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The Uses of Steel Gate Valves
Steel gate valves are primarily used for full shut-off/isolation in high-pressure, high-temperature, and heavy-duty industrial systems; they are not designed for throttling. Below are their key applications by industry:
1. Oil & Gas Industry
Pipelines: Mainline block valves for crude oil, natural gas, and refined products (e.g., long‑distance transmission lines).
Refineries & Petrochemicals: Control hot hydrocarbons, process fluids, and high‑pressure gases.
Storage & Offshore: Emergency shut‑off for tanks, platforms, and subsea systems.
2. Power Generation
Thermal & Nuclear Plants: High‑temperature/high‑pressure steam lines, boiler feedwater, and reactor coolant systems.
Hydroelectric: Isolation for large‑volume water conduits.
District Heating: Hot water and steam distribution networks.
3. Chemical & Process Industries
Chemical Plants: Corrosive acids, solvents, and aggressive process media (stainless steel grades).
Pharmaceuticals & Food: Sanitary, clean‑in‑place (CIP) systems (316L stainless steel).
4. Water & Wastewater
Municipal Water Supply: Large‑diameter trunk lines, pumping stations, and treatment plants.
Wastewater & Sludge: Knife‑edge gate valves for slurries and high‑solids content.
Irrigation & Desalination: Seawater and brackish water systems.
5. Mining, Metals & Heavy Industry
Mining & Minerals: Slurry transport, ore processing, and tailings lines.
Steel & Metals: High‑temperature gas and cooling water for furnaces and rolling mills.
6. Marine & Offshore
Shipbuilding & FPSOs: Seawater, fuel, and ballast systems; resistant to saltwater corrosion.
7. Specialized Applications
LNG & Cryogenics: Low‑temperature service (‑162°C) with austenitic stainless steel.
Hydrogen: High‑pressure hydrogen storage and transport (anti‑hydrogen‑embrittlement alloys).
Fire Protection: Main water supply isolation for industrial and commercial fire systems.
Key Advantages for These Uses
Low flow resistance when fully open.
Tight shut‑off for critical isolation.
High pressure/temperature rating (cast/forged steel).
Wide size range (DN15 to DN1200+).
Durable in harsh environments.
Limitation
Not for throttling/flow control (use globe or control valves instead).
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