In the export of industrial valves, packaging is often regarded as merely the final step before delivery. However, during actual transportation, packaging directly affects the overall condition of the valve during transit, handling, and even at the moment the customer unpacks it. For industrial valves that must undergo long-distance transportation and multiple transshipments, packaging itself is an integral part of product quality. Based on extensive export experience, DERVOS has established a clear, stable, and repeatable valve packaging standard to ensure that valves are delivered to customers safely and in perfect condition. 1. Pre-Packaging Preparation and Product Verification Before entering the packaging process, all valves undergo cleaning, inspection, and product information verification. This stage ensures that each valve is in a stable and fully controlled condition before packaging. ● Remove oil and grease from the valve body surface ● Inspect flange sealing surfaces and the valve cavity to ensure no foreign matter is present ● Install and securely fix the nameplate to ensure product information is clear and identifiable This process provides a reliable foundation for subsequent protection and transportation. 2. Internal Anti-Corrosion Treatment and Sealing Surface Protection To address the conditions typically encountered during export transportation, valves receive targeted protective treatment prior to packaging: ● The valve cavity is evenly coated with anti-rust oil to reduce the risk of corrosion in humid or salt-laden environments ● Protective covers are installed on all flange faces to prevent impact damage or contamination during handling and transport These measures ensure that both internal components and sealing surfaces remain in good condition until the valves arrive at the customer's site. 3. Multi-Layer Inner Packaging and Individual Valve Protection During the inner packaging stage, DERVOS applies a multi-layer cushioning structure to provide comprehensive protection for each valve: ● Impact-resistant pearl cotton is placed around all sides and at the bottom of the inner carton ● Separators are installed between valves to prevent direct contact ● Each valve is individually wrapped with protective cushioning material, with special attention given to coatings and machined surfaces This packaging structure effectively reduces the risk of paint damage, abrasion, and surface defects during transportation. 4. Custom Partition Fixing and User-Friendly Design When multiple valves are packed in the same crate, custom wooden partitions are used to secure each unit: ● Valves are precisely positioned according to their dimensions to prevent movement inside the crate ● Partitions feature chamfered edges, making it easier for customers to open the crate and remove the valves ●&nb...
In industrial piping systems, globe valves and gate valves are two of the most commonly used shutdown valves. Although both are designed for starting and stopping fluid flow, they differ significantly in structural design, operating principles, application scenarios, and overall performance. Understanding these differences helps engineers make informed selections that ensure system efficiency, reliability, and cost-effectiveness. I. Key Differences in Structure and Operating Principles 1. Different opening and closing mechanisms Globe Valve: The disc moves up and down along a path perpendicular to the flow direction. Shutoff is achieved when the disc and seat sealing surfaces come into full contact. Gate Valve: The gate moves vertically in a manner similar to a “gate” that is either fully open or fully closed, with sealing achieved through surface compression. This means that globe valves are suitable for precise throttling, while gate valves are mainly used for full open or full shut service. 2. Flow path design differences A globe valve has an S-shaped flow path that forces the medium to change direction, resulting in higher flow resistance. A gate valve features a straight-through flow path with minimal resistance and low pressure drop, making it better suited for long-distance transmission. II. Differences in Application Scenarios 1. Throttling vs. On/Off Service Globe valves can be used for throttling and flow regulation, making them suitable for applications requiring high sealing performance and precise flow control, such as steam, cooling water, and various process media. Gate valves are not suitable for throttling, as operating them in a partially open position may cause gate vibration, damage to the sealing surfaces, and fluid-induced impact. Gate valves are ideal for large-diameter pipelines where low flow resistance is required and switching frequency is relatively low, including oil transportation, water supply and drainage, and power plant systems. 2. Size range and installation space Globe valves are generally used in small to medium sizes (more common below DN50). Their body structure is heavier and requires more installation space. Gate valves are suitable for medium to large sizes. Due to their simpler design, they offer a cost advantage in larger dimensions. III. Sealing Performance and Pressure Ratings 1. Differences in sealing surface design The globe valve features a tapered sealing surface, which achieves tight shutoff through axial compression, making it easier to obtain reliable sealing performance. The gate valve uses either parallel or wedge-type sealing surfaces. Its sealing effectiveness depends largely on the pressure applied by the gate and is more influenced by the system’s medium pressure. 2. Pressure and temperature adaptability Both valve types are suitable for medium- to high-pressure and high-temperature applications....
Butterfly valves are widely used in industrial piping systems due to their compact structure, lightweight design, and quick operation. They are commonly applied in water treatment, chemical, power, oil, and gas industries. However, when dealing with industrial standards across different countries and regions, selecting a butterfly valve that meets the relevant specifications is crucial. This article provides a detailed analysis of butterfly valve design and selection requirements based on three key standards: API 609, ISO 5752, and GB/T 12238. 1. API 609 — American Petroleum Institute Standard API 609 is the American Petroleum Institute (API) standard for metal-seated butterfly valves, primarily used in the oil, gas, and chemical industries. The standard defines valve structure, materials, dimensions, and pressure ratings to ensure reliable performance under high temperature, high pressure, and corrosive media conditions. Key points include: ● Pressure Ratings: Covers Class 150 to 1500, accommodating various service conditions. ● Body and Disc Design: Metal-to-metal sealing requires precise alignment between disc and seat to prevent leakage under high temperature or high pressure. ● Testing and Inspection: Includes shell tests, seat leakage tests, and operational performance checks to ensure valve safety and reliability. For high-temperature steam or high-pressure oil and gas pipelines, selecting a butterfly valve compliant with API 609 can significantly reduce leakage risk and extend equipment lifespan. 2. ISO 5752 — International Standard Organization Standard ISO 5752 is the International Organization for Standardization (ISO) standard that specifies end dimensions and flange connection sizes for valves. It defines the face-to-face dimensions, flange sizes, and connection methods for butterfly valves, providing a consistent interface specification for industrial users worldwide. Key points include: ● Face-to-Face Dimensions: Specifies valve lengths for different nominal diameters to ensure compatibility with piping systems. ● Flange Dimensions: Ensures valves match international standard pipe fittings, such as ANSI or DIN flanges. ● Interchangeability: Butterfly valves designed according to ISO 5752 can be replaced or serviced globally without redesigning the pipeline interface. ISO 5752 is particularly suitable for multinational engineering projects, ensuring the universality of butterfly valves across different plants and systems. 3. JB/T8527 — Chinese National Standard JB/T8527 is the Chinese national standard specifying the dimensions, structure, and testing requirements for metal hard-seal butterfly valves. It is widely applied in domestic industrial projects such as water conservancy, power, and petrochemical industries, serving as an important reference for procurement and acceptance. Key ...
2" 150LB gate valve is made according to API 600 standard. The valve body is made of A351 CF3. It has the structural characteristics of bolt cover, rising stem bracket. Its connection mode is RF. And it has handwheel operation mode.
Payment:
30% when order confirmed, 70% before shipmentProduct Origin:
ChinaColor:
CustomizationShipping Port:
Shanghai, ChinaLead Time:
30~60 days Ex Works after order confirmationMaterial:
A351 CF3Method of Operation:
HandwheelProduct Description
|
Type |
Gate Valve |
|
Size |
2" |
|
Pressure |
150LB |
|
Connection |
RF |
|
Operation |
Handwheel |
|
Body Material |
A351 CF3 |
|
Design Norm |
API 600 |
|
Face to Face Dimension |
ASME B16.10 |
|
End Connection |
ASME B16.5 RF |
|
Test & Inspection Code |
API 598 |
|
Temperature |
-29 ~ 425 °C |
|
Applicable Medium |
Water, Oil and Gas |
Features
1. Compact structure, simple structure, compact appearance, easy assembly, and reliable operation;
2. Flexible switch, easy to open and close operation.
Technical Drawing
Dimension Checking
Pressure Testing
Nameplate & Packing
Inspection report
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The stainless steel CF8M gate valve is designed with flange connection and handwheel operation per DIN 3352. The PN16 DN200 full port gate valve has OS&Y structure, resilient wedge and replaceable seat. Design Specifications Design and Manufacture: DIN 3352 End to End Dimension: DIN3202 Flange End: EN1092-1 Test & Inspection: EN12266-1/2 Design Feature -Full Bore Design -Superior flow rates & small friction loss -Low torque value for closing and opening the valve -Flexible wedge for better seating and ease of operation -Smooth finish and superior sealing for seat face -Every valve is manufactured with specific number on body for traceability Quick Detail Type Gate Valve Size DN 200 Pressure PN 16 Construction Bolted Bonnet, Rising Stem, Outside Screw and Yoke Connection Flange Connection Operation Handwheel Body Material Stainless Steel CF8M TrimMaterial Stainless Steel Temperature Range -268℃~+648℃ Medium Water, Oil and Gas Origin China Dervos Packaging Packaging is an important part we could never neglect. Dervos has a packaging process for each order to ensure a safe and clear delivery of the order.
4" 150LB gate valve is made according to API 603 standard. The valve body is made of ASTM A351 CF8M+STL. It has the structural characteristics of bolt cover, elastic wedge and rising stem. Its test and inspection conform to API 598, and its operation mode is handwheel operation.
DN200 PN40 gate valve is made according to EN1984 standard. The valve body is made of 1.4571+STL. It has the structural characteristics of bolt cover, elastic gate, rising stem and bracket. Its connection mode is EN1092-1/B. And it has hand wheel operation mode.
DN125 PN16 gate valve is made according to DIN 3352 standard. The valve body is made of 1.4408. It has the structural characteristics of bolt cover, rising stem, elastic wedge, with SS316 insulation jacket and structural length of 325mm. Its connection mode is RF EN1092-1 B1. And it has hand wheel operation mode.
DN100 PN40 5A Duplex Stainless Steel Gate Valve is made according to EN 1984 standard. The valve body is made of ASTM A995 5A+STL. It has the structural characteristics of Full Bore, Bolted Bonnet, Rising Stem with Yoke, Flexible Wedge. Its connection mode is EN1092-1 B1. And it has hand wheel operation mode.
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
DN150 PN25 ball valve is made according to ISO 17292 standard. The valve body is made of ASTM A105. It has the structural characteristics of fixed ball and full bore. Its connection mode is EN 1092-1 B1. And it has turbine operation mode.
DN250 PN10 butterfly valve is made according to EN593 standard. The valve body is made of ASTM A216 WCB. It has the structural characteristics of three eccentricities, bidirectional one to one pressure test. Its connection mode is wafer. And it has turbine operation mode.
The 6 Inch PSB globe valve has 1500LB design pressure, butt weld end, and gearbox. The full bore globe valve is made of carbon steel WCB body and trim 5 material. Quick Detail Type Globe Valve Size 6'' Design Pressure Class 1500 Construction Pressure Seal Bonnet, Plug Type Disc, Rising Stem Connection Type Butt Weld Operation Type Bevel Gearbox Opearted Design Code BS 1873 End to End ASME B16.10 Connection End ASME B16.25 Pressure & Temperature ASME B16.34 Test & Inspection Standard API 598 Body Material Cast Steel WCB Trim Material Trim NO. 5 Temperature Range -29℃~+425℃ Application WOG Origin China Material & Dimension NPS DN Class 2 2 1/2 3 4 6 8 50 65 80 100 150 200 L(RF) L1(BW) 900LB 368 419 381 457 610 737 1500LB 368 419 470 546 705 832 2500LB 451 508 578 673 917 1022 L2(RTJ) 900LB 371 422 384 460 613 740 1500LB 371 422 473 549 711 841 2500LB 454 514 584 683 927 1038 H(Opne) 900LB 550 605 678 798 930 1230 1500LB 550 605 866 956 1260 1263 2500LB 560 720 755 1230 1791 2086 W 900LB 350 350 400 450 458 610* 1500LB 400 400 450 560 610* 610* 2500LB 400 450 560 310* 610* 760 Weight (RF) 900LB 78 108 102 142 400 960 1500LB 85 110 135 230 660 1590 2500LB 140 168 247 620 1500 3200 Weight (BW) 900LB 66 91 87 128 355 868 1500LB 77 101 122 209 595 1440 2500LB 100 118 180 438 1148 2594 *Manual gear operator is recommended 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 Seat Ring A105 A182 F11 A182 F22 A182 F5 A182 F304 A182 F316 A182 F304L A182 F316L 3 Disc A105 A182 F11 A182 F22 A182 F5 A182 F304 A182 F316 A182 F304L A182 F316L 4 Stem A182 F6 A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 5 Disc nut A182 F6 A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 6 Cap SS Spiral Wound graphite or SS Spiral Wound PTFE 7 Body Seal Flexible Graphite+316 8 Adjustment Gasket F6 F6 F316 9 Stem packing Flexible Graphite+316 10 Gland Nut A194 2H A194 8 11 Gland Eyebolt A193 B7 A193 B8 12 Pin Carbon steel or Stainless Steel 13 Cap Nut Carbon steel or Stainless Steel 14 Gland A182 F6 A182 F304 A182 F316 A182 F304L A182 F316L 15 Gland Flange A216 WCB A351 CF8 16 Yoke A216 WCB A351 CF8 17 Stem Nut A439 D2 or B148-952A 18 Screw Carbon steel 19 Handwheel Ductile Iron or carbon steel 20 Name Plate Stainless steel or Aluminum 21 Washer Carbon steel 22 Nut Carbon steel or Stainless Steel Related Knowledge Why do we use pressure seal bonnet? Pressure sealed bonnet are often used for valves with high design pressure. The higher the internal pressure gets, the greater the sealing force beween body and bonnet become. For bolted bonnet valves, the body and bonnet are joined by studs and nuts with a gasket between the flange faces to facilitate sealing. However,as system pressure increases,the potential for leakage through the body and bonnet increases. But for pressure sealed valve, “bonnet take-up bolts” to pull the bonnet up and seal against the pressure seal gasket. That is why when pressure increase, the performance of pressure seal gasket between body and bonnet becomes better.
16" 900LB ball valve is made according to API 6D standard. The valve body is made of A350 LF2. It has the structural characteristics of fully welded, fixed ball and full bore. Its connection mode is BW. And it has turbine operation mode.
The 2 piece type floating ball valve has full port, fire safe design, anti blowout stem, ANSI 150 flange and lever operation. The carbon steel ball valve is designed with A216 WCB body, F316 stem and ball, PTFE soft seat. Quick Detail Type Ball Valve Size 4" Pressure 150 LB Construction Floating Type Ball, Two Piece Body, Full Bore Connection Raised Face Flange End Operation Wrench Operation Body Material Cast Steel WCB Trim Material SS316 &PTFE Design Standard API 6D Pressure & Temp Code ASME B16.34 Face to Face ASME B16.10 End Connection ASME B16.5 Inspection Code API 6D Temperature Range -29℃~+125℃ Media Water, oil and gas Material & Dimension No Part Name Carbon steel to ASTM Stainless Steel to ASTM WCB LCB CF8 CF8M CF3 CF3M 1 Body A216 WCB A352 LCB A351 CF8 A351 CF8M A351 CF3 A351 CF3M 2 Bonnet nut A194 2H A194 4 A194 8 3 Bonnet bolt A193 B7 A320 L7 A193 B8 4 Cap A216 WCB A352 LCB A351 CF8 A351 CF8M A351 CF3 A351 CF3M 5 Gasket SS Spiral Wound/graphite or SS Spiral Wound/PTFE 6 Ball A105/Ep.Cr or F6 A182 F6 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 7 Seat Ring RPTFE or POM 8 Small spring Stainless Steel 9 Small ball A182 F304 A182 F316L 10 Stem A182 F6 A182 F6 A182 F304 A182 F316 A182 F304L A182 F316L 11 Stem Seat PTFE 12 Stem Packing PTFE or Graphite 13 Gland A182 F6 A182 F304 A182 F316 A182 F304L A182 F316L 14 Gland Bolt A193 B7 A193 B8 15 Galnd Flange A216 WCB A351 CF8 16 Positioning Plate Steel 17 Wrentch A216 WCB The material is according to ASTM standard CLASS 150 DN mm 15 20 25 40 50 65 80 100 150 200 250 NPS in 0.5 0.75 1 1.5 2 2.5 3 4 6 8 10 L (RF) mm 108 117 127 165 178 191 203 229 394 457 533 in 4.25 4.6 5 6.5 7 7.5 8 9 15.5 18 21 L1 (BW) mm 140 152 165 190 216 241 283 305 457 521 559 in 5.5 6 6.5 7.48 8.5 9.5 11.13 12 18 20.5 22 L2 (RTJ) mm 119 129.7 139.7 178 191 203 216 241 406 470 546 in 4.69 5.11 5.5 6.9 7.5 8 8.5 9.5 16 18.5 21.5 H mm 66 74 87 105 132 152 182 215 250 285 495 in 2.6 2.9 3.48 4.2 5.28 6.08 7.28 8.6 10 11.4 19.5 Do(W) mm 130 130 160 230 400 400 600 850 1100 1500 *350 in 5.1 5.11 6.3 9 15.74 15.74 23.62 33.46 43.3 59 13.8 RF(Kg) 2.3 3 4.5 7 15 20 25 40 97 160 240 BW(Kg) 2.0 2.5 3.8 5.8 12 17 21 36 92.8 154 227 *Worm Gear or Electric actuator operated Special Tests & Inspections In addition to regular hydraulic testing and air testing, Dervos could also do specials test as per clients’ requests, such as PT test, RT test, UT test, cryogenic test, low leakage test, fire proof test, and hardness test and so on.
3" 1500LB strainer is made according to ASME B16.34 standard. The valve body is made of ASTM A216 WCB. It has the structural characteristics of plug with DN20 blind flange. Its connection mode is RTJ.
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