The invention relates to a safety coal gas gate valve for an induced draft fan. The safety coal gas gate valve comprises upper and lower gate valve flanges, an inner gate sealing strip, a gate, flange holes, a front gate valve sealing flange, a front flange sealing strip, and a pull handle, and is characterized in that when the gate valve is opened, the inner gate sealing strip (2) and the front gate valve sealing flange (5) fit closely, and coal gas passes through the flange holes (4), so that the coal gas can not leak out of a valve core; when the gate valve is closed, the front gate valve sealing flange (5) and the front flange sealing strip (6) fit closely, and can be tightly connected by an M8 bolt when necessary, so that the coal gas leakage is effectively prevented, and the gas poisoning of personnel is avoided. The safety coal gas gate valve for the induced draft fan has the advantages of simple manufacturing, low investment cost, convenience in installation and maintenance, safety and reliability in use, and convenience and quickness in opening and closing, and is worth of promoting.

Safety coal gas gate valve for induced draft fan

A flat slide valve for streams of material causing material wear, the housing of which is formed from two identical housing halves joined together along one plane, with a throughflow orifice for the stream of material and with a shut-off plate allocated to the throughflow orifice and arranged and displaceable parallel to the said plane, at least one swirl chamber being arranged underneath the throughflow orifice.

Flat slide valve for streams of material causing material wear

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Flat slide valve for streams of material causing material wear