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.
Q: Hi. I saw the butterfly valves in your website. Some of them is equipped with a handle,some a gearbox, and they all look to be about the same size. Are the two types of operation equivalent? When You Should Apply Gearbox To Butterfly Valve? A:Gearbox butterfly valves and handle butterfly valves are both butterfly valves that require manual operation, so both of them can also be referred to as manual butterfly valves. For small butterfly valves, the two types of operation can be common. The difference lies in the large-diameter butterfly valves. Specifically,manual operation is suitable for butterfly valves with a calibre ≤ DN200; And butterfly valves within DN200 can also be operated with agearbox. For butterfly valves of DN200 ormore,Gearbox operation is generally recommended. The reason is that as the calibre of the butterfly valve increases, so does the torque. When the calibre exceeds DN200, it will be very hard to operate with the handle, and the larger the calibre, the harder it will be to operated by a handle. Therefore, if the caliber is DN200 or more, it is better to use a gearbox. When Dervos chellenged to manufacture a butterfly valve of DN3750, we used 4 gearbox to drive the gaint guy. For more details welcome to click the picture to read the story. Dervos is a leading valve manufacturer and provider of engineered products for different industries in China. If you’re looking for professional feasible solutions, check out our vast range of high-quality valves which covers gate valves, ball valves, butterfly valves, as well as other control valves and more. For more information regarding our high-quality products, contact us today!
I believe that those of you who have dealt with valves are not unfamiliar with the names of these butterfly valves. However, Dervos found that there are still many friends who can't tell the differences between a concentric butterfly valve and aWafer butterfly valve, and some may even think that they are different names fora same valve. But it's not. This article will introduce you to the difference between a concentric butterfly valve and aWafer butterfly valve. Concentric butterfly valve isnamed after the structural form of the valve. In addition to concentric butterfly valve, there are also single eccentric butterfly valve, double eccentric butterfly valve, triple eccentric butterfly valve several.They are named conforming tothe position of the centre of the butterfly plate in the valve body.In terms of structure,the concentric butterfly valve is characterized by the stem axis, the butterfly plate centre and the body centre being in the same position. The concentric butterfly valve has a simple structure, and usually soft-seated. Rubber or PTFE or other resilient materials are most common;The concentric butterfly valve has very good sealing performance, and can achieve zero leakage. But limited by the sealing material itself, the concentric butterfly valve can only beapplied to normal temperature and low pressure environment. Its not recommended to use them in high temperature and high pressure. Wafer butterfly valve is named according to the butterfly valve's connection method. In addition toWafer, there are also flange connections,clamp connection,socket-ed,welded and so on. Wafer butterfly valves can be soft-sealed ormetallic-sealed; they can be ofconcentric or eccentric.A concentric butterfly valves may be either clamped or flanged. Aconcentric butterfly valve may be aWafer connection, and aWafer butterfly valve may also be ofconcentric construction. Therefore, the concentric and Wafer are two different butterfly valve classifications, the two are actually not comparable. Choose the correct butterfly valve according to the different working conditions, and that’s all. Dervos is a leading valve manufacturer and provider of engineered products for different industries in China. If you’re looking for professional feasible solutions, check out our vast range of high-quality valves which covers gate valves, ball valves, butterfly valves, as well as other control valves and more. For more information regarding our high-quality products, contact us today!
Can butterfly valves be used for hot water? In previous articles, we have introduced to you that butterfly valves are suitable for fresh water, sewage, sea water, salt water, steam, natural gas, food, pharmaceuticals, oil and other pipelines that require complete sealing, zero leakage in gas tests, high life expectancy and working temperatures from -10 degrees to 150 degrees. Weather butterfly valve can be used in hot water pipeline or not, in fact, the key lies in the valve seat sealing surface material ofthe butterfly valve body that contacts with hot wate rdirectly. The hot water we talk about is generally water above 70℃.There will be no problem at all if you use hard seal butterfly valves at these temperatures. But if it is a soft seal butterfly valve with a rubber sealed seat, can it be used for hot water? If you search the internet for the answer, you will see that many do not recommend the use of soft seal butterfly valves in hot water. The reasonis thatthe rubber seat of a soft seal butterfly valve will age more rapidly if it is exposed to hot water for a long period of time. The sealing performance of the valve will be damaged, thus shortening the service life of the valve. This statement is not a problem, the theoretical temperature range of rubber material is -20 ~ 150℃,but because of the various manufacturers produce rubber quality levels, inreal situations, this temperature range willnarrow down significantly in the hot water environment, of course. However, the soft seal butterfly valve is not completely inadequate for hot water piping. High temperature resistant rubber can be used, which is much more effective and lasts longer. And hard-sealed butterfly valves, ball valves, gate valves and globe valves can also be used instead. Dervos is a leading valve manufacturer and provider of engineered products for different industries in China. If you’re looking for professional feasible solutions, check out our vast range of high-quality valves which covers gate valves, ball valves, butterfly valves, as well as other control valves and more. For more information regarding our high-quality products, contact us today!
How time flies! Dervos had another challenging but fruitful year and is ready to step into its 13th year in the valve market. It’s time to celebrate its birthday. As usual, we spared a day for this big event of Dervos. The day, we call it the happy day, is comprised of a quite lot of activities. We rented a big house where there are a hoard of miscellaneous recreational facilities, for instance, karaoke, private cinema, AR game and so on. What’s more, its spacious kitchen and dining area are also in favor of our first activity--group cooking! The presumed ticklish part--you know, the participants are a group of urban white-collar workers who are fed by all the food delivery apps, what more do you expect from them?-- turned out to be more than amazing: Fish Filets in Hot Chili Oil, Meat Ball, Mushroom Stew and the impressive Sea Food Pot delivered by Eric, founder of Dervos. Speaking of the founder, the other one Ken brought a delicate cake shaped into the number 13, beautiful and palatable. Plus the exquisite dessert, the meal of that noon really set a wonderful beginning of the happy day. Then we move to the recreational area. If you see someone screaming BACK OFF! STAY AWAY FROM ME! wielding gamepad, shooting monsters on screen, don’t worry, that’s just Jona playing AR games. She’s probably going to win the most dedicated player prize if there were any. One more game I’d like to note is ring toss. The ring needs to circle the bottle and win you the gift coupon beneath it. I know it’s kinda old-stuff, but when you attend another game to win extra chances for ring toss if you don’t gain anything at first round, it would be more fun. The gamer needs to spin 5 circles and flip a bottle cap about 2 meters away at once, with one eye covered all the time. It was crazy dizzy, difficult and fun, cause you could never hit it accurately after 5 circles as you thought the cap was there but it was actually not. In the evening, after a string of group games like Guess the song name and Charade, the climax of the day came as the projection screen started playing a surprising video for West, also the game host, whose journey with Dervos has rang the 10-year bell and hasn’t anticipated for this part. After the video, Eric and Ken, on behalf of the big family, awarded him a secret anniversary gift. Now, let’s call it a day, or it would be better to be ‘let call it 13 years’. If Dervos were a 13-year-old boy, it is when the boy explores the world curiously and energetically. It is like a rising sun from the skyline, we’ll see his sun ray, glory and feel his warmth. Dervosers are striving for this day.
Dervos successfully passed the API-6D certification issued by the American Petroleum Institute (API), and today the certificate has been granted to Dervos, which is another upgrade of our qualification! In order to achieve deeper cooperation with customers, and to further meet the ever-increasing needs of our customers，Dervos has been constantly striving to improve the quality of our products and production strength, and to provide better products and services to our customers. We look forward to working with our customers to achieve a win-win situation! API certification API is the abbreviation of American Petroleum Institute (API), which was established in 1919 and is the first national business association in the United States and one of the earliest and most successful standard-setting chambers of commerce in the world. The organization was based on the characteristics of the industry and the needs of the industry itself. The API Code was developed in 1924 to provide technical specifications to guide the production of products related to the petroleum industry. Due to the advanced, universal and safe nature of the API Code developed by the API Organization and the expanding influence of the US oil industry in the world, the API Code has been widely adopted by countries around the world. As a result, the API Organization, originally meant to be an academic organization for the US petroleum industry, has now evolved into an authoritative academic organization for the petroleum industry that crosses national boundaries.
In order tobetter manage the work of each department, facilitate interdepartmental cooperation and improve working efficiency, Dervos officially released the company's ISO system document - DVS-procedure document on April 1, which will be officially implementedfrom the day Thenew ISO system documents include a total of 31 specification documents,coveringall the content of the existing departments of the company. These documents provide guidance and requirements for howDervos could manage production and serveour customers in a more thoughtful and effective way. Dervos, exploring the valve market for more than ten years, insists on bringing better quality products to the market. In the downturn of the market environment hit by the epidemic, we are still seeking and improving, hoping to serve our customers better.
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