As a component used to achieve on/off and flow control in pipeline systems, electric butterfly valves are becoming increasingly popular in practical applications due to their excellent quality and performance! Electric butterfly valves can generally be divided into the most common types of electric clamp butterfly valves and electric flange butterfly valves according to their different connection methods. There are two types of sealing materials: soft sealing (normal temperature and pressure) and hard sealing (high temperature and high pressure). Working Principle Electric butterfly valves use electricity as the driving force. After adjusting the connection between the electric actuator and the valve stem and adjusting the electric butterfly valve, the electric seal is used as the driving force to drive the 0-90 ° rotation movement of the hard sealed butterfly valve plate. The electric butterfly valve receives 4-20mA industrial automation control system signals to accurately control the valve opening, thereby achieving the adjustment and control of different process parameters such as flow rate, temperature, and pressure. Installation Precautions (1) Electric butterfly valves should be installed vertically on horizontal pipelines. If there is a need for horizontally inclined equipment in special circumstances, support should generally be added. (2) The equipment location should have good environmental conditions, and the ambient temperature should be between -25 to +55 ℃. (3) Try to prevent equipment from being exposed to vibration sources, otherwise necessary anti vibration reinforcement measures should be taken. (4) When installing equipment, it is necessary to point the arrow direction on the valve body or flange towards the direction of the medium. (5) Before installing the equipment, it is necessary to carefully remove welding slag and other debris inside the pipeline. After installing the equipment, the valve core should be at a larger opening and the pipeline and butterfly valve should be cleaned again to prevent debris from getting stuck and damaging the saving parts. (6) Electric butterfly valves should be located in a position that is easy to maintain and repair. (7) The straight pipe section in front of the valve should be as long as possible. (8) Export piping should use straight pipe sections with a diameter of 3-5 times the pipeline diameter.

1. Leakage at the packing of butterfly valve Faults: (1) The filler has exceeded its usage period and has aged. (2) Excessive force during operation. (3) The live bolt is not tightened. Solutions: (1) Aging or damaged fillers should be replaced in a timely manner. (2) It should be operated uniformly with normal force, and no casing or other methods should be added. (3) Evenly tighten the bolts that hold down the packing. 2. Leakage at sealing surface of butterfly valve Faults: (1) The installation direction of the valve does not match the flow direction of the medium. (2) The butterfly valve does not close properly. (3) The butterfly valve that has been closed for a long time has accumulated scale on the sealing surface. (4) The sealing surface is severely damaged. Solutions: (1) Pay attention to installation inspection and ensure that it is tightly closed in place. (2) Open a gap in the valve and allow the high-speed fluid to flush away any dirt on the seal. (3) Re grind and thicken the adjusting gasket for compensation. 3. Leakage at the flange connection of butterfly valve Faults: (1) Uneven tightening force of bolts. (2) Aging and damage of gaskets. (3) The material used for the gasket does not meet the requirements of the working medium. Solutions: (1) Tighten the bolts evenly again. (2) Replace the gasket in a timely manner. (3) Select gasket materials and forms correctly according to the requirements of the working conditions. 4. Damaged at handle and handwheel of butterfly valve Faults: (1) Incorrect use. (2) Loose fasteners. (3) Damage to the connection between the handle, handwheel, and valve stem. Solutions: (1) Prohibit the use of pipe pliers, long levers, impact tools, etc. (2) Repair and repair at any time. 5. Jamming at worm gear drive of butterfly valve Faults: (1) Unclean embedded dirt, affecting lubrication. (2) Poor operation. Solutions: (1) Please keep it clean and refuel regularly. (2) If a bite is found during operation and there is significant resistance, the operation cannot continue, otherwise the damage will worsen. 6. Electric installation fault of butterfly valve Faults: (1) Poor lubrication, foreign objects stuck inside the valve causing excessive torque. (2) Motor malfunction. Solutions: (1) Oil should be added and kept clean to ensure that the oil pipe is in good condition, the packing is moderately compressed, and foreign objects are promptly removed. (2) The working time of the motor should not exceed 15 minutes, and the power supply should be normal. It should be avoided to touch and get damp.

With the continuous development of global industrialization, the safety requirements for equipment and pipeline systems are also increasing. Line blind valves have always played a crucial role in the safety and reliability of industrial facilities. Line blind valve has been widely used in various fields such as petrochemical, energy production, and chemical engineering. It provides more flexibility and safety for engineers and operators in various industries, helping to reduce maintenance costs and improve production efficiency. Adaptable Design In addition to its conventional design, the THD-Slide is available in variations tailored for High-Temperature, Fire Safety, and Non-Drip applications. For installations constrained by limited space, a compact version can be provided as well. Easy Seal Inspection In this design, the seals are housed within the spectacle plate. This characteristic offers the advantage of convenient access for inspection and seal replacement. Assessing the condition of these seals can be performed external to the operational process, prior to any position changes, thereby ensuring the integrity of the seal's quality. Cost Effectiveness The THD-Slide features a straightforward and robust design engineered to deliver complete shutdown, extended operational lifespan, and cost-effective service with minimal maintenance requirements. The distinctive mechanism for opening and closing the THD-Slide enables a single individual to rapidly and safely blind pipelines without the need for any tools or equipment. Mechanism Principle In normal conditions, the blind valve's diversion hole is in contact with the pipeline, and the blind valve is in the open position. When maintenance is required, and the pipeline must be cut off, then loosen the stem of blind valve to move the flat end onto the pipeline, and make the blind valve turn to closed position from open position; tighten the stem and let the blind valve to perform sealing function and cut off the pipeline. When the maintenance work is completed, loosen the stem and move the blind plate to the diversion hole and connected to the pipeline. The blind valve was turned to closed position from open one. Lock the stem, and seal it, the pipeline is now open, and the blind plate valve returns to the open position.

Three-way ball valves are mainly used in pipelines to cut off, distribute, and change the flow direction of the medium. Three-way ball valve is a relatively new type of ball valve, which has some unique advantages of its own structure, such as no friction on the switch, less wear on the seal, and small opening and closing torque. This can reduce the specifications of the equipped actuator. Three-way ball valves are available in T and L shapes. The T-shape can connect three orthogonal pipelines and cut off the third channel, playing a role of diversion and confluence. The L-type three-way ball valve type can only connect two orthogonal pipelines and cannot maintain the interconnection of the third pipeline at the same time, only serving as a distribution function. The working principle of a three-way ball valve is to rotate the valve core to make the valve unobstructed or blocked. Ball valves have the advantages of lightweight opening and closing, reliable sealing, simple structure, and convenient maintenance. Its small size allows it to be made into a large caliber. The sealing surface and spherical surface of ball valves are often in a closed state and are not easily eroded by media, making them widely used in various industries. 1. The three-way ball valve is easy to switch on the pipeline and has stable and reliable performance. 2. The three-way ball valve has a long service life, high flow capacity, and low resistance. 3. The selection of three-way ball valves should be based on the diversion requirements of the pipeline and should not be confused with each other.

DERVOS is delighted to announce our resounding success at the recent PCVExpo 2023, which took place from October 24th to 26th in Moscow, Russia. This exhibition attracted exhibitors and clients from many countries. Throughout the exhibition, DERVOS's booth witnessed a continuous stream of clients. They exhibited great interest in our products and services, engaging in in-depth discussions to understand our product features better. Our professional and responsive business team received accolades for delivering excellent service and a unique experience to every client. Our two star products, the Fully Welded Ball Valve and the Line Blind Valve, truly stood out at the exhibition. Furthermore, the clients at the exhibition were enthusiastic, often requesting to take photos with our two star products. This served as a compelling testament to the quality and popularity of our products. Additionally, we added a touch of cultural charm to the exhibition by offering two exquisite refrigerator magnets as special gifts for our valued clients. These magnets beautifully combined iconic symbols - one featuring the majestic Palace Museum paired with adorable panda, and the other portraying the splendid Saint Basil's Cathedral alongside the graceful Russian Bear. These unique and visually captivating magnets garnered immense attention at the exhibition. Here are the key features of these two products: Fully Welded Ball Valve: This product is celebrated for its excellent sealing and fully welded design. It finds applications across various industrial sectors, including petroleum, natural gas, chemical, and energy industries. Clients unanimously expressed that the exceptional performance and reliability of the Fully Welded Ball Valve make it their top choice. Line Blind Valve: DERVOS's Line Blind Valve also garnered significant attention at the exhibition. Renowned for its swift transition, economical solution and tool-less handling, this product is widely used in pipeline systems when there is a need for either complete closure or unimpeded flow transition without a significant drop in pressure. DERVOS remains committed to delivering high-quality valve products and excellent service to our clients. We extend our gratitude to every client who visited our booth during PCVExpo 2023 and look forward to building long-term partnerships with them. If you missed the exhibition, feel free to contact us at any time to learn more about our products and services. We are eager to provide you with outstanding valve solutions!

DERVOS is delighted to announce that we will be participating in PCVExpo 2023, scheduled to take place from October 24th to 26th, 2023, at Moscow, Crocus Expo, Pavilion 1, Hall 4. Our booth number is H549. At this industry event, we will be showcasing a range of cutting-edge products, including: · Fully Welded Ball Valve · Line Blind Valve · Double Block and Bleed Ball Valve · High Pressure Ball Valve · Cryogenic Ball Valve · Top-Entry Ball Valve Our team of experts will be on hand to provide in-depth product demonstrations and assist with addressing any questions or challenges you may encounter in the field of valve and control technology. We understand the importance of comprehending product features and performance when making informed decisions. Therefore, our team will be readily available to offer detailed product explanations to ensure you gain a comprehensive understanding of our offerings. PCVExpo is a global platform that brings together leading valve manufacturers, control technology experts, and industry leaders from around the world. It offers an exciting opportunity to explore the latest trends, innovations, and solutions in the valve and control technology industry. Your presence will undoubtedly enrich the event and add more value to our exhibition. We sincerely invite you to join us and explore the future of the valve and control technology field. If you plan to attend PCVExpo 2023, we would be delighted to provide you with further information. DERVOS team looks forward to meeting you at PCVExpo 2023!