The installation requirements of fully welded ball valves in underground pipelines are crucial, as the unique characteristics of the underground environment pose higher demands on the performance and safety of the valves. Proper installation not only ensures the normal operation of the valves but also prolongs their service life and enhances the safety and reliability of the pipeline system. The following are the specific requirements for installing fully welded ball valves in underground pipelines: 1. Selecting the appropriate valve type When installing fully welded ball valves in underground pipelines, it is necessary to choose the appropriate valve type based on the operating conditions and fluid characteristics of the pipeline system. Fully welded ball valves, with advantages such as simple structure and reliable sealing, are suitable for high-pressure, high-temperature, and corrosive fluid applications in pipeline systems. 2. Underground burial depth consideration When installing fully welded ball valves, it is imperative to consider the depth of underground burial. Typically, the burial depth of underground pipelines should comply with relevant standards and specifications to ensure the valves are positioned securely while facilitating maintenance and operation. 3. Corrosion protection measures The dampness of the underground environment and the presence of chemicals in the soil can lead to corrosion and damage to valves. Therefore, when installing fully welded ball valves, it is necessary to implement appropriate corrosion protection measures. This includes selecting valves manufactured from corrosion-resistant materials and applying corrosion-resistant coatings to the valves to extend their service life. 4. Sealing performance requirements Fully welded ball valves in underground pipeline systems must possess excellent sealing performance to prevent fluid leakage and contamination of groundwater sources. During installation, it is imperative to ensure that the valve's sealing components are intact and properly installed to ensure that the sealing performance meets design requirements. 5. Consideration of groundwater level fluctuations Fluctuations in groundwater levels may affect the operational status and safety of fully welded ball valves. When selecting installation locations, it is essential to consider the range of groundwater level fluctuations and implement corresponding waterproofing measures to prevent groundwater from affecting the valves. 6. Regular inspection and maintenance The underground environment has a significant impact on fully welded ball valves; therefore, regular inspection and maintenance of the valves are essential. Inspection tasks include assessing the sealing performance of the valves, checking the condition of moving parts, evaluating the effectiveness of corrosion protection measures, and promptly addressing any issues to ensure the safe operation of the valves. When installing fully welded ball valves in unde...
We are delighted to announce that our company is on the brink of a new beginning - the acquisition of a new office space. This marks a fresh start for our company's development, and we eagerly anticipate crafting a brighter future in this new environment. The selected location enjoys excellent geographic positioning, convenient transportation, and a pleasant environment. The choice of our new office space has been meticulously considered, aiming to provide our employees with a spacious and comfortable working environment while offering ample support and motivation for the company's development. Starting from April 15, 2024, our office address will be changed to: [Unit 3104, Channel Pearl Plaza, No.99 Yilan Road, Siming District, 361008, Xiamen City, Fujian Province, China]。This relocation is not only a natural choice for the continued development of our company, but also a testament to our confidence and aspirations for the future. The utilization of the new premises will further enhance internal collaboration and communication within the company, ignite the creativity and vitality of our team, and elevate our efficiency and service standards. We aim to deliver even higher-quality products and services to our customers and partners as a result. Finally, we would like to express our heartfelt gratitude for your long-standing support and trust in our company. We believe that this new beginning will bring forth fresh hope and opportunities. We will continue to uphold the principle of 'Customer First, Innovative Development', striving for excellence and working towards our long-term corporate goals. Let us join hands and work together to create a brighter future.
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.
Payment:
30% T/T When Order, 70% T/T Before ShipmentProduct Origin:
ChinaColor:
CustomizationShipping Port:
Shanghai ChinaLead Time:
35~60 days Ex Works After Order ConfirmationMaterial:
Stainless Steel Gate ValveMethod of Operation:
GearboxThe stainless steel knife gate valve is designed with DN800 PN6 flange end and gearbox operation. The soft seated knife gate valve has a unidirectional sealing.
Quick Detail
|
Type |
Gate Valve |
|
Size |
DN800 |
|
Design Pressure |
PN6 |
|
Construction |
Unidirectional, Soft Seated |
|
ConnectionType |
Flange End |
|
OperationType |
Gearbox Operated |
|
Body Material |
CF8M |
|
DiscMaterial |
SS316L |
|
StemMaterial |
SS316 |
|
SeatMaterial |
PTFE |
|
Design Code |
MSS SP81 |
|
Medium |
Water, Oil and Gas |
|
Origin |
China |
Dimension Checking
Pressure Tesing
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The 6 inch stainless steel gate valve, designed as per MSS-SP-81, has the lug type connection per Class 150 and electric actuator. Quick Detail Type Knife Gate Valve Size 6'' Design Pressure ANSI 150 Construction Knife Type Gate Valve ConnectionType Lug Type OperationType Electric Actuator Body Material ASTM A351 CF8 TrimMaterial SS304 Design Code MSS SP81 Medium Water, Oil and Gas Origin China Related Knowledge What are knife gate valves used for? Knife gate valves are originally designed for paper industry. The knife gate valve is especially applicable for heavy liquids with solid particulates, like slurry liquid, that are most corrosive, erosive and abrasive. Compared to wedge gate valve, the knife gate valve has a shorter end to end dimension and lighter weight. Plus, the knife valve has a more sharpened disc to cut through slurry and viscous medium. Both wedge gate valve and knife gate valve can only be used for on-off function not for regulating the flow. Dervos Customer Service With Dervos customer service, you will not have any concern before, during and after buying valves. Pre-sales We will reply on time and also provide technical support upon your request. Order We will check the production details with factory and customers. Sales confirmation will also be sent. During production, we will also send weekly report to let you know the order status. Before shipment, delivery note will be sent to let you know the situation. 18 Month warranty Dervos is always responsible for their products. We will provide 18 months warranty to let our customers without concern.
The knife gate is a bi-directional lug type valve designed according to MSS-SP-81 and for industrial service applications. The design of the body and seat assures non-clogging shut off on suspended solids in industries.
The DN150 PN10 unidirectional knife gate valve features a single piece, stainless steel body design provides tested performance in applications ranging from general purpose to severe media.
The lug type knife gate valve is designed per MSS-SP-81.Made by stainless steel CF8, the 4 inch gate valve has 150 LB flange connection and handwheel operation.
The DN80 PN16 cast iron gate valve has face to face dimension as per DIN3202 F4 or DIN3202 F5. This GG25 gate valve is designed with resilient seat, non rising stem, bb, RF flange, suitable for water treatment application. Quick Detail Type Gate Valve Nominal Diameter DN 80 Nominal Pressure PN 16 ConstructionType Non-rising stem, Bolted Bonnet, Resilient Seat ConnectionType Flanged OperationType Handwheel Operation Body Material Cast Iron GG25 TrimMaterial Cast Iron Wedge, SS420 Stem, EPDM Seat Design Code DIN 3352 End to End Code DIN 3202 Flange Dimesion DIN 2501 Medium Water Origin China Design Feature 1.Resilient seat for good sealing performance 2.Low flow resistance and small pressure drop 3.Non-rising stem for installation space is limited 4.No limitation for flow direction of medium 5.Epoxy painting available for internal and external part of the valve for anti corrosive function Company Brief Introduction Specializing in valve industry over 10 years, Dervos becomes the leading vendor of gate, globe, check, ball, butterfly, plug valves and strainers. We serve oil and gas user such as LUKOIL, MOL, YPF with local partners. Dervos show its advantages in: 1. Our partnerships with tens of stable suppliers allow us to provide customers with a wide range of high-quality products at a competitive price. 2. Each order is under strict quality control with inspection reports before delivery. 3. We value delivery time as much as our customers do. With the powerful purchasing system, we follow each order closely to secure on-time delivery. 4. One-stop solutions will be offered in a timely manner
10" 300LB ball valve is made according to API 6D standard. The valve body is made of ASTM A216 WCB. It has the structural characteristics of full bore, fixed ball, anti-fire, anti-static, and anti-flying valve stem design. Its connection mode is RF. And it has turbine operation mode.
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
DN250 PN40 Y-type strainer is made according to EN13709 standard. The valve body is made of EN 10213 1.0619. It has the structural characteristics of Y-type. It connection mode is RF.
DN20 800LB PN130 Forged Steel A105 SW Connection Way BB OS&Y Handwheel Operation Gate Valve Body and Bonnet A105 API600 Trim 8 Seat 410+STL Wedge 420 Stem 410 Gasket 304+Graphite Design and Manufacture API602 Face to Face ANSI B16.11 Welded end Dimensions API 602 Test and Inspection API 508. Quick Detail Type Gate Valve Size DN20 Pressure 800LB Construction BB,OS&Y Connection SW Operation Mode Handwheel Body Material A105 Cover A105 Design & Manufacture API 602 End Connection API 602 Inspection API 598 Temperature Range -29℃~+425℃ Medium Oil, Water, Gas
The DN32 JIS 5K globe valve is suitable for marine application. The bronze globe valve is handwheel operated with FF flange. Quick Detail Type Marine Globe Valve Size DN 32 Design Pressure 5K Connection Type FF Flange Design Code JIS F7301 Face to Face JIS B2002 Body Material Bronze Trim Material Bronze Application Water, Oil, Gas Purchasing System Late delivery time become a common issue in 2018. However, Dervos keep more than 90% on-time delivery, so how do we achieve that? It owns our purchasing department. How do we react to a delay crisis? -Visit the factory everyday and supervise on site -Initiate related resources, such as machining workshops and skilled workers to help on expediting production What benefits could we do for you by keeping on-time delivery? -Avoid penalty from end user -Accumulate reputation -Gain client’s trust FAQ 1. Do you have your own foundry or forge shop? No, but we have an approved list of foundries over the past decade of casting inspections, which can make sure that our castings are of good quality and all the raw materials are traceable. 2. Can you do NDE Capability radiography, MT, UT, LP? Of course, we can do all these tests upon our clients, but there will be additional charge to these tests. 3. What kind of test will you do for each order? After valve assembly, we will do hydraulic test for shell & sealing and air test. Plus, we will do dimension checking (face to face dimension, flange dimension) as per assembly drawing and standards.
2" 1500LB ball valve is made according to API 6D standard. It also complies with the design standard of NACE MR0175. The valve body is made of ASTM-A105. It has the structural characteristics of full flow and trunnion mounted ball. It has RTJ connection mode and gearbox operation mode.
The 8 inch plug valve is designed per API 6D with Class 150 RF flange and gearbox operation. The inverted plug valve is made of LCB. Dervos could offer customizing service by providing clients with valves in different sizes, materials, standards, design pressure, structure, operation type and connection type. Quick Detail Type Plug Valve Size 8'' Design Pressure 600LB Construction Inverted Type, Lubricated Type, Pressure Balanced Connection RF Flange Operation Gearbox Design Code API 6D Face to Face ANSI B16.10 End Connection ANSI B16.5 Test & Inspection API 598 Body Material LCB Temperature Range -46℃~+425℃ Application Water, Oil and Gas Dimension
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