COVNA Industrial Automation Co., Ltd is proud to announce its participation in the upcoming ROS-GAS-EXPO 2025, one of Russia’s premier exhibitions for the gas and industrial automation sectors. From October 7 to 10, we’ll be exhibiting at Booth Q4.7 in St. Petersburg, presenting our latest innovations in valve technology and automation solutions.

Event Overview

What to Expect at Our Booth

COVNA will be showcasing a wide range of industrial automation products tailored for gas, petrochemical, water treatment, and environmental applications:

• Electric Ball Valves & Butterfly Valves – Precision control for demanding environments
• High-Speed Solenoid Valves – Reliable performance for automated systems
• Smart Actuators – Enhancing efficiency and control in industrial processes
• Custom Valve Solutions – Engineered to meet diverse global requirements

Our technical team will be on-site to provide live demonstrations, product consultations, and tailored solutions for your business needs.

Why Visit COVNA?

With a global footprint across 60+ countries, COVNA is a trusted name in industrial automation. Our commitment to quality, innovation, and customer-centric engineering has made us a preferred partner in sectors such as gas, oil, chemical, water, and energy.

ROS-GAS-EXPO 2025 is not just a showcase—it’s a gateway to deeper collaboration, market expansion, and technical exchange. Whether you're a distributor, engineer, or procurement manager, we welcome you to explore new possibilities with COVNA.

Corrosive elements, high temperatures, high pressures, frequent starts and stops, and valve leaks are common characteristics of chemical plants. Whenever a valve leaks, production stops, contamination occurs, and the workplace becomes more hazardous. COVNA recognizes this and designs corrosion-resistant ball valves to withstand the harshest chemical working conditions. Their precision alloy material offers high-temperature resistance and precise sealing, ensuring reliable and leak-free valves.

In chemical plants, the interaction of various media can cause even minor seal defects to trigger catastrophic leaks.

Damaged valve stems and seats are common causes of leaks due to corrosive media in pipelines.

"Aging, high internal diameter accuracy, short maintenance intervals, and high downtime maintenance costs" all describe the core characteristics of traditional valve seals.

COVNA corrosion-resistant ball valves offer key technological advantages that set them apart from the competition.

This exceptionally corrosion-resistant, duplex alloy, known as COVNA alloy, offers industry-leading resistance to strong oxidants and hydrogen sulfide.

The all-metal hard seal design makes the valve seat unique. With no rubber sealing components, the risk of seal failure is virtually eliminated, and the valve seat is temperature-resistant up to 450°C.

This achievement is achieved through full CNC control. Dynamic tracking pressure testing guarantees a surface roughness of Ra ≤ 0.4μm. DocuTrack is a software that ensures zero leakage and is particularly suitable for surface plating.

Modular Maintenance Structure

The quick-connect, removable valve stem assembly ensures optimal operation of the piping system, allowing the stem assembly to be replaced while the piping system is operating without shutting down or disassembling the system.

Installation and Maintenance Key Points

Pre-installation Inspection

Inspect the flange surface for scratches. Open the valve fully to remove any foreign matter from the internal cavity.

Regular Lubrication

Inspect the valve packing and stuffing box every three months and apply high-temperature grease as appropriate for system conditions.

Remote Monitoring

A pressure relay monitors the pressure differential across the valve in real time to check the sealing condition.

Remote Maintenance

The valve can be remotely maintained and monitored in real time using the pressure sensor provided with the valve.

COVNA's corrosion-resistant ball valves are the solution to chemical plant leak challenges. These valves utilize the latest alloys and all-metal seal construction. COVNA provides an added layer of safety for your installation, significantly reducing maintenance costs and environmental risks.

Contact COVNA today for detailed product white papers and field-tested solutions to seal leaks in your chemical plant.

COVNA is proud to announce the successful conclusion of ECWATECH 2025 in Moscow. The exhibition marked a key milestone for our company and perfectly aligned with our goal of deepening relationships in the Russian market.

During the exhibition, our booth attracted a large number of visitors, showcasing our latest valve technologies. Exhibits included cutting-edge ball valves and durable seated butterfly valves, all designed for water treatment and industrial fluid control. Experts expressed their appreciation, highlighting our continued focus on high quality and intelligent innovation.

We are very pleased with the results of ECWATECH 2025. The exhibition provided a top-notch platform for our technology presentation and opened up vast opportunities for future partnerships. The fruitful discussions laid a solid foundation for future collaborations, and we are excited about the newly established business relationships. COVNA intends to continue this dynamic and expand our presence in Russia.

When selecting an industrial valve, a correct process not only ensures stable system operation but also significantly reduces maintenance costs. This article will provide an in-depth analysis of key factors at each step, including valve type, project specifications, materials, and supplier comparisons, to help you quickly identify the most suitable industrial valve solution.

一. Understanding Common Valve Types

Before purchasing, first understand the basic characteristics and applicable scenarios of each valve type:

- Ball Valve: Excellent sealing, suitable for quick shutoff and frequent opening and closing applications.

- Gate Valve: Low opening resistance, suitable for fully open or fully closed applications.

- Butterfly Valve: Lightweight and compact, suitable for large-diameter, low-pressure systems.

- Check Valve: Automatically prevents backflow, commonly used at pump outlets and in pipe networks for backflow protection.

二. The Impact of Project Parameters on Model Selection

1. Pressure Rating Select the appropriate nominal pressure (PN) or ANSI rating based on the maximum working pressure of the process pipeline.

2. Temperature Range For high-temperature applications, heat-resistant materials (such as alloy steel and silicon carbide) are preferred; for low-temperature applications, pay attention to the brittle temperature.

3. Media Characteristics For corrosive media, choose a corrosion-resistant alloy or lined valve. For media containing solid particles, use a wear-resistant valve seat.

三.Key Points for Material and Seal Selection

- Valve Body Material Carbon steel, 304/316 stainless steel, alloy steel, etc., determined based on the media and temperature requirements;

- Seal Material PTFE is suitable for most corrosive fluids; metal seals are suitable for high temperatures and high pressures;

- Surface Treatment Spraying, galvanizing, or PTFE lining to enhance corrosion resistance and leak prevention;

四.Supplier and Service Comparison

- Product Certifications ISO 9001, API, CE, UL, and other certifications;

- Delivery and Inventory Standard parts are generally delivered in 2–4 weeks; custom parts require coordination with the supplier;

- After-Sales Support Warranty period, on-site installation guidance, and spare parts availability;