A steam trap valve is a device designed on devices that require steam, which can automatically discharge condensate, air, and non condensable gases from the steam system and prevent steam from being discharged. Important Functions (1) Able to quickly remove condensate generated; (2) Prevent steam leakage; (3) Remove air and other non condensable gases. The necessity of using steam equipment to remove condensate and air: (1) Prevent water hammer: If there is condensate in the steam pipeline, it will be strongly impacted by the high-speed flowing steam on the pipe wall, valves, and steam equipment, causing damage or damage to the pipeline bends, valves, and steam equipment. (2) To prevent a decrease in the efficiency of steam using equipment: Steam using equipment (especially indirect heating devices) is aimed at effectively utilizing the latent heat of steam. Excessive condensate trapped in these devices comes into contact with the heating surface, reducing the heating area and uneven heating up and down, resulting in a significant decrease in equipment efficiency. (3) Prevent corrosion of steam inside equipment: Oxygen in water and air coming into contact with the equipment can cause chemical reactions, leading to rust corrosion. (4) Prevent damage to steam using equipment: Due to the different temperatures of steam and water, the condensed water inside the equipment generates temperature differences locally, causing temperature difference stress and equipment damage. Specific requirements for steam trap valves: (1) No steam leakage during the discharge of condensate; (2) It can eliminate all condensed water from any part of the steam system; (3) Capable of simultaneously discharging air and condensate; (4) Suitable for a wide range of pressures; (5) Easy to repair and maintain: simple structure with few moving parts; (6) High practicality: small size, light weight, long lifespan, low price, and no loss of emission capacity due to air and steam.
In industrial production, high-pressure ball valves play a crucial role, and damage to the sealing surface may lead to leakage and performance degradation. Therefore, measures must be taken to prevent and protect the sealing surface. 1. Proper Operation and Usage When operating high-pressure ball valves, it is essential to follow the correct operating procedures and technical requirements. Do not exceed the rated pressure and temperature range of the valve. Avoid over-tightening the valve to prevent damage to the sealing surface or premature wear. 2. Regular Inspection and Maintenance Regularly inspect the sealing surface of the ball valve, especially valves exposed to high-pressure and high-temperature environments. Remove any debris and dirt around the valve to ensure the sealing surface is in good working condition. 3. Select Appropriate Sealing Materials Choose suitable sealing materials according to the requirements of the working environment. For instance, in high-temperature or chemically corrosive environments, select sealing materials that are resistant to high temperatures and corrosion. Regularly inspect the wear and aging of sealing materials and promptly replace damaged seals. 4. Preventing Foreign Object Intrusion Install filters or screens to prevent foreign objects from entering the valve body and damaging the sealing surface. Avoid conducting messy operations around high-pressure ball valves to reduce the intrusion of external impurities. 5. Timely Repair and Replacement If damage or wear is found on the sealing surface, stop using it immediately and proceed with repairing or replacing the seals to prevent leaks from causing more serious issues. 6. Training and Education Provide training to operators to ensure they understand the working principles and proper operation methods of high-pressure ball valves, reducing the risk of seal surface damage due to operational errors. 7. Minimize Frequent Opening and Closing Reduce the frequency of opening and closing high-pressure ball valves because frequent operation increases wear and fatigue on the sealing surface, leading to premature failure. Where possible, take measures to minimize valve cycling, such as planning production schedules rationally or employing automated control systems. 8. Regular Cleaning and Maintenance Perform regular cleaning and maintenance on high-pressure ball valves to remove accumulated dirt and deposits inside the valve body, ensuring the valve operates smoothly and the sealing surface remains clean. Regular cleaning effectively reduces contamination and corrosion of the sealing surface, extending the lifespan of the seals. 9. Choose High-Quality Ball Valves Select high-quality high-pressure ball valve products to ensure that the design and manufacturing quality of the valves meet standard requirements and possess excellent performance and reliable sealing capabilities. Valves from DERVOS typically offer longer lifespan and better sealing effects, effectively...
Stainless steel trunnion mounted ball valve is a commonly used valve type, usually used to control the flow of fluids (such as water, gas, steam, etc.) in pipelines. Advantages: 1. High-pressure resistance. 2. Corrosion resistance due to stainless steel material. 3. Excellent sealing performance with advanced sealing technology. 4. Using PEEK valve seats, zero leakage, and light torque. 5. Robust structure for high reliability. 6. Convenient operation, including remote control, enhancing system efficiency. 7. Wide applicability across industries such as petroleum, chemical, natural gas, and metallurgy. Stainless steel trunnion mounted ball valve is a reliable valve type suitable for various industrial scenarios, especially in environments that require corrosion resistance and high temperature resistance accompanied by corrosion.
Product Origin:
ChinaColor:
CustomizationShipping Port:
Ningbo/Shanghai,ChinaLead Time:
30~55 days Ex Works After Order ConfirmationMaterial:
ASTM A105Method of Operation:
HandwheelThe bellows seal globe valve adopts the bellows seal design, which completely eliminates the shortcomings of the normal valve stem packing seal aging and easy to leak, not only improves the energy efficiency, increases the safety of the production equipment, reduces the maintenance cost and frequent maintenance. It also provides a clean and safe working environment.Its simple structure and the low price makes it almost no "competitors".
Quick Detail
|
Type |
Globe Valve |
|
Norminal Size |
1.5 Inch |
|
NorminalPressure |
150LB |
|
Construction |
Bolted Bonnet, Outside Screw & Yoke, Rising Stem, Bellow Seal |
|
ConnectionType |
RF Flange |
|
Operation |
Handwheel |
|
Design Code |
ASME B16.34, API 602 |
|
Face to Face |
ASME B16.10 |
|
Flange End |
ASME B16.5 |
|
Test & Inspection |
API 598 |
|
Body Material |
ASTM A105 |
|
ApplicableTemp |
-29℃~+425℃ |
|
Application |
Water, Oil, Gas |
Structure Feature
1. Double seal design (corrugated pipe + packing). If the bellows fails, the stem packing will also be avoided;
2. External leakage, and in line with international sealing standards;
3. No fluid loss, reduce energy loss, and improve plant equipment safety;
4. Long service life, reduce the number of maintenance, reduce operating costs;
5. Rugged bellows seal design, ensuring zero leakage of the valve stem, providing maintenance-free conditions.
Technical Drawing
Dimension
Our Service
Dervos customer service is one of our biggest competitive advantages. In Dervos, we provide-
1.Quotation within 24 hours or no later than 3 days
This will let you meet the quotation submission deadline and enhance your working efficiency
2.Weekly status report of your order
In this way, you will have a clear picture of your order. You do not need to waste time on pushing us for status update
3.An 18-month warranty period
A warranty certificate will issued after shipment and you will not have any concern after buying valves.
4.Solutions to complaints within 3 days
Quick and responsible actions to complaints will protect your reputation and reduce the financial loss as much as possible.
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
The 1.5 inch 800LB bellow seal globe valve is designed with outside screw and yoke, handwheel operation, sw end. The reduced port globe valve is has forged steel A105N body. Design Feature 1.Outside screw and yoke 2.Rising stem 3.Bolted bonnet design 4.Bellow seal packing for reliable stem sealing 5.Reduced bore design 6.Handwheel Operated Quick Detail Type Globe Valve Size 1.5'' Design Pressure Class 800 Structure BB, OS&Y, Reduced Port, Bellow Seal Packing Connection Type Socket Weld Operation Handwheel Design Code API 602 End to End ASME B16.10 Connection End ASME B16.11 Pressure & Temperature ASME B16.34 Test & Inspection Standard API 598 Body Material Forged Steel ASTM A105 Trim Material Trim 8 Applicable Temperature -29℃~+425℃ Application W.O.G Origin China Related Knowledge What is a bellw seal valve? For bellow seal globe valves, the lower end bellows is welded on the valve stem to prevent the process fluid from eroding the valve stem. The other end is placed between the valve body and the valve cover to form a static seal. The double seal design ensure that if bellow seal pakcing fails, the stem packing will also function. The bellow seal globe valves are applicable for media like steam, flammable, explosive, heat transfer oil, high purity, and toxic media etc. Special Tests Besides general tests we will do (hydraulic and air test), we could also do tensile strength test, metallographic test, fugitive emission test, and NDE test (UT,RT,PT,MT) upon customers’ specific requests.
Dervos bellow seal globe valve is designed as per EN13709 with face to face dimesnsion per EN558. The special designed bellow seal make sure zero leakage from stem. Quick Detail Type Globe Valve Norminal Size DN 65 NorminalPressure PN 40 Construction Bolted Bonnet, Rising Stem, Bellow Sealed ConnectionType RF Flange Operation Handwheel Design Code EN13709 Face to Face EN 558 Connection EN1092 Test & Inspection EN12266 Body Material Carbon Steel 1.0619 Bellow Material SS304, SS316, SS316L and etc ApplicableTemp -29℃~+420℃ Application Water, Oil, Gas Structure Feature 1. Standard design of double-wall bellow seal 2. Heat-dissipating bonnet design; 3. With lubricant storage device; 4, With design of circlip to fix stem nut; 5. Reasonable product structure, reliable sealing performance and good appearance; 6. The sealing surface is welded with Co-based hard alloy, which has good wear resistance, corrosion resistance, anti-friction performance and long service life; 7. Stem has nitriding treatment with good corrosion resistance and anti-friction performance; 8. With position indicator for stem movement;
API 6D ball valve is designed with an extended stem for special use, like underground ball valve or low temperature application. The length of the extended stem can be customized as per client's request. Quick Detail Type Ball Valve Size 2 Inch Pressure Class 600 Construction Split Body, Side Entry, Floating Type, Firesafe Design, Antistatic System, Anti-Blowout Stem, Extended Bonnet Connection RF Flange Operation Mode Lever Body Material A105N Trim Material SS304 Ball and Stem, RPTFE Seat Design & Manufacture API 6D Pressure & Temp Code ASME B16.34 End to End ASME B16.10 End Connection ASME B16.5 Inspection API 6D, API 598 Temperature Range -29℃~+200℃ Medium Oil, Water, Gas QC Process in Dervos Casting inspection： We can find out the raw material’s problem, such as shoddy casting, unqualified wall thickness, chemical composition and so on, which ensure that you will not be cheated. Machining Inspection: -Ensure machining accuracy -Find out machining mistake as early as possible, to win more time for repairing, remaking Final Inspection: -Final inspection activities include document and QC record review, visual examination, dimension check, pressure test, painting and packing check -Save time and cost: you don’t need to come and inspect in person and all the documents could be provided as proof. Inspection report will be provided free of charge including: -EN 10204 3.1 Mill Test Certificate -Inspection Report, showing the whole inspection process
DN80 PN10 exhaust valve is made according to CJ/T217-2005 standard. The valve body is made of QT450. Its connection mode is EN1092-1.
The PTFE fully lined butterfly valve is made of cast iron body and with gearbox operation. The 14 inch flanged valve has concentric type structure. Quick Detail Type Butterfly Valve Size 14'' Design Pressure 150LB Construction Concentric Type, PTFE Lined Connection Type Double Flanged Operation Gear Operated Design Code API 609 Face to Face ASMEB16.10 End Connection ASMEB16.5 Test & Inspection API 598 Body Material Cast Iron GGG40 Temperature Range -15℃~+150℃ Application Water, Oil, Gas Related Knowledge What is the advantage of fully lined butterfly valve? The main advantage of lined butterfly valve is that it can handle abrasive and corrosive application at a relatively lower cost. The PTFE or PFA flexible seat provide a zero leakage sealing performance. Plus, the lined material PTFE has strong corrosion resistance, stable performance, low friction coefficient, which make the lined butterfly valve has a long service life. How does Dervos control quality of raw material? Raw material plays an important role in product quality. Likewise, casting and forging affect valve quality a lot. That is why Dervos pay a lot of attention to foundries. We have an approval list of foundries and classify them by certificates, scale, process and materials. To meet different requirements from customers, we could even appoint suitable foundries for our customers.
2" 150LB ball valve is made according to ISO17292 standard. The valve body is made of B148 C95400. It has the structural characteristics of full flow, floating ball, anti-fire, anti-static and anti-flying valve stem. Its operation mode is lever and connection mode is RF.
10’’ ~ 24’’ 600LB gate valve is made according to API 6D standard. The valve body is made of A516 Gr70. It has the structural characteristics of parallel gate. The operation mode is gear operation.
Made as per API6D, the two pc floating ball valve, 3/4inch and 150LB, has different ends.Find your floating ball valve or other valves easily in Dervos.
The 1 inch 1500LB y strainer is made of forged steel body and stainless steel 304 as the screen material. The high pressure y strainer with sw end is designed as per ASME B16.34. Design Feature 1.Forged Steel Body 2.Stainless Steel Screen 3.Customized Mesh for Screen 4.Installed Horizontally or Vertically 5.Ability to handle higher pressure Quick Detail Type Strainer Size 1'' DesignPressure 1500LB Construction Y Type Strainer, Bolted Bonnet ConnectionType SW ( Socket Weld) Design Code ASME B16.34 Face to Face ASME B16.10 End Connection ASME B16.11 Pressure & Temp ASME B16.34 Test & Inspection API 598 Body Material ASME A105 ScreenMaterial SS304 TemperatureRange -29℃~+425℃ Application Water, Oil, Gas Related Knowledge What is the difference between Y strainer and basket strainer? Both y strainer and basket strainer take their name from their configurations. There are four differences between them. -First, y strainer can be installed either horizontally or vertically. But in most cases, basket strainer could only be in horizonal position. -Second, y strainer could handle higher pressure rating than basket type. -Third, for the ability to screen particulate, basket strainers are better than y strainers. -Lastly, basket strainer is easier to be cleaned than the y type strainer. In conlusion, Y-strainers are applicable for high-pressure pipelines with a low concentration of particles & solids and less cleaning needs. Vice versa for basket type strainer.
3/4" 150LB gate valve is made according to API 602 standard. The valve body is made of ASTM A182 F316L. It has the structural characteristics of bolt cover, rising stem and rigid wedge. Its connection mode is RF integral flange. And it has hand wheel operation mode.
4" 600LB ball valve is made according to API 6D standard. The valve body is made of ASTM A216 WCB. It has the structural characteristics of split type, fixed ball, full bore, fireproof, anti-static, anti-flying valve stem. Its connection mode is RF.
The 12 inch 150 LB cast steel globe valve is made of carbon steel WCB body and trim 8, with gearbox, RF flange, BB, and plug disc. Quick Detail Type Globe Valve Size 12'' Pressure Class 150 Construction Bolted Bonnet, Straight Pattern,Plug Disc, OS&Y Connection Flanged Connection Operation GearOperated Design Code BS 1873 Face to Face ASME B16.10 Flange Connection ASME B16.5 Pressure & Temp ASME B16.34 Test & Inspection API 598 Body Material A216 WCB TrimMaterial Trim 8 Temperature Range -29℃~+427℃ Application WOG Origin China Dimension Class 150 NPS in 2 2 1/2 3 4 5 6 8 10 12 DN mm 50 65 80 100 125 150 200 250 300 L-L1 (RF-BW) in 8 8-1/2 9-1/2 11-1/2 14 16 19-1/2 24-1/2 27-1/2 mm 203 216 241 292 256 406 495 622 698 L2 (RTJ) in 8-1/2 9 10 12 14-1/2 16-1/2 20 25 28 mm 216 229 254 305 368 419 508 635 711 L3 mm 102 108 121 146 178 203 248 311 349 H (OPEN) in 14-11/16 15-3/8 16-9/16 20-1/4 21-3/16 22-5/15 24-5/8 28 39 mm 373 390 421 515 538 567 626 712 990 W in 7-7/8 9-7/8 9-7/8 11-13/16 11-13/16 13-3/4 15-3/4 17-3/4 24 mm 200 250 250 300 300 350 400 450 610 WT (kg) RF 22 29 42 64 77 105 154 288 507 BW 19 25 34 49 65 82 131 249 430 Related Knowledge What is the difference between a gate valve and a globe valve? Gate valves and globe valves are two of the most common valves we know. The differences beween them are: 1.Gate valve is used only for on-off function. But the globe valve could be used for shutting off and throttling at the same time. 2.The flow resistance of a globe valve is larger than a gate valve. Likewise, globe valves have more pressure drop than gate valves. 3.The gate valve require larger installation space than a globe valve from the perspective of opening height. 4.The gate valve sealing face suffers more abrasion than a globe valve. 5.The torque value of a globe valve is larger than a gate valve. Quality Checking Quality means everything in Dervos. Quality checking team will do inspections according to standard procedure and provide reports. Our QC team will check valve quality from casting and forging, machining, pressure testing, dimension checking, painting & packing.
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