using an electronic actuator to control the valve opening by the current signal, no need servo amplifier.
    8. The bellows seal type bonnet will completely seal the moving stem, preventing any fluid leakage.
    9. The hot-oil 3-way control valve is not only guided by the bushing at the valve bonnet but also guided by the side of the valve plug and the inner surface of the valve seat, with a sizeable guiding area and reliable operation.
    3 Way Control Valve Used For Hot Oil
    3 Way Control Valve Used For Hot Oil

    Case Study of Heat Oil Application(Motorized 3-Way Control Valve)

    This liquid solution is for an Indian customer on a heat oil project. There is no control equipment such as a controller on-site, so we provide the integral solution according to the customer’s parameters.

    motorized three way control valves
    motorized three-way control valves

    Process Parameters

    • Flow volume approx.: 120 m³/h
    • Pressure head, approx.: 45 m l. c.
    • Medium: Therminol 66
    • Operation temperature: 280 °C
    • Max. acceptable operating temperature: 335 °C
    • Control valve with the actuator in 3-way execution with flanges and bellow sealing
    • Nominal size: DN150
    • Nominal pressure: PN16
    • Valve function: Distribution function
    • Actuator: Electric actuator prefer (ARI)

    Solution & Valve Principle

    The thermal oil enters the equipment through the three-way control valve, and the temperature sensor collects the process variables on the equipment and delivers parameters to the controller. After comparing the process variable with the setpoint, the controller sends a corrective signal to the three-way control valve, in case modulating the valve opening to reach the required value.

    When the thermal oil temperature in the equipment is lower than the setpoint, the controller sends an analog signal to increase the opening in the left → right horizontal channel of the 3-way control valve.

    Conversely, when the temperature of the thermal oil is higher than the setpoint, the controller sends a signal to let the three-way control valve left → right channel opening decrease, while the left to the bottom channel opening increases, allowing the medium (thermal oil) to circulate back to the flow.

    thermal oil three way control valve
    thermal oil three-way control valve

    Thermal/Heat Oil Three-Way Control Valve Drawing

    dn125 motorized three way control valves drawing
    dn125 motorized three-way control valves drawing

    Principle and Composition of Thermal Oil Temperature Control Device

    The thermal oil temperature control device comprises a circulating oil pump, electric heater, cooler, cooling valve, temperature sensor, oil tank, valve set, and controller panel. The temperature control device is especially suitable for high-temperature cooling needs (below freezing temperature) and is based on heating as the primary purpose, and the device is often cooling as a supplement.
    The temperature control unit of the control panel (PLC or temperature control meter) is used to detect the return oil temperature through the temperature sensor, control (PID) the electric heater and cooling valve, and then control the heating and cooling process: after the oil is heated by the heater, the heat is transferred to the equipment through the forced circulation of the oil pump, and the oil is discharged in the equipment and heats up the equipment. After exothermic and heating the equipment, the temperature drops and then circulates to the heater for circulating heating; when the temperature exceeds the set temperature, the heater stops, and the cooling valve (or fan) is opened for cooling to keep the device temperature constant at the set working temperature.
    The independently installed oil tank has three functions oil replenishment, exhaust, and expansion to ensure the stable operation of the thermal oil temperature control device.

    Device Features

    • Take thermal oil as a working medium, and realize high-temperature operation under normal pressure. The commonly used temperature range is 0~400℃.
    • Nickel-chromium alloy electric heating tube, PT100 temperature sensor.
    • The heat-conducting oil pump adopts a high-temperature mechanical seal.
    • The control cabinet adopts a SIEMENS touch screen and PLC, FUJI temperature control meter, and Schneider electric apparatus.
    • PID automatic adjustment function of temperature control process can realize temperature control accuracy: ±1℃, working temperature can be set at any time.
    • The control panel has over-temperature, oil shortage, dry burn, overload protection, and automatic exhaust function.
    • Temperature control device entire skid-mounted factory, each temperature control independently.

    In conclusion

    As a reliable valve manufacturer, THINKTANK provides many valve solutions for our customers, such as expansion cooling tubes, stainless steel bellows bonnet, and balanced/unbalance cage guided trims to satisfy unique conditions. Generally, our stainless steel bellows are suitable for the valve operating temperature range of 662 °F efficiently. So, these control valves can regulate thermal oil or heat oil, hot oil, high-temperature water, steam, and other critical media. If you are interested in more information, please just feel free to contact us by email marketing at

    Picture of Will Don

    Will Don

    After earning my bachelor's degree in mechanical engineering from Zhejiang Normal University in 2008, l was fortunate enough to begin my career with Siemens, Fisher, and YTC, focusing on control valve accessories. Over the past dozen years, l've poured my heart and energy into understanding technology and fluid solutions for control valves.
    Now, as the marketing director for THINKTANK, a trusted branch of the Taiwan STONE valve group, I can't help butf eel proud of how far we've come. Our knowledge isn't just reaching professionals like engineer and valve distributors; it's also inspiring the next generation of automation college students.
    l genuinely hope you're enjoying our articles and finding them helpful.Your thoughts, questions, and feedback mean the world to me, so please don't hesitate to reach out to marketing[at] Whether you're a seasoned expert or just curious about the field, I'm here to connect, share, and learn together.

    All Posts »

    I am the author of this article, and also the CEO and marketing director of THINKTANK, with 15 years of experience in the industrial valve industry. If you have any questions, you can contact me at any time.

    The Latest News
    3inch natural gas regulator a216wcb thinktank

    DN80 Natural Gas Regulator Manufactured in 2018

    Yesterday, we received an inquiry for the repair of a natural gas pressure regulator. Upon checking our records, we found that this valve was manufactured ...
    Read More
    training control valve

    Training Sessions on Control Valves

    Hello Everyone, I’m excited to share some news with you all directly from THINKTANK’s official website! Over the past few months, we’ve received a myriad ...
    Read More
    arctic lng 2 liquefaction trains

    Контрольные клапаны THINKTANK в проекте Arctic LNG-2

    В THINKTANK мы гордимся нашим вкладом в проект Arctic LNG-2, что является подтверждением нашей приверженности поставке высококачественных контрольных клапанов и регуляторов. Наше участие подчеркивает нашу ...
    Read More
    control valves

    THINKTANK Control Valves in Arctic LNG-2 Project

    At THINKTANK, we take immense pride in our contribution to the Arctic LNG-2 project, a testament to our commitment to delivering high-quality control valves and ...
    Read More
    dubai seawater desalination project

    Passion Like a Beam of Light

    Passion, like a beam of light,Illuminates every ordinary soulWho strives with earnest toil,Rendering life brilliantly meaningful,With not a moment spent in vain,Defining the essence of ...
    Read More
    dn25 pn16 wcb pcv (1)

    Pneumatic Single-Seat Globe Control Valves PCV DN25 PN16

    Read More
    heat shutdown on off valve

    Valvula shut off com atuador fusível

    A válvula shut-off com atuador fusível é um dispositivo utilizado para controlar automaticamente o fluxo de fluidos em tubulações, especialmente em situações de emergência ou ...
    Read More
    c95500 nickel aluminum bronze control valve factory thinktank

    Engineering Case Studies of C95500 Nickel Aluminum Bronze Control Valves

    In modern industry, the choice of control valves is critical for ensuring the reliability, efficiency, and safety of processes. As a leading manufacturer of C95500 ...
    Read More
    atex ped certificate

    Congratulations to THINKTANK Achieve ATEX and PED Certificates For Fusible Link Safety Valve and Breather Valve Series

    As the co-founder of THINKTANK, it is with a profound sense of pride and humble excitement that I share a milestone that marks a significant ...
    Read More

    Contact Us

    With expertise in valves and rich experience in the oil&gas, chemical industry, textile mills, power plants, and sugar mills. THINKTANK has become the premier manufacturer of next-generation precision control valves.

    With a customer base that includes over 42 of the world’s leading engineering&contractors and international valve brands, THINKTANK Valves offers cost-effective valves that help our customers achieve automated process control without paying high prices.

    Why are more and more international valve brands choosing THINKTANK for OEM service?

    Brand is reputation, which not only requires high valve technology, but also great comercial support and fast response after-sales service and delivery time. They will not gamble their brand on an unknown product

    Get An Instant Quote

    Joy Preview

    Focused on Control Valves & Self-Operated Pressure Regulators For Over 30 Years

    A Good Partner Is A Lasting And Effective Investment

    Get An Instant Quote

    Direct to Control Valve Factory With Competitive Price & Reliable Quality

    Joy Preview
    Joy Preview

    Get An Instant Quote

    Just leave your name, email, and simple message or requirements, We will contact you within 1 hour.

    WhatsApp: +86 185 1656 9221

    Skype ID: sowell85

    Wechat ID: +86 199 2125 0077