Main Classifications
1. By Structure
• Straight-through gate valve: Most commonly used, for straight-line pipeline installation
• Angle gate valve: For 90° turn pipelines, saving bends
• Direct-flow gate valve: Lower flow resistance, suitable for high flow rates
2. By Connection Method: Flange, Threaded, Welded
3. By Actuation Method: Manual, Pneumatic, Electric, Hydraulic
4. Sealing Type: Soft seal (PTFE), Hard seal (Alloy, Stainless Steel)
Core Advantages
• Reliable sealing, highly adaptable to high temperature and high pressure conditions;
• Excellent throttling and pressure reduction functions, suitable for pipelines requiring fine-tuning;
• Slow opening and closing, preventing water hammer impact;
• Simple structure, low failure rate, and low maintenance costs.
Common Materials and Parameters
• Valve Body: WCB carbon steel, 304/316L stainless steel, cast steel, cast iron
• Seal: PTFE, hard alloy, wear-resistant weld overlay
• Pressure: PN16~PN100, Class 150~600
• Temperature: Soft seal: -20℃～180℃ Hard seal: -30℃～425℃
Applicable Industries and Operating Conditions
Widely used for water, steam, oil, gas, and weakly corrosive chemical media:
• Heating and power plant steam pipelines;
• Chemical, petrochemical, and oil refining pipelines;
• Water supply and drainage, HVAC, and fire protection systems;
• Compressed air, heat transfer oil, and hot water pipelines.
