Explosion proof electric butterfly valve for coal mines

The explosion-proof electric butterfly valve for coal mines adopts explosion-proof design and is mainly used in flammable and explosive environments such as underground coal mines. The shell is made of solid aluminum or 304 stainless steel casting, which meets the GB3836 standard and has an explosion-proof rating of BT4

1Explosion proof electric butterfly valve for coal minesintroduction

Adopting explosion-proof design, mainly used in flammable and explosive environments such as coal mines, it has the following key characteristics:

Explosion proof performance

The shell is made of solid aluminum or 304 stainless steel casting, which meets the GB3836 standard and has an explosion-proof rating of BT4. It can withstand internal explosive pressure ≥ 1.5MPa without failure. The wiring chamber and power chamber adopt a labyrinth isolation structure, and the cable entry device is equipped with a double-layer rubber sealing ring to effectively isolate external sparks. ‌

structural characteristics

Transmission system: using worm gear reduction mechanism, gear set material is 20CrMnTi alloy steel, tooth surface hardness HRC58-62, transmission efficiency>92%

Manual operation: There is an emergency operation hole with a diameter of 12mm on the top, which can be inserted with special tools to manually open and close the valve

Sealing design: The sealing ring is made of stainless steel and combines a dual mechanism of metal hard seal and elastic seal. It is corrosion-resistant and suitable for a temperature range of -29 ℃~300 ℃

IIExplosion proof electric butterfly valve for coal minesTechnical Specifications

Nominal diameter: DN50~1000mm

Medium temperature: -29 ℃~300 ℃

Pressure range: 1.0~1.6MPa

Drive mode: electric or solid-state relay (contactless technology)

This valve has passed coal safety certification and is suitable for coal mine surfaces and non mining working faces. It can cut off or adjust the flow rate of pipelines containing flammable media such as gas. ‌

The main product advantages include:

Explosion proof performance

Adopting a mining explosion-proof design that complies with MA coal safety certification, it is suitable for flammable and explosive environments such as underground coal mines, with an explosion-proof rating of BT4 (the highest explosion-proof rating). ‌

sealing reliability

Double sealing structure: metal hard seal+elastic seal, ensuring good sealing performance in low to high temperature environments.

Sealing material: The valve seat and butterfly plate are made of welded cobalt based hard alloy, which has strong wear resistance and long service life. ‌

Characteristics of the executing mechanism

Explosion proof motor: Fully enclosed squirrel cage motor with built-in overheat protection device, high safety.

Manual operation: It can be manually operated when power is off, and automatically reset when powered on, adapting to emergency situations.

applicability

Medium temperature: Suitable for media with a temperature of ≤ 150 ℃ (such as gas, coal gas, etc.), the bidirectional sealing design is not limited by the flow direction of the medium.

Flexible installation: The drive device supports multitasking