Views: 0 Author: J-VALVES Publish Time: 2025-05-20 Origin: Site
I. ANALYSIS OF WORKING CONDITIONS AND SELECTION PRINCIPLES
1. Working Pressure and Temperature
The pressure and temperature requirements under different working conditions determine the selection of GATE VALVES. For example, in high-pressure and high-temperature environments, materials that are resistant to high temperatures and have high strength, such as chromium-molybdenum steel (e.g., ZGCrMoV9) or alloy steel (e.g., ASTM A217 WC6/WC9), should be selected; while under low-pressure and normal-temperature conditions, common carbon steel or cast iron materials can be chosen.
2. Medium Characteristics
The corrosiveness, viscosity, and abrasiveness of the medium are important bases for selection. For corrosive media (such as sulfuric acid, seawater), stainless steel (e.g., CF8/CF316L) or acid and alkali-resistant materials are recommended; for non-corrosive media (such as water, oil), economical cast iron or carbon steel materials can be selected.
3. Sealing Performance Requirements
Metal sealing structures are suitable for high-temperature and high-pressure working conditions (such as graphite spiral wound gaskets or hard alloy seals). Enhanced polytetrafluoroethylene (PTFE) sealing rings or metal sealing structures should be selected.
4. Installation Space and Connection Methods
Select the appropriate valve structure form according to the installation space and connection methods (such as flange connection, wafer connection). For example, parallel GATE VALVES are suitable for low-pressure and large-diameter pipelines, while wedge GATE VALVES are more suitable for high-pressure or working conditions that require higher sealing performance.
Material Type | Applicable Medium | Temperature Range (°C) | Corrosion Resistance | Cost Index | Recommended Industry |
WCB Carbon Steel | Water, Steam, Oil Products | -29 - 425 | ★★☆☆☆ | Low | Conventional Petrochemical, Power Generation |
CF8 Stainless Steel | Weak Acid and Alkali Solutions | -196 - 537 | ★★★★☆ | Medium | Food, Pharmaceutical |
Duplex Steel 2205 | Chloride Ion-Containing Solutions, Seawater | -40 - 300 | ★★★★★ | High | Marine Engineering, Chemical Fiber |
Hastelloy C276 | Strong Acids (Sulfuric Acid / Hydrochloric Acid) | -198 - 400 | ★★★★★ | Extremely High | Special Chemical, Electroplating |
Titanium Alloy Gr.2 | Wet Chlorine, Chlorides | -196 - 300 | ★★★★☆ | High | Chlor-alkali Industry |
Lined with PTFE | Highly Corrosive Fluids | -50 - 150 | ★★★★★ | Medium | Acid Pickling Production Line |
Monel 400 | Hydrofluoric Acid, High-Temperature Alkali Liquor | -130 - 480 | ★★★★☆ | High | Nuclear Industry, Fluorine Chemical Industry |
Pressure Rating (Class) | Maximum Working Pressure (psi) | Applicable Pipeline Type | Typical Application Scenarios | Material Thickness Increase |
150 | 285 | Low-Pressure Steam / Circulating Water | HVAC Systems, Irrigation Pipe Networks | +0% |
300 | 740 | Conventional Chemical Pipelines | Atmospheric and Vacuum Distillation Units in Refineries | +20% |
600 | 1480 | High-Pressure Steam System | Main Steam Pipelines in Power Plants | +45% |
900 | 2220 | Supercritical Fluids | Geothermal Power Generation, Ammonia Synthesis Plants | +70% |
1500 | 3705 | Extreme High-Pressure Working Conditions | Deep-Sea Oil Extraction | +120% |
III. PRECAUTIONS FOR SELECTION
1. Comprehensively Consider Working Condition Parameters
When selecting, it is necessary to comprehensively consider factors such as pressure, temperature, medium characteristics, and sealing requirements to avoid selection errors caused by a single parameter.
2. Follow Relevant Standards
The design of J-VALVES GATE VALVES complies with international standards such as API 600, API 602, and BS 5351 to ensure reliable product performance.
3. Regular Maintenance and Inspection
To ensure the long-term and stable operation of the valve, it is necessary to regularly check the sealing surfaces, lubricated parts, and the flexibility of valve operation.
4. Consult Professional Engineers
For metal-sealed valves, it is necessary to regularly check the wear of the sealing surfaces and avoid scratches by hard objects. It is recommended to consult the technical support team of J-VALVES Company to obtain customized solutions.
IV. CONCLUSION
With its diverse material and pressure rating designs, J-VALVES GATE VALVES can meet the needs of different working conditions. Through the above table comparison and selection principles, users can quickly find the gate valve model suitable for their own needs. Meanwhile, following relevant standards and combining with actual working conditions for selection will effectively improve the operation efficiency and safety of the system.
