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!

The proper installation of the drain valve has a direct impact on the normal operation of the drain valve and the production efficiency of the equipment. The installation of the drain valve must follow the installation requirements of the drain valve in order to achieve better work efficiency for the drain valve and equipment. 1. Before installing the drain valve, it is necessary to use pressurized steam to purge the pipeline and remove any debris. 2. Before the drain valve, a filter should be installed to ensure that the drain valve is not blocked by pipeline debris, and the filter should be cleaned regularly. 3. Valves should be installed before and after the drain valve to facilitate its maintenance at any time. 4. The direction of condensate flow should be consistent with the arrow mark on the installation of the drain valve. 5. The drain valve should be installed at the lowest point of the equipment outlet to timely discharge condensate and avoid steam resistance in the pipeline. 6. If there is no drain valve installed at the lowest position of the equipment, a backflow bend (condensate lifting joint) should be added at the lowest position of the water outlet to raise the condensate level before installing a drain valve to avoid steam resistance. 7. The outlet pipe of the drain valve should not be immersed in water (if immersed in water, a hole should be drilled at the bend to break the vacuum and prevent sand from being sucked back). 8. Mechanical traps should be installed horizontally, while steam traps should not be installed in series. 9. Each device should be equipped with its own drain valve. 10. Thermostatic type steam traps need to have over one meter of non-insulated supercooled pipes in front of them, while other types of steam traps should be located as close to the equipment as possible. 11. When using a drain valve for drum drying (with siphon type) equipment, please indicate: use a drain valve with an anti-steam resistance device to avoid steam lock on the equipment. 12. If there is condensate recovery after the drain valve, the outlet pipe of the drain valve should be connected to the main pipe from above the recovery main pipe to reduce back pressure and prevent backflow. 13. If there is condensate recovery after the drain valve, pipelines with different pressure levels should be separated for recovery. 14. The condensate recovery main pipe behind the drain valve cannot climb a slope, which will increase the back pressure of the drain valve. 15. A check valve should be installed before the condensate enters the recycling main after the drain valve to prevent the condensate from flowing back. 16. Install a drain valve on the steam pipeline, with a condensate collection well located near the radius of the main pipeline, and then use a small pipe to lead it to the drain valve. 17. If the mechanical drain valve is not used for a long time, it is necessary to remove the drain screw and drain the water inside to prevent freezing. 1...

There are many types of valves and their range of use is also wide. If used improperly, there may be "running, emitting, dripping, and leaking" phenomena, with mild cases affecting production and severe cases causing accidents. So understanding and correctly using valves is a very important issue. There are many types of valves used in heating systems. For example, gate valves, globe valves, ball valves, butterfly valves, check valves, safety valves, regulating valves, balance valves, self-operated balance valves, and so on. 1. Gate valve, is a widely used type of valve. The sealing surface of the gate and the valve seat are highly smooth, flat, and consistent, and processed into a very close fitting and tight sealing pair. The gate plate conducts and shuts off the medium through the upward and downward pressure of the valve stem. It plays a shut-off role in the pipeline. 2. Globe valves are also widely used valves. Its working principle is similar to that of a gate valve, except that the closing part (valve disc) moves along the centerline of the valve seat. It plays a shut-off role in the pipeline and can also roughly adjust the flow rate. 3. Compared to gate and globe valves, ball valves are a new type of valve that is gradually being widely adopted. The valve core is a ball with a through cavity, which is controlled by the valve stem to rotate 90 ° to make the valve unobstructed or blocked. It plays a shut-off role in the pipeline. 4. Butterfly valves are currently the most widely used and diverse valve in heating systems. The valve disc is a disc that rotates through the valve stem and rotates at 90 ℃ within the valve seat range to achieve valve opening and closing. It plays a shut-off role in the pipeline. It can also adjust the flow rate. 5. Check valves are also known as single flow valves. It is a commonly used auxiliary valve. It is a valve that automatically opens and closes based on the force of the fluid itself and the weight of the valve disc. As the name suggests, its function is to prevent media backflow. Usually installed at the outlet of the water pump to prevent damage caused by water hammer. 6. The regulating valve is also called a control valve. It is a commonly used valve in the secondary network of heating systems. Its appearance and structure are similar to that of a shut-off valve, but the sealing pair is different. The valve disc and seat of the regulating valve are similar to the cork and mouth of a warm water bottle, and the flow rate is adjusted by changing the flow area through the movement of the valve disc. There is a ruler on the valve shaft indicating the corresponding flow rate. 7. Improved balance valve control valve. The flow channel adopts a direct current type, and the valve seat is changed to polytetrafluoroethylene. It overcomes the disadvantage of large flow resistance, makes the sealing more reasonable, and also has a cut-off function. 8. Self operated balance valve, also known as flow control valve. The...

The Numerical Control Multi-Pass Valve plays a crucial role in automating well selection and metering within oilfield metering stations. It replaces multiple metering pipe manifolds and electrically actuated three-way valve assemblies, streamlining well selection. Operated through control system automation or manual actuation, it enables automatic well switching, offering benefits like a compact footprint, streamlined operation, unmanned capability, and simplified installation. It can also be customized for specific needs, making it ideal for modernizing aging oil and gas metering stations on offshore platforms, artificial islands, and remote onshore areas. Features 1. Media Versatility: The valve handles various mediums, including light crude, heavy crude, oil-contaminated water, and clear water. 2. Simplified Operation: Streamlined control through a single multi-pass valve eliminates complex adjustments. 3. Cost-Effective: Fewer control units lead to investment savings of 20% to 30% compared to conventional systems. 4. High Sealing Performance: Self-compensating sealing and snug integration ensure zero leakage, supported by manual adjustments for maintenance. 5. Precision Engineering: Advanced positioning technologies enable near error-free well selection. 6. Durability and Efficiency: The hard-faced alloy sealing surface resists erosion, scaling, and extends service life. 7. Optimal Pressure Management: The system maintains a maximum pressure loss below 0.025 MPa.

According to the different structures of butterfly valves, we distinguish four types of butterfly valves: concentric butterfly valves, single eccentric butterfly valves, double eccentric butterfly valves and triple eccentric butterfly valves. Concentric butterfly valves, single eccentric butterfly valves, double eccentric butterfly valves and triple eccentric butterfly valves actually reflect a process of opening and closing with less and less effort and less and less wear on the sealing surface. By setting the position of the rotating shaft of the butterfly valve wedge, the sealing and opening states of the butterfly valve can be changed. Under the same conditions, the torque of the valve is greater than that of each opening. When the valve is opened, the rotation angle required for the valve plate to separate from the seal is smaller than the other. The structural feature of the concentric butterfly valve is that the shaft center of the valve stem, the center of the butterfly plate and the center of the valve body are at the same position. Generally, if concentric butterfly valves can be used, they should be used as much as possible. Because the concentric butterfly valve does not require high sealing performance in terms of structure or operation, it is a conventional product. To overcome squeezing, scraping, and ensure sealing performance, the valve seat of the concentric butterfly valve is basically made of elastic materials such as rubber or polytetrafluoroethylene, which is a soft sealing butterfly valve. This limits the use of concentric butterfly valves to temperature. In order to solve the squeezing problem between the butterfly plate and valve seat of the concentric butterfly valve, a single eccentric butterfly valve has also been produced. Its structural feature is that the axis of the valve stem deviates from the center of the butterfly plate. Double eccentric butterfly valves are the most widely used. Its structural feature is that the valve stem axis deviates from both the center of the butterfly plate and the center of the valve body, thus it is called a double eccentric butterfly valve. Many double eccentric butterfly valves are line sealed, causing friction between the butterfly plate and the valve seat when the sealing surface is closed, resulting in excellent sealing effect. It has the characteristics of small area and high pressure. After the valve is opened, the butterfly plate can quickly detach from the valve seat, greatly eliminating unnecessary excessive compression and scraping between the butterfly plate and the valve seat, reducing the opening resistance distance, reducing wear, and improving the service life of the valve seat. The triple eccentric butterfly valve has undergone a third eccentricity on the basis of the double eccentric butterfly valve, and the shape of the sealing pair is not a straight cone, but an inclined cone. It is mostly short distance force and surface sealing. The stem shaft of a three eccentri...