Trunnion mounted ball valve DN300 PN63 full bore Double Block and Bleed PMSS seal(metal seal+soft seal）blowout proof stem gearbox operation with LF2 body, LF2+ENP ball/seat and 410 stem. Quick Detail Type Ball Valve Size DN300 Design Pressure PN63 Construction DBB,Trunnion mounted ball valve ConnectionType Flange OperationType Gearbox Operated Body Material LF2 Ball Material LF2+ENP Stem Material 410 Seat Material LF2 +ENP Design Code API 6D Face to Face Dimension API 6D End Connection ASME B16.5 Pressure & Temp ASME B16.34 Medium Water, Oil and Gas Origin China
Y type globe valve. CF8 body/bonnet, F304 disc/stem, SS304+flexible graphite gasket and bronze bolt and nut. Plug type disc and Raised face flange connection. Quick Detail Type Globe Valve Size 4 inch DesignPressure CL150 Construction Y Type Globe Valve Connection Type Raised Face Flange Connection Operation Handwheel Design Code ASME B16.34 Face to Face ASME B16.10 Test & Inspection API 598 Body Material CF8 Temperature Range -29~538℃ Application WOG
Inverted Pressure Balanced Lubricated Plug Valve is 2 inch and WCB body with metal seated. Apply to temperature lower than 80℃. Quick Detail Type Plug Valve Size 2” DesignPressure 150LB Construction Lubricated Type Plug Valve Connection Type Flange Connection Operation Lever/Wrench Design Code API6D Face to Face ASME B16.10 End Connection ASME B16.5 Pressure & Temp ASME B16.34 Test & Inspection API6D Body Material A216 WCB Temperature Range <80℃ Application WOG
The 8 inch Class 2500 gate valve is designed with pressure seal bonnet, butt weld connection, and gearbox operation. The 8 inch gate valve has carbon steel WCB body and trim 5. Quick Detail Type Gate Valve Size 8'' Design Pressure ANSI 2500 Construction Pressure Seal Bonnet, Flexible Wedge, Metal to Metal Seat ConnectionType Butt Weld (SW) OperationType Gearbox Operation Body Material A217 WC6 TrimMaterial Trim 5 Design Code API 600 Face to Face Dimension ASME B16.10 End Connection ASME B16.25 Pressure & Temp ASME B16.34 Medium Water, Oil and Gas Origin China Dimension & Material NPS DN Class 2 2 1/2 3 4 6 8 10 12 14 16 18 20 24 50 65 80 100 150 200 250 300 350 400 450 500 600 L(RF) 900LB 368 419 381 457 610 737 838 965 1029 1130 1500LB 368 419 470 546 705 832 991 1130 1257 1384 2500LB 451 508 578 673 917 1022 1270 L1(BW) 900LB 216 254 305 355 508 660 787 914 991 1092 1346 1473 1600 1500LB 216 254 305 406 559 711 864 991 1067 1194 1697 2500LB 279 330 368 457 610 762 914 1041 1118 1245 L2(RTJ) 900LB 371 422 384 460 613 740 841 968 1038 1140 1500LB 371 422 473 549 711 841 1000 1146 1276 1407 2500LB 454 514 584 683 927 1038 1292 H(Opne) 900LB 554 637 680 796 1084 1372 1494 1550 1960 2210 1500LB 554 637 767 875 1094 1372 1655 1834 2150 2260 2460 2721 2940 2500LB 610 654 753 850 1254 1374 1685 1894 2226 2382 2585 W 900LB 300 350 350 400 560 460* 610* 610* 610* 760* 1500LB 300 450 450 560 305* 460* 610* 610* 760* 760* 2500LB 500 500 600 600 460* 460* 610* Weight (RF) 900LB 50 84 92 154 341 622 950 1295 1720 2380 1500LB 60 91 128 182 394 795 1370 2120 2800 3870 2500LB 121 175 195 229 720 1295 2250 Weight (BW) 900LB 39 64 82 120 266 524 760 1090 1450 2018 1500LB 46 71 85 130 292 578 974 1615 2010 2815 3315 4150 5219 2500LB 88 135 144 158 500 892 1550 1978 2580 3780 5988 *Manual gear operator is recommended No. Part WCB WC6 WC9 C5 CF8 CF8M 1 Body A216 WCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M 2 Seat A182 F6a A182 F22 A182 F22 A182 F5 A182 F304 A182 F316 3 Wedge A216 WCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M 4 Stem A182 F6a SAEHNV3 A182 F304 A182 F316 5 Stuffing Box A216 WCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M 6 Seal Ring ANSI 316L Flexible Graphite+316 7 Split Ring Steel F6 F6 F6 A182 F304 F316 8 Back Ring Steel Steel Steel Steel SS SS 9 Bolt A193 B7 A193 B7 A193 B7 A193 B7 A193 B8 A193 B8 10 Nut A194 2H A194 2H A194 2H A194 2H A194 Gr.8 A194 Gr.8 11 Yoke A216 WCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M 12 Bolt A193 B7 A193 B7 A193 B7 A193 B7 A193 B8 A193 B8 13 Nut A194 2H A194 2H A194 2H A194 2H A194 Gr.8 A194 Gr.8 14 Packing Plate ANSI 410 ANSI 410 ANSI 410 ANSI 410 ANSI 304 ANSI 316 15 Packing Flexible Graphite(Braided and Ring) or PTFE 16 Split Pin Steel Steel Steel Steel Steel Steel 17 Eyebolt A193 B7 A193 B7 A193 B7 A193 B7 A193 B8 A193 B8 18 Gland A182 F6 A182 F6 A182 F6 A182 F6 A182 F304 A182 F316 19 Gland Flange A105 A105 A105 A105 A182 F304 A182 F316 20 Nut A194 2H A194 2H A194 2H A194 2H A194 Gr.8 A194 Gr.8 21 Stud A193 B7 A193 B7 A193 B7 A193 B7 A193 B7 A193 B7 22 Stem Nut Ni-resist A439-D2 23 Gear Box Purchased 24 Protector Steel 25 Nameplate ANSI 304 26 Rivet ANSI 304
The 8 inch 150 LB dual disc non return check valve, designed per API 594, has dual plate and lug connection. The retainerless dual plate check valve is made of duplex stainless steel 4A as its body and trim material. Quick Detail Type Check Valve Size 8'' DesignPressure Class 150 Construction Dual Plate Type, Retainerless Connection Lug Type Design & Manufacture API 594 End to End ASME B16.10 Connection ASME B16.5 Pressure & Temp ASME B16.34 Test & Inspection API 598 Body Material Duplex Stainless Steel 4A Trim Material Duplex Stainless Steel Media W.O.G. Design Feature 1.Shor face to face dimension 2.Small in size with light weight 3.Swift close of disc with small water hammer 4.Vertically or horizontally installed 5.Smooth flow passway with small flow resistance 6.Long cycle life and high reliability
The 1 inch 800LB female threaded globe valve has plug disc, reduced port and manual handwheel operation. The valve is made of A105N body and trim 5 as per API 602. Quick Detail Type Globe Valve Size 1'' Pressure Class 800 Construction Bolted Bonnet, Reduced Port, Outside Scew & Yoke ConnectionType NPT Female Thread OperationType Handwheel Operated Design Code API 602 End to End Dimension ASME B16.10 Connection ASME B1.20.1 Pressure & Temp ASME B16.34 Test & Inspection API 598 Body Material Forged Steel A105 TrimMaterial 13CR+Stellite Temperature Range -29℃~+427℃ Application Water, Oil, Gas Origin China Product Range 1.Size up to 4 inch 2.Design pressure between 150LB to 2500LB 3.Connection: flange, socket weld, thread 4.Operation: handwheel, gearbox, bare stem, with actuators 5.Body material: carbon steel, stainless steel, alloy steel 6.Trim material: trim 1, 5, 8, 10, 12, 16 and ect. 7.Bolted bonnet, pressure sealed bonnet, welded bonnet, screwed bonnet 8.Reduced bore, full bore Inspection Reports Along with each order, Dervos will provide inspection reports and material test reports free of charge after shipment. All these certificates will let you have a clear picture of inspection process and results. Plus, these reports can be used for traceability.
The Class 1500 4'' cryogenic ball valve is designed with extended stem for low temperature application. The valve is made of LF2 with fully welded body, butt weld end and gearbox operation. Design Feature -Fully welded & forged body -Extended stem or bonnet -Full port design and piggable -Anti blow-out stem -Antistatic function - Automatic cavity relief -Bi-directional seat and DBB design -With stem and seat grease fittings Quick Detail Type Ball Valve Size 4" Pressure ANSI 1500 Construction One-Piece Body, Fully Weld, Extended Stem or Bonnet, Full Port Connection Butt Weld Operation Gearbox Operated Body Material Low Temperature Steel A350 LF2 Design Code API 6D Pressure & Temp ASME B16.34 End to End Dimension ASME B16.10 End Connection ASME B16.25 Inspection API 598 Temperature Range -46℃~+200℃ Media Oil, Water, Gas Related Knowledge What is the difference between full bore and reduced bore ball valve? The internal diameter of a full bore ball valve is the same as the inner diameter of the pipe. The full bore ball valve has little resistance and pressure drop to the flow. Plus, the full bore ball valve is piggable. However, the internal diameter of a reduced port (standard port) ball valve is smaller than the inner pipe size. Flow restriction caused by the reduced port will cause a pressure drop. And sometimes a pig to clean the pipe will get stuck in the reduced port ball valve. Certificates Dervos could provide reports upon clients’ requests, such as ISO 9001, PED CE, EAC, API 607, API 6D, API 6A and etc.
The double offset high performance butterfly valve, with lever operation and lug body, is designed per API 609. The CF8M body and PTFE seat butterfly valve is more durable in serving the application. Quick Detail Type Butterfly Valve Size 3'' Design Pressure 150LB Construction Double Eccnetric, Soft Seat Connection Type Lug Operation Wrench Operated Design Code API 609 Face to Face ASMEB16.10 End Connection ASMEB16.5 Test & Inspection API 598 Body Material Stainless Steel CF8M Temperature Range -29℃~+150℃ Application Water, Oil, Gas Dimension Class 150 DN mm 40 50 65 80 100 125 150 200 250 300 350 400 NPS in 1 1/2 2 2 1/2 3 4 5 6 8 10 12 14 16 L mm 127 127 127 127 152 203.2 203.2 203.2 203.2 in 5 5 5 5 6 8 8 8 8 L1 mm 38.1 46 50.8 48 54 63.5 57 63.5 71.5 81 92 101.5 in 1.5 1.81 2 1.88 2.13 2.5 2.25 2.5 2.81 3.19 3.62 4 H mm 185 190 220 229 239 252 284 307 337 392 435 481 in 7328 7.48 8.7 9 9.4 9.9 11.2 12 13.3 15.4 17.1 19 D(W) mm 160 160 160 160 160 160 160 200 200 250 250 300 in 6.3 6.3 6.3 6.3 6.3 6.3 6.3 7.9 7.9 9.8 9.8 11.8 Weight (Kg) mm 12.5 13.5 17 38 72 105 148 182 230 in 8 9 10 10 11 14.5 34.2 66 98 134 168 200 Related Knowledge What is a high performance butterfly valve? A high performance butterfly valve is often designed with double offset and PTFE seat, to handle everything from general applications to viscous and corrosive liquids; corrosive gases and steam. Compared to concentric resilient seat butterfly valve, the disc of the high performance butterfly valve is arranged and positioned off the center of the pipe bore, which could reduce wear and tear to the valve during operation and increase sealing performance. In conlusion, high performance butterfly valve is applicable for higher pressure and temperature applications. Meanwhile, it has longer cycle life and better sealing ability.
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.
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!
We are thrilled to announce that Dervos has held a momentous celebration in Beijing, commemorating the company's remarkable 15-year journey. The joyous gathering brought together clients from different countries, forging deeper connections and strengthening the bonds between Dervos and our valued partners. It was a heartwarming occasion to express our sincere gratitude for the trust they have placed in us over the years. During the event, Dervos' founder Eric and Ken expressed heartfelt gratitude to clients, their valuable insights and feedback continuously inspire us to improve our products and services, allowing us to stay at the forefront of the industry. At Dervos, we take great pride in recognizing and supporting our employees' growth. With a team of experienced professionals, we strive to provide outstanding services to our clients. Dervos proudly recognized two remarkable employees, Jona and Susie, for their five years of dedicated service. The custom-crafted rings and necklaces, bearing their names and heartfelt wishes, symbolize our appreciation for their valuable contributions. In addition, we curated eight dragon-shaped molds, each concealing intriguing surprises. Once everyone selected their preferred dragon, they eagerly commenced the excavation process, which proved to be an engaging physical activity. After a brief endeavor, each participant successfully unearthed their coveted treasure: personalized seals with their names intricately engraved, adding a profound sense of commemoration to the occasion. We were delighted to receive heartfelt wishes from our customers. During the event, we invited them to inscribe their blessings to Dervos on Xuan paper and seal it with their personal stamp. To mark the occasion, Eric and Ken imprinted Dervos' seal, symbolizing the enduring bond between Dervos and our partners. This act beautifully encapsulates the spirit of unity and mutual commitment, reaffirming that Dervos and our partners will stand together through the test of time. Amidst the jubilant ambiance, the Dervos team couldn't resist showcasing their individual talents. West's soulful voice filled the air with a captivating song, while Sheila mesmerized the audience with her fiery dance performance. The infectious spirit of celebration inspired everyone to join in the revelry, creating a harmonious dance ensemble as they moved in sync with the joyful rhythm. Reflecting on the past 15 years, Dervos has achieved significant milestones and overcome numerous challenges, growing from strength to strength. Our commitment to excellence, innovation, and customer satisfaction has been the driving force behind our enduring success in the global market. Dervos looks forward to many more years of shared success with our esteemed clients, as we continue on this remarkable journey together.
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