Air Coal Valves

The Stock Air Coal Valve (ACV) is a double rack and pinion style valve used as a means of isolation below a feeder. The air-tight body provides positive shut-off to minimize hot air and gases from entering the feeder during maintenance. This is accomplished by means of a precision machined gate and inlet surface. The gate is supported on adjustable slide bars located between the gate surface and inlet skirt.

Stock ACV’s are constructed to meet National Fire Protection Agency (NFPA) Code and will withstand a 50 psi explosion. This is a requirement associated with the valve’s application in high pressure environments. Because the Air Coal Valve restricts the flow of hot air and gases in the downstream system, a safe environment is facilitated for workers to carry-out routine maintenance above the valve.

The ACV’s self-cleaning rack and pinion design eliminates the possibility of gate binding. The pinions drive through the gate ladder rack, crushing any material accumulation on the top of the gate rack so that it may pass through. Stock Air Coal Valves have dust-tight bodies to prevent any gas or fine materials from escaping to the outer vacinity of the plant.

The rack and pinion design also allows for valve closure through a standing column of material. This ability is especially beneficial for emergency situations where positive closure is required due to a plugged downspout.