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.
The DN100 through conduit slate gate valve is made according to EN558.It is ideal for pipeline applications requiring pigging capability.
Payment:
30% when order confirmed, 70% before shipmentProduct Origin:
ChinaColor:
CustomizationShipping Port:
Shanghai, ChinaLead Time:
30~60 days Ex Works after order confirmationMaterial:
A516Method of Operation:
HandwheelQuick Detail
|
Type |
Gate Valve |
|
Nominal Diameter |
DN100 |
|
NominalPressure |
PN63 |
|
Construction |
Slab type;Through Conduit |
|
Connection |
D Type Flange |
|
Design & Manufacture |
EN558 |
|
End to End Dimension |
EN558.1 |
|
Flange Dimension |
EN1092-1 D |
|
Test & Inspection |
API598 |
|
Body Material |
A516 |
|
Disc Material |
A516 |
|
Seat Material |
A105+ENP+RPTFE |
|
Temp. Range |
-29～121℃ |
|
Media |
Water, Steam, Oil, etc |
Through conduit plate gate valves are the oil and gas industry's choice for liquid and gas applications where reliable, tight shutoff is required to prevent leakage and minimize loss of process contamination.
Features
-Fire-safe Level:Mk
-Temp. Level :T3，
-Leakage Level：EN12266A
-Back Seat
-Primary metal-secondary soft seat
-Changeable packing stuff
Technical Drawing
Witness Tests
Packing
Special Tests
Besides general tests we will do (hydraulic and air test), we could also do tensile strength test, metallographic test,fugitive emission test, andNDE test (UT,RT,PT,MT) upon customers’ specific requests.
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 through conduit slab gate valve, designed as per DIN standard, has the diversion hole for pipeline cleaning. The PN64 parallel disc gate valve is made of carbon steel with RF flange and handwheel. Quick Detail Type Parallel Slab Gate Valve Nominal Diameter DN 200 Nominal Pressure PN 64 Construction Parallel Slabe Gate Valve, With Diversion Hole, Bolted Bonnet, Resilient Seat Connection Flange Operation Handwheel Operation Body Material Carbon Steel Medium Water, Oil and Gas Origin China Design Feature 1.Parellel disc 2.Soft seat and metal seat for choices 3.Full bore design for pigging and less pressure drop 4.Firesafe design 5.Self relieving function 6.Grease fitting for seat and stem 7.Double block and bleed capability 8.With vent and drain port 9.Tight sealing performance Material Part Name Material Body & Bonnet A216 WCB, CF8, CF8M, CF3, CF3M Wedge Alloy Steel (face harden treated), Stainless Steel (with Co overlay) Stem Alloy Steel (face erosion-resistant treated) Seat Alloy Steel (face harden treated, beset F plastic), Steel (with Co overlay, best F plastic) Packing PTFE O-Ring NBR, FEP Sealing Grease
The API 6D through conduit gate valve is designed with double expanding wedges, metal to metal seat and diversion hole for pigging. The valve has good performance on sealing, less flow resistance and is suitable for application with some solids or particles. Quick Detail Type Gate Valve Size 18'' Design Pressure ANSI 600 Construction Double Expanding Wedges, Fully Metal Seat, With Diversion Hole ConnectionType RTJ Flange OperationType Gearbox Operated Body Material WCB WedgeMaterial A105+STL+ENP StemMaterial 17-4PH SeatMaterial A105+STL+ENP Design Code API 6D Face to Face Dimension ASME B16.10 End Connection ASME B16.5 Pressure & Temp ASME B16.34 Medium Water, Oil and Gas Origin China
The API 6D through conduit gate valve is designed with 600 LB flange and gearbox connection. Made of carbon steel WCB, the 20 inch gate valve has soft seat design without diversion hole.
DN40 PN40 floating ball valve is made according to EN 13709 standard. The valve body is made of A182 F316L. It has the structural characteristics of floating ball. Its connection mode is RF. And it has lever operation mode.
The 16 inch triple offset butterfly valve is designed with metal seat, stainless steel CF8M body, disc and stem. The fully lugged butterfly valve with gearbox has Class 150 design pressure as per API 609. Design Feature 1. Small volume, light weight, simple structure 2. Multi-layer metal seated/fully metal seated 3. Firesafe design 4. Anti-blowout stem 5. Small torque value for operating easily 6. Reliable sealing and could meet zero leakage requirement 7. With function of regulating flow 8. Triple eccentric design for minimized wear of sealing face Quick Detail Type Butterfly Valve Size 16'' Pressure ANS 150 Structure Triple Eccentric, Triple Offset, Metal Seated Connection Type Lug Type Operation Gearbox Operated Design Code API 609 Face to Face ASME B16.10 End Connection ASME B16.5 Test & Inspection API 598 Body Material A351 CF8M Temperature Range -29℃~+425℃ Application Water, Oil, Gas Material No Part Name Carbon steel to ASTM Alloy steel to ASTM Stainless steel to ASTM WCB WC6 WC9 C5 CF8 CF8M CF3 CF3M 1 Body A216 WCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 2 Below Axle Bush PTFE or Stainless Steel and Graphite Spiral Wound 3 Stem A182 F6 A182 F304 A182 F304 A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 4 Seat Ring F6 Stellite 6 Stellite 6 Stellite 6 A182 F304 A182 F316 A182 F304L A182 F316L 5 Butterfly Plate A216 WCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 6 Lock Ring A105 A182 F22 A182 F22 A182 F22 A182 F304 A182 F316 A182 F304L A182 F316L 7 Pin Carbon Steel or Alloy Steel 8 Screw Carbon Steel or Alloy Steel 9 Top Axle Bush PTFE or Stainless Steel and Graphite Spiral Wound 10 Packing Graphite+SS304 11 Bolt A193 B7 A193 B7 A193 B7 A193 B7 A193 B8 A193 B8 A193 B8 A193 B8 12 Nut A194 2H A194 2H A194 2H A194 2H A194 Gr.8 A194 Gr.8 A194 Gr.8 A194 Gr.8 13 Bolt A193 B7 A193 B7 A193 B7 A193 B7 A193 B8 A193 B8 A193 B8 A193 B8 14 Nut A194 2H A194 2H A194 2H A194 2H A194 Gr.8 A194 Gr.8 A194 Gr.8 A194 Gr.8 15 Yoke A216 WCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 16 Gland A182 F6 A182 F304 A182 F304 A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L
Quick Detail Type Globe Valve Designed Size 3/4 Inch Designed Pressure 1500LB Construction Y Type; Bolted Bonnet; Connection Type Socked Weld Operation Handwheel Design Code API602 Connection ANSI B16.11 Test & Inspection API598 Body Material A182 F11+STL Trim Material A276-410+STL Application Water, Oil, Gas Features · Low pressure drop. · Low torque stroking · Quick and easy repair in line. · Tight shutoff. · Stem expansion/contraction thrust unit for high temperature application (optional). · Other sizes available on request. · Live-loading of packing optional. Technical Drawing Dimension Check Witnessing Tests Packing Product Application Dervos valves can be widely used in varieties of industries, such as petrochemical,pipeline,oil & gas,marine,water treatment,power station industries and etc.
6" 150LB Y type strainer is made according to ASME B16.34 standard. The valve body is made of ASTM B148 C95800. It has the structural characteristics of bonnet with 1/2 "FNPT plug. Its connection mode is RF.
The 1 1/2inch 1500LB globe valve,made of one kind of alloy steel F22, is the best answer to working conditions under high pressure and temperature .
The changeover valve is combined by two valves that are different from nominal diameter--one is DN100, the other is DN150. A handwheel is put on the right side of the valve to help control the large WCB-made device. Designed as per DIN 3356, the valve is usually put in the oil industry.
4" 600LB check valve is made according to API 6D standard. The valve body is made of ASTM A216 WCB. It has the structural characteristics of swing type, external pin. Its connection mode is RF.
3/4" 1500LB gate valve is made according to API602 standard. The valve body is made of ASTM A105N. It has the structural characteristics of body cover welding. Its connection mode is SW. And it has handwheel operation mode.
Quick Detail Type Globe Valve DN DN50 PN PN250 Construction Tee Pattern; Bolt Bonnet; Connection Type NPT Operation Type Handwheel Design Code API602 Screw End ASME/ANSI B1.20.1 Test & Inspection API598 Body Material A105+STL Trim Material A276-420 Medium Water, Oil and Gas Origin China Features -- Globe valves have both good throttling and shutoff capabilities -- Easy to maintain and resurface the seats -- Can be used as a stop-check valve if the disc is not attached to the stem Technical Drawing Dimension Check Witnessing Tests Dervos Packaging Good packing means good first impression. Just imagine how do you feel differently when seeing two boxes below? And you will know the reason why in Dervos we value packaging so much. In Dervos, we make sure- Every valve is clean and dry. -Clean the valve before packing -Add anti-rust oil -Add flange cover No damage to valves in delivery. -Fix the valve with iron wire -Separate the valve with soft material -Layer the valve with plywood -Strong box and clear shipping mark
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