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.

Butterfly valves are widely used as regulating and shut-off devices in industrial piping systems, valued for their simple structure, lightweight design, and rapid open-close operation. They find applications across water treatment, chemical, metallurgical, power, oil, and gas industries.   However, even high-quality butterfly valves can experience performance degradation if proper maintenance is neglected over long-term operation.This article explores the structural features, common issues, and maintenance practices to help effectively extend the service life of butterfly valves.   1. Understanding the Operational Characteristics of Butterfly Valves   A butterfly valve primarily consists of a valve body, disc, stem, sealing elements, and an actuator. Its operation relies on the rotation of the disc, driven by the stem, to control fluid flow.   During operation, the disc remains immersed in the fluid, subject to erosion, corrosion, and pressure shocks. Therefore, the valve’s lifespan is closely related to sealing performance, material selection, and the operating environment.   2. Common Factors Affecting Butterfly Valve Lifespan   Frequent Operation and High Differential Pressure High-frequency cycling or prolonged operation under high pressure and flow velocity can cause valve seat wear and stem seal aging.   Corrosive Media and Sediment Build-Up Chemical fluids or particulate-laden media can corrode the disc and clog sealing surfaces, reducing smooth operation.   Improper Installation Misalignment between the valve and pipeline, or uneven bolt tightening, may lead to eccentric disc friction and damage to sealing elements.   Lack of Regular Maintenance Neglecting routine cleaning and lubrication can increase operating torque, accelerate seal wear, and shorten the valve’s overall service life.   3. Maintenance Tips to Extend Butterfly Valve Lifespan   1. Proper Installation as the Foundation Ensure the valve body is aligned with the pipeline center to avoid eccentric stress. Use appropriate gaskets between the valve and flange to prevent localized stress. For actuated butterfly valves, confirm correct travel adjustment to avoid exceeding torque limits.   2. Regular Cleaning and Inspection Periodically remove deposits and debris from the disc surface to prevent seal surface damage. Check stem packing and seals; replace immediately if signs of aging are detected. For pipelines carrying particulate-laden media, flush the valve regularly to prevent clogging.   3. Lubrication and Corrosion Protection Apply grease to the stem, bearings, and drive components regularly to maintain smooth operation. For valves operating in seawater or corrosive environments, select corrosion-resistant coatings or materials such as aluminum bronze or duplex stainless steel.   4. Proper Operation and Control  Avoid rapid or forced operation to prevent disc deformation from impact. If the ...

체크 밸브는 역류를 방지하는 중요한 장치로, 수처리, 석유 및 가스 파이프라인, 화학 처리, 증기 시스템에 널리 사용됩니다. 장기간 작동 시 체크 밸브는 누출, 진동 소음, 고착 등의 문제가 발생할 수 있습니다. 이러한 문제를 신속하게 해결하지 않으면 시스템 효율이 저하되고 장비 손상이나 안전 위험을 초래할 수 있습니다. 그렇다면 체크 밸브를 교체해야 하는지 어떻게 알 수 있을까요? 어떤 결함을 수리할 수 있고, 어떤 결함을 완전히 교체해야 할까요? 이 글에서는 체계적인 가이드를 제공합니다. 1. 기본 작동 원리 체크 밸브 체크 밸브의 주요 기능은 역류를 자동으로 방지하는 것입니다. 유체가 의도한 방향으로 흐르면 밸브 디스크가 압력에 의해 열리고, 흐름이 반대 방향으로 흐르면 디스크가 자체 무게나 스프링을 사용하여 자동으로 닫혀 역류를 방지합니다. 일반적인 유형은 다음과 같습니다. 리프트 체크 밸브 스윙 체크 밸브 듀얼 플레이트 웨이퍼 체크 밸브 볼 체크 밸브 설계는 다양하지만, 체크 밸브를 교체해야 하는지 판단하는 주요 기준은 밀봉 성능, 작동의 원활함, 구조적 무결성으로 동일합니다. 2. 체크 밸브 교체 필요성 판단 방법 눈에 보이는 누출(내부 또는 외부) 밸브를 닫았을 때 유체가 계속해서 역류하면 밀봉 표면이 심각하게 마모되었거나 변형되어 효과적인 밀봉이 이루어지지 않는다는 것을 나타냅니다. 누출이 시스템 허용 오차를 초과하고 세척이나 표면 재연마로 해결할 수 없는 경우, 밸브나 밀봉 부품을 교체해야 합니다. 밸브 디스크가 붙거나 유연하지 않음 장기간 작동하면 밸브 스템, 가이드 또는 디스크가 스케일링, 부식 또는 이물질로 인해 끼일 수 있습니다. 세척, 석회질 제거 또는 윤활로도 원활한 작동이 회복되지 않을 경우 교체하는 것이 좋습니다. 과도한 소음 또는 진동 잦은 개폐나 디스크의 급격한 반동으로 인해 진동이나 두드리는 소리가 발생할 수 있습니다. 이는 일반적으로 스프링 고장, 느슨함 때문에 발생합니다. 판막 부품 또는 가이드 마모. 소음이 지속적이거나 빈번하게 발생하면 밸브의 구조적 무결성을 검사하고 교체를 고려해야 합니다. 부식되거나 균열이 생긴 밸브 본체 또는 커버 산성, 알칼리성 또는 고온 유체에 노출되면 밸브 본체가 부식되거나 균열이 생겨 구조적 강도가 약해지고 안전 위험이 발생할 수 있습니다. 이러한 손상은 수리할 수 없으며 밸브를 완전히 교체해야 합니다. 잦은 역류 또는 비정상적인 시스템 압력 변동 밀봉이 불량하거나 밸브 반응이 늦어지면 수격 현상�