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.
This butch of gate valves are ranged from 3 inches to 32 inches. With non-rising gate valves and solid wedge, which are not regularly found in such big sized valves, these gate valves are quite special and reliable.
Payment:
30% when order confirmed, 70% before shipmentProduct Origin:
ChinaColor:
CustomizationShipping Port:
Shanghai, ChinaLead Time:
30~60 days Ex Works after order confirmationMaterial:
WCBMethod of Operation:
GearboxQuick Detail
|
Type |
Gate Valve |
|
Nominal Diameter |
20 Inch |
|
NominalPressure |
150 LB |
|
Construction |
Non-rising Stem;Solid Wedge |
|
Connection |
Flat Flange |
|
Design & Manufacture |
API 600 |
|
End to End Dimension |
ASME B16.10 |
|
Test & Inspection |
API 598 |
|
Flange Dimension |
ASME B16.5 |
|
Body Material |
WCB |
|
Disc Material |
WCB+13Cr |
|
Seat Material |
A105+13Cr |
|
Temp. Range |
-29℃～180℃ |
|
Media |
W.O.G |
Features
Non-Rising Stem
For a valve of the non Rising Stem type, there is no upward stem movement if the valve is opened. The stem is threaded into the disk. As the handwheel on the stem is rotated, the disk travels up or down the stem on the threads while the stem remains vertically stationary.
Solid Wedge
Solid wedge is the most commonly used disk by its simplicity and strength.
A valve with this type of wedge can be installed in each position and it is suitable for almost all liquids. The solid wedge is a single-piece solid construction, and is practically for turbulent flow.
Advantage
-Good shutoff features
-Gate valves are bidirectional and therefore they can be used in two directions
-Pressure loss through the valve is minimal
Technical Drawing
Witnessing Tests
Packing
Reports
For each order, Dervos will provide inspection reports to show you the whole inspection process and results. Plus, we will provide material report to let you know that the material we provide is as per standards.
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 16 inch cast steel gate valve with gearbox and 600LB RF flange is designed as per API 600. The bolted bonnet gate valve features in rising stem, resilient wedge and metal seat. Quick Detail Type Gate Valve Size 16" Pressure Class600 Construction Bolted Bonnet, Rising Stem, OS&Y, Flexible Wedge, Metal Seat Connection RF Flange Operation Gearbox Design Code API 600 Face to Face ASME B16.10 Flange End ASME B16.5 Pressure & Temp ASME B16.34 Test & Inspection API 598 Body Material A216 WCB TrimMaterial Trim 5 Temperature Range -29℃~+425℃ Medium Water, Oil and Gas Origin China Dimension & Material Class 600 NPS in 2 2 1/2 3 4 6 8 10 12 14 16 18 20 24 DN mm 50 65 80 100 150 200 250 300 350 400 450 500 600 L-L1 (RF-BW) in 11.5 13 14 17 22 26 31 33 35 39 43 47 55 mm 292 330 356 432 559 660 787 838 889 991 1092 1194 1397 L2 (RTJ) in 11.625 13.125 14.125 17.125 22.125 26.125 31.125 33.125 35.125 39.125 43.125 47.25 55.375 mm 295 333 359 435 562 664 791 841 892 994 1095 1200 1407 H (OPEN) in 18.625 21.75 23.375 28 1/16 38 3/16 44 3/16 52.375 59 13/16 68.125 72.25 90.125 98 13/16 119 mm 474 553 593 713 970 1122 1330 1519 1730 1835 2290 2510 3022 W in 9.875 9.875 11 13/16 13.75 19 11/16 22 1/16 28.375 24 24 24 24 30 30 mm 250 250 300 350 500 560 720 610* 610* 610* 610* 760* 760* WT (kg) RF 41 58 88 131 253 413 623 784 1288 1820 2150 2540 4080 BW 35 50 68 104 208 328 496 637 1120 1448 1828 2201 3360 *Manual gear operator is recommended No Part Name Carbon steel to ASTM Alloy steel to ASTM Stainless steel to ASTM WCB LCB WC6 WC9 C5 CF8 CF8M CF3 CF3M 1 Body A216 WCB A350 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 2 Seat Ring A105 A350 LF2 A182 F11 A182 F22 A182 F5 A182 F304 A182 F316 A182 F304L A182 F316L 3 Wedge A216 WCB A350 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 4 Stem A182 F6 A182 F6 A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 5 Bonnet nut A194 2H A194 4 A194 7 A194 8 6 Bonnet bolt A193 B7 A320 L7 A193 B16 A193 B8 7 Gasket SS Spiral Wound graphite or SS Spiral Wound PTFE 8 Bonnet A216 WCB A352 LCB A217 WC6 A217 WC9 A217 C5 A351 CF8 A351 CF8M A351 CF3 A351 CF3M 9 Backseat bushing A182 F6 A182 F6 A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 10 Stem packing Graphite or PTFE 11 Lantern A182 F6 A182 F6 A182 F304 A182 F304 A182 F304 A182 F304 A182 F316 A182 F304L A182 F316L 12 Gland Nut A194 2H A194 8 13 Gland Eyebolt A193 B7 A193 B8 14 PIN Carbon steel or Stainless Steel 15 Gland A182 F6 A182 F304 A182 F316 A182 F304L A182 F316L 16 Gland Flange A216 WCB A351 CF8 17 Stem Nut A439 D2 or B148-952A 18 Nipple Carbon steel or Stainless Steel 19 Retaining Nut Carbon steel 20 Hand Wheel Ductile Iron or carbon steel 21 Name Plate Stainless steel or Aluminum 22 H.W.Lock Nut Carbon steel
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.
Bolt bonnet Gate valve follow EN1984 design standard, raised face flanged connection, outside screw and yoke, handwheel operation, GP240GP body/bonnet/wedge material, F6a stem, metal seal/seated. Quick Detail Type Gate Valve Size DN200 DesignPressure PN40 Construction Bolt Bonnet Gate Valve Connection Type Raised Face Flange Connection Operation Handwheel Design Code EN 1984 Face to Face DIN 3202 End Connection EN 1092-1 Test & Inspection EN 12266-1 Body Material GP240GH Temperature Range -29~425℃ Application WOG
The DN80 PN25 gate valve is designed as per EN 1984. With common parts of a valve, like bolted bonnet, outside yoke and handwheel, its body is made of 1.0619 and 13Cr. Other parts including body, bonnet,seat and others are promised to be traceable. Quick Detail Type Gate Valve Nominal Diameter DN80 NominalPressure PN25 Construction B.B ; OS&Y Connection RF Operation Handwheel Design & Manufacture EN 1984 End to End DIN 3202 Flange End Dimension EN 1092-1 Test & Inspection EN 12266-1 Temperature Range -29℃~+425℃ Body Material 1.0619 +STL Wedge Material 1.0619 +13Cr Media W.O.G. 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
The DN250 PN25 gate valve is designed as per DIN 3352. With common parts of a valve, like bolted bonnet, outside yoke and handwheel, its body is made of WCB and STL. Valve body, bonnet,seat and other parts are promised to be traceable.
This DN50 gate valve is one of the recent batch of our fresh double heating jacketed gate valves whose diameter ranges from DN50 to DN250. The double jacket prevents the valve body from beingcorroded by insulation media.
This DN50 gate valve is one of the recent batch of our fresh heating jacketed gate valves whose diameter ranges from DN50 to DN150.
Dervos is a proud industrial API 600 cast steel gate valve manufacturer in China. Our stainless steel gate valves, carbon steel gate valves, and alloy steel gate valves are available in all trim configurations.
DN400 PN16 gate valve is made according to EN1984 standard. The valve body is made of 1.0619 + STL. It has the structural characteristics of rising stem and structural length of 600mm.
10’’ 300LB gate valve is made according to API 600 standard. The valve body is made of ASTM A217 C5 + STL. It has the structural characteristics of rising stem and bolt cover. The gate valve connected by flange has the operation mode of hand wheel.
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.
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