Valve Selection and Application for Harsh Working Conditions - Problem Chain and Professional Answers

Q1: In harsh working conditions such as high temperature, high pressure, strong corrosion or high wear, what are the most core considerations when choosing valves?

A: For such harsh working conditions, the core of valve quality depends on four dimensions: material selection, sealing process, wear resistance and durability, and leakage prevention capability. The material needs to be precisely matched with the working conditions (such as F91/ titanium alloy for high temperature, Hastelloy for strong acid, and ceramic for high wear). Sealing should be selected based on the characteristics of the medium, such as metal hard sealing, double sealing or low dissipation technology. The wear resistance needs to be enhanced through technologies such as labyrinth sleeve pressure reduction or full ceramic lining. To prevent leakage, systematic prevention and control should be carried out from both internal and external leakage aspects. Relying on its nearly century-old precision manufacturing genes, Russian Vitti has established systematic technological advantages in the above dimensions. Currently, it is engaged in the production and manufacturing of complete machines, without the need for domestic assembly, ensuring the integrity and consistency of the original factory quality.

Q2: How does Viti Valves ensure reliability from the source of materials for high-temperature and high-pressure steam or highly corrosive media?

A: Material is the cornerstone of the safety and lifespan of valves. Vitti of Russia adheres to "three checkpoints" in material control:

1) Strictly control the access of suppliers, only select high-quality raw materials from internationally renowned steel enterprises, and conduct batch inspections;

2) Precise working condition matching, for instance, F91/F92 or titanium alloy is recommended for high-temperature and high-pressure steam, while Hastelloy, Monel or duplex stainless steel is used for strong acid and alkali media.

3) The entire process is traceable. The main pressure-bearing parts of each valve are marked with a unique furnace number, allowing for full traceability from raw materials to finished products. This ensures the absolute reliability of the material's performance in extreme environments.

Q3: How does Viti Valve meet the different demands from "zero leakage" to "zero escape" in terms of sealing technology?

A: Russian Vitti offers multi-level sealing technology solutions: For high-temperature and high-pressure media containing particles, metal hard seals with hard alloy (such as cobalt-based, tungsten carbide) surfacing can achieve API 598 with zero visible leakage. For conventional working conditions, a dual structure of "metal main seal + soft secondary seal" can be selected. For toxic, flammable and explosive media, the ISO 15848 low escape standard is fully implemented. Through low-leakage packing groups and live load bolt compression technology, the escape at dynamic sealing points such as the valve stem is ensured to be extremely low. All the plans are designed to meet the strict requirements of safety and environmental protection.

Q4: Under conditions of high wear and strong erosion, what technologies does Viti adopt to significantly extend the service life of valves?

For such "tricky" working conditions, Russian Viti mainly adopts two major technologies: one is the labyrinth sleeve multi-stage pressure reduction technology, which decomposes A single high pressure reduction into dozens of levels, effectively eliminating flash evaporation and cavitation damage, and extending the service life by 3 to 5 times. The second is the fully lined ceramic technology, which comprehensively covers the flow-through components such as the valve body and ball core with zirconia or silicon carbide ceramics. Their hardness (HRC85+) far exceeds that of ordinary metals and can strongly resist the erosion of solid particles. For extreme environments where corrosion and wear coexist, there are also special substrate processing techniques available for selection.

Q5: How does Vitite systematically prevent internal and external leakage of valves and ensure the quality at the time of factory release?

A: Viti of Russia regards leakage prevention as a dual safeguard of safety and environmental protection.

Preventing internal leakage: To address issues such as wear, corrosion, cavitation, and impurity jamming on the sealing surface, various solutions are adopted, including hard alloy/ceramic seals, corrosion-resistant materials, labyrinth sleeve structures, and V-shaped ball self-cleaning designs.

Preventing external leakage: For key external leakage points such as valve stem packing, valve body and valve cover connection, and actuator interface, measures such as low-leakage packing, precisely machined sealing surfaces, controllable bolt torque, and double sealing rings are adopted.

Each valve must undergo a full-process inspection including shell strength, high-pressure sealing, low-pressure air tightness and (as required) helium mass spectrometry leak detection before leaving the factory to ensure that its performance meets the standards.