Vitai's full-chain technology has empowered a large aluminum and power group to comprehensively transform, setting a new benchmark for "temperature and pressure reduction" in the industry

In power stations and industrial heating systems, desuperheating and pressure reducing devices are key equipment for ensuring stable steam parameters and meeting multi-level energy demands. Their performance directly affects the safety and economy of unit operation.

Recently, Viti Fluid Control Co., Ltd. successfully signed a contract for a comprehensive unit renovation project of a large aluminum and power enterprise with its mature technical solutions and rich engineering experience. It will supply multiple sets of desuperheating and pressure reducing devices for steam parameter regulation.

Project Overview: Multiple working conditions and high parameters, testing true skills

This project involves two completely different steam parameter requirements:

Specification One

The maximum pressure of the primary steam is 5.24MPa, and the temperature reaches 540℃

Secondary steam demand: Pressure 2.3-2.8MPa, temperature 250℃

The flow rate of a single set reaches 230t/h

The material of the steam pipe is A335P22

Specification Two

The maximum pressure of the primary steam is 8.75MPa and the temperature can reach up to 620℃

The demand for secondary steam is also 250℃ and 2.3 to 2.8MPa

The flow rate of a single set is 80t/h

The material of the steam pipe is P92

The two parameters have a large range and a high temperature and pressure level, which puts forward extremely strict requirements for the high-temperature resistance performance, pressure reduction stability, regulation accuracy and long-term operation reliability of the desuperheating and pressure reducing device.

Viti Solution: Utilizing German technology to address extreme temperature differences

The desuperheating and pressure reducing device provided by Viti for this project adopts a horizontal horizontal entry and exit structure, with built-in fixed and sliding brackets, suitable for indoor layout. The overall design strictly adheres to the following core standards:

GB/T 10868 "Temperature and Pressure Reducing Valves for Power Stations"

NB/T 47033 "Temperature and Pressure Reducing Device"

GB/T 10869 "Power Station Regulating Valves"

NB/T 47044 "General Requirements for Power Station Valves"

In the key technical links, Viti demonstrated the strength of a professional manufacturer:

    A material system resistant to high temperature and high pressure

For the material of high-temperature steam pipes, Viti selects heat-resistant alloy steel of the same or higher grade for key components such as pressure reducing valves and mixing pipes to ensure long-term stable operation under high-temperature conditions ranging from 540 to 620℃.

    2. Precise voltage stabilization and low-noise design

The device requires an annual continuous operation time of no less than 7,200 hours, with sensitive automatic regulation and stable secondary steam parameters. Viti's pressure reducing valve adopts a low-noise, multi-stage pressure reducing structure design, effectively controlling the flow rate and vibration under high pressure difference. The noise level within 1 meter of the equipment casing is strictly controlled within 80dB(A), meeting the on-site environmental requirements.

    3. Wide load regulation capacity

The secondary steam load covers a range from the minimum to the maximum. Viti's desuperheating and pressure reducing device has a large regulation ratio capacity, ensuring that the outlet steam parameters remain stable and meet the standards even under fluctuating flow and pressure conditions.

    4. Highly reliable matching valve assembly 

The complete set of equipment is equipped with electric isolation valves, desuperheating water regulating valves, filters, throttle valves, check valves, etc. Among them, the electric control valve and the shut-off door are selected from imported first-line brands. The dehydrating water control valve pays special attention to wear resistance and regulating performance, adapting to the pressure fluctuations of dehydrating water and possible impurities.

  5. Strict inspection and safety protection 

Each device is equipped with a main safety valve and an impulse safety valve in accordance with the specifications to quickly relieve pressure when the system malfunctions. Before leaving the factory, the entire unit undergoes a hydrostatic test at 1.5 times the design pressure. All welds undergo 100% non-destructive testing, and each alloy steel component is subjected to spectral analysis to ensure the accuracy of the materials.

Intelligent control and full-process service

To be compatible with the DCS system of power plants, Viti is equipped with an intelligent integrated electric actuator, which has the following features:

• LCD Chinese display screen, non-intrusive, no need to open the cover for debugging;

• Absolute value encoder and frequency conversion control, with high regulation accuracy;

• The shell is made of specially formulated aluminum alloy, featuring full anti-corrosion and lightweight protection with an IP67 rating, making it suitable for the harsh industrial environment.

• When power or signal is lost, it should remain in its original position or the preset safe position.

In addition, Viti also offers full life-cycle services ranging from installation guidance, commissioning to long-term operation and maintenance. Any damage caused by quality issues during the warranty period will be repaired or replaced free of charge. After the warranty period, spare parts will be supplied on a long-term basis. After-sales service promises to arrive at the site within 24 hours. Personnel will not leave until the problem is solved.

Performance as proof, strength as witness

This project is not the first time that Viti has made efforts in the field of high-temperature and high-pressure desuperheating and pressure reduction. Before this, the Viti desuperheating and pressure reducing device has been stably operating in many domestic power, petrochemical and heating projects, withstanding the tests of high parameters, long cycles and complex loads.

Viti of Russia - integrating the soul of German precision engineering, forging fluid control equipment, absorbing the essence of German technology, relying on a century-old industrial heritage, steadily expanding its territory in the Asia-Pacific region, adhering to quality and service, and laying a solid foundation for its operation and development in the Chinese market.

Conclusion

Every detail of the technical specification is a rigorous test of manufacturing capabilities. The temperature and pressure reducing devices provided by Viti for large-scale aluminum and power enterprises this time are not only the delivery of equipment, but also another in-depth practice of high-temperature and high-pressure fluid control technology.

    Rooted in German precision engineering and oriented towards customer needs, Viti continuously provides safer, more stable and more efficient fluid control solutions for industries such as power, chemical engineering and metallurgy.