Coal mine valve

Coal mine valves are special valves designed specifically for special working conditions underground in coal mines, and must meet strict requirements such as explosion-proof, wear-resistant, and corrosion-resistant.

The following is a summary of coal mine valve information:
1、 Core types and characteristics
Mining electric gate valve
Adopting explosion-proof electric actuators that comply with MA coal safety certification and are suitable for gas environments
Typical models such as ZDYF mining explosion-proof electric hydraulic control gate valve, supporting remote control
Mining electric ball valve
Floating ball structure, available in cast steel/stainless steel materials, suitable for water, steam, and corrosive media
Explosion proof grade up to ExdI, working pressure 0.6-16.0MPa, temperature range -20 ℃~+425 ℃
Knife gate valve (suitable for coal slurry transportation)
Thin blade gate design, capable of cutting off fiber impurities, U-shaped seal enhances leak prevention capability
Compared to ordinary gate valves, it is more suitable for high viscosity media containing particles
2、 Key parameters for selection
Sealing performance: Bidirectional hard sealed butterfly valve can achieve ISO 5208 Class V zero leakage
Drive mode: mainly electric/pneumatic, hydraulic gate valve needs to be matched with hydraulic station and maintenance is complex
Environmental adaptation: Explosion proof certification (such as MA, ATEX) is required, and the material must be resistant to hydrogen sulfide corrosion
3、 Typical application scenarios
Gas extraction system: Explosion proof electric ball valve controls gas flow direction
Drainage pipeline: Hydraulic gate valve is used for high-pressure coal water slurry discharge
Dust removal device: Bidirectional hard sealed butterfly valve for processing dusty gases
Note: Actual selection should be based on specific working conditions, pressure, medium characteristics, and safety regulations requirements
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