A major South African oil client deployed the DVS sliding blind valve in a multi-media pipeline system requiring frequent switching between oil products, natural gas, and chemical solvents. Since installation, the system has achieved stable zero-leakage operation. The valve’s online operation under pressure has completely eliminated the need for shutdown and depressurization, while significantly improving onsite maintenance safety.   Customer Challenge: Seal Failure and Lack of Positive Isolation During Frequent Multi-Media Switching   The client is a large oil processing and storage company in South Africa. Their pipeline network frequently switches between multiple media, including oil products, natural gas, and chemical solvents. Due to the significant differences in media characteristics, the system places extremely high demands on valve sealing performance, corrosion resistance, and operational safety.   While using conventional gate valves and ball valves, the client faced the following critical operational issues over the long term: Issue Type Conventional Gate / Ball Valve Performance Actual Operational Impact Seal failure and internal leakage Seals degrade over time and cannot guarantee zero leakage Media leakage creates serious safety and environmental risks Shutdown and depressurization required for maintenance Pipelines must be fully depressurized before maintenance Long downtime and significant production losses Inability to achieve true positive isolation Isolation depends on sealing components with limited reliability Risk of cross-contamination during media switching   The client specifically requested a valve solution that could: ● Operate without relying on seals ● Support operation under pressure ● Provide absolute physical isolation    DVS Sliding Blind Valve Solution: Physical Isolation + Online Operation + Zero Leakage   The DVS sliding blind valve uses a solid blind plate to physically block the media passage. This design fundamentally eliminates the risks associated with conventional seal-dependent valves. The following four technical advantages played a key role in solving the client’s operational challenges:   Absolute Physical Isolation with Zero Leakage   The solid blind plate directly blocks media flow, eliminating seal aging and seal failure issues. This ensures true zero-leakage performance under all operating conditions.   Online Operation Under Pressure Without Shutdown   The valve can switch between open and closed positions while the system remains pressurized. No depressurization or production shutdown is required, dramatically reducing downtime and operational safety risks.   External Position Indicator Prevents Misoperation   An external position indicator clearly displays whether the valve is open or closed. Operators can instantly verify valve status, significantly reducing the risk of operational mistakes.   Co...

Recently, DERVOS Valve successfully passed the audit by the American Petroleum Institute (API). The company’s API Spec 6D certification for pipeline valves has been renewed, and the API 600 certification has also been issued. Both certificates are valid through 2029.   What is an API6D certificate?   API 6D is an internationally recognized standard for valves used in oil and gas pipeline transportation systems. It covers the full process requirements for design, manufacturing, and inspection of products such as ball valves, gate valves, and check valves. The certification typically requires renewal audits every three years.     What is an API600 certificate?   API 600 is an internationally recognized standard for steel gate valves used in oil and gas refinery applications. It defines requirements for design, materials, manufacturing, inspection, and testing. This certification is generally subject to renewal every three years to maintain validity.   According to available information, the audit covered multiple aspects, including quality management system operation, production process control, inspection equipment calibration, and personnel qualifications. During the audit, the API inspection team conducted an on-site review of the entire process at DERVOS Valve, from raw material procurement to final product delivery.   A representative from the company’s quality department stated that DERVOS Valve has been continuously improving its standardized system management and has established a quality control system covering the full product lifecycle. Key production processes are supported by standardized work instructions, and inspection records are fully traceable to individual orders.   The successful renewal of these certifications demonstrates that DERVOS Valve continues to meet API requirements in product manufacturing and quality assurance within the industrial valve sector. It also supports the company’s qualification to supply products for international projects such as oil and gas pipelines and LNG receiving terminals.   The company stated that it will continue to focus on standardized production and process management to ensure the effective operation of its quality management system.

This year’s Dervos annual conference was noticeably more grand and well-organized than in previous years.   In the morning session, each department delivered its annual work summary, reviewing key projects and achievements over the past year. Teams also openly shared the challenges encountered during implementation and the practical experience gained along the way.   Through this cross-department exchange, everyone developed a clearer understanding of one another’s responsibilities and workflows, laying a stronger foundation for future collaboration and communication.     In the afternoon session, the Outstanding Employee awards were presented. Each nominee shared their work achievements and practical experience, demonstrating a strong sense of responsibility and execution across different roles. It is precisely this proactive mindset, collaborative spirit, and down-to-earth working approach of Dervos employees that drives the team steadily toward its shared goals.     Showing up on time every single day throughout the year — that’s quite an achievement. Ian has now received the Perfect Attendance Award for two consecutive years.     During the annual conference, Dervos also presented medals and exclusive commemorative gifts to employees who have completed five years of service.     Dervos values the long-term dedication and consistent commitment of its team members, and sincerely appreciates the trust and contributions they have made over the years. For many at Dervos, the company is not only a platform for professional growth, but also a stage where shared goals and collective efforts come to life. In the evening, the annual conference transitioned into the banquet segment. Performances and interactive games were seamlessly interspersed, creating a relaxed yet organized atmosphere.     Laughter and cheers echoed throughout the venue, and in the moment the camera shutter clicked, the excitement and joy were captured in a single frame.     Eric said: "Let’s dream together, DERVOS's dream. A dream where we all play a part, piece by piece, it becomes a reality." For Dervos, the annual meeting is not just about "summarizing the year," but about bringing our hearts together, strengthening our resolve in doing the same thing, and then continuing to move forward, step by step, with steady progress.            

In 2025, Dervos organized its annual team trip, a five-day journey to Chongzuo, Weizhou Island, and Nanning in Guangxi Province. The trip aimed to provide relaxation and strengthen team communication, offering a well-paced and content-rich experience that combined natural landscapes with local cultural immersion. In Chongzuo, the team focused on nature sightseeing. Bamboo rafting tours allowed close observation of the local ecology and offered opportunities to see rare species such as the white-headed leaf monkey. The group also visited Detian Waterfall, experiencing its scale and flow firsthand. The overall itinerary was designed with a relaxed pace, providing ample time for rest and team bonding. Next, the team traveled to Weizhou Island. The volcanic landforms and coastal scenery added a unique visual dimension to the journey. Beyond sightseeing, participants engaged in local agricultural activities, including dragon fruit picking and banana harvesting, gaining insight into local lifestyles. The team also visited several beaches, fully appreciating the island environment. The final stop was Nanning. Team members explored the night market, sampled local specialties, and experienced the city’s daily life, bringing the Guangxi trip to a relaxed conclusion. This annual trip allowed the Dervos team to foster more natural communication and connection outside of work, recharging energy for the months ahead. Dervos remains committed to its guiding principle: I come, I see, I conquer!

In the export of industrial valves, packaging is often regarded as merely the final step before delivery. However, during actual transportation, packaging directly affects the overall condition of the valve during transit, handling, and even at the moment the customer unpacks it.   For industrial valves that must undergo long-distance transportation and multiple transshipments, packaging itself is an integral part of product quality. Based on extensive export experience, DERVOS has established a clear, stable, and repeatable valve packaging standard to ensure that valves are delivered to customers safely and in perfect condition.   1. Pre-Packaging Preparation and Product Verification   Before entering the packaging process, all valves undergo cleaning, inspection, and product information verification. This stage ensures that each valve is in a stable and fully controlled condition before packaging.   ● Remove oil and grease from the valve body surface ● Inspect flange sealing surfaces and the valve cavity to ensure no foreign matter is present ● Install and securely fix the nameplate to ensure product information is clear and identifiable   This process provides a reliable foundation for subsequent protection and transportation.   2. Internal Anti-Corrosion Treatment and Sealing Surface Protection   To address the conditions typically encountered during export transportation, valves receive targeted protective treatment prior to packaging:   ● The valve cavity is evenly coated with anti-rust oil to reduce the risk of corrosion in humid or salt-laden environments ● Protective covers are installed on all flange faces to prevent impact damage or contamination during handling and transport   These measures ensure that both internal components and sealing surfaces remain in good condition until the valves arrive at the customer's site.   3. Multi-Layer Inner Packaging and Individual Valve Protection   During the inner packaging stage, DERVOS applies a multi-layer cushioning structure to provide comprehensive protection for each valve:   ● Impact-resistant pearl cotton is placed around all sides and at the bottom of the inner carton ● Separators are installed between valves to prevent direct contact ● Each valve is individually wrapped with protective cushioning material, with special attention given to coatings and machined surfaces   This packaging structure effectively reduces the risk of paint damage, abrasion, and surface defects during transportation.   4. Custom Partition Fixing and User-Friendly Design   When multiple valves are packed in the same crate, custom wooden partitions are used to secure each unit:   ● Valves are precisely positioned according to their dimensions to prevent movement inside the crate ● Partitions feature chamfered edges, making it easier for customers to open the crate and remove the valves ●&nb...

Recently, representatives from Dervos Valve visited long-term industrial valve partners in Norway, Italy, Germany, and Spain. The multi-day trip focused on understanding customers’ current project requirements and discussing future procurement plans and technical specifications in greater depth.     In Norway, our team was invited to visit the customer’s equipment installation workshop and valve application site. Through direct discussions with the engineering and procurement teams, we gained a clear understanding of their concerns regarding high-pressure applications, material selection, and delivery schedules. The customer noted, “Dervos has an excellent grasp of our project needs. Your quick response and professional recommendations give us great confidence.” This feedback reflects not only trust in our product quality but also strong recognition of our service capabilities.   The team then traveled to Italy for technical discussions with our local partners and visited their valve assembly and testing facilities. Our representatives introduced Dervos’s manufacturing capabilities, quality inspection processes, and ongoing product enhancements across ball valves, gate valves, butterfly valves, and check valves. The Italian customer remarked, “The solutions you presented are highly practical and will significantly improve the reliability of our projects.” Such positive feedback further strengthened the confidence in our partnership.   Through this trip, Dervos gained deeper insights into the European market’s expectations regarding valve performance, quality control, and delivery reliability. We will continue to refine our products and services based on customer feedback, ensuring that every partner receives a reliable and fully tailored one-stop valve solution.   Looking ahead, Dervos Valve will remain committed to our service philosophy of listening to customers, responding quickly, and delivering real value. With higher product standards and more professional technical support, we aim to strengthen and advance our cooperation with customers around the world.