1. Definition and Application
Mining valves are fluid control devices designed specifically for mining environments. They are used to regulate, shut off, or transport water, slurry, gas (such as methane), and other corrosive media in mine pipelines. Key requirements include explosion-proofing, high-pressure resistance, and corrosion resistance.
2. Common Types
n Mining Gate Valves: Used to shut off fluids, they are resistant to high pressure and offer excellent sealing properties. They are suitable for main drainage systems.
n Mining Globe Valves: Regulate flow, feature a simple structure, and are easy to maintain. They are commonly found in ventilation systems.
n Mining Ball Valves: Provide fast opening and closing, are wear-resistant, and are suitable for slurry transport in high-dust environments.
n Mining Butterfly Valves: Lightweight and low-cost, they are used in high-flow, low-pressure pipelines (such as ventilation systems).
n Mining Safety Valves: Prevent pipeline overpressure and ensure equipment safety (such as in gas extraction systems).
n Mining Check Valves: Prevent backflow of fluids. They are used in drainage and grouting pipelines.
3. Core Features
n Explosion-proof design: Complies with coal mine safety standards (e.g., GB3836) to prevent gas explosions caused by sparks.
n Corrosion-resistant materials: The valve body is typically made of stainless steel, ductile iron, or rubber-lined, suitable for acidic water or corrosive media.
n High-pressure tolerance: Pressure resistance can reach over 10 MPa, suitable for deep-mine operations.
n Sealing: Metal hard seals or rubber soft seals prevent leakage.
4. Applications
Coal mine underground drainage systems, gas extraction pipelines, ventilation systems, grouting and fire extinguishing pipelines, etc.
5. Selection Considerations
n Media type (corrosiveness, particulate matter content);
n Operating pressure and temperature;
n Explosion-proof rating (e.g., Exd I Mb);
n Installation space limitations (e.g., butterfly valves are suitable for narrow spaces).
