- Gate body & material contact areas constructed from carbon steel.
- Blade & replaceable liners constructed from 304 stainless steel, to address the handled material's reactive qualities.
- The leading edge of the blade is beveled and the standard end seal is replaced with a displacement pocket. With this design, materials remaining at the leading edge of the blade upon gate closure are allowed to fall away into the conveying line below, rather than packing into a true end seal.
- Cam-adjustable rollers constructed from hardened steel.
- On the sides of the gate, milled access slots allow for bonnet seal replacement while the valve remains in-line. As new bonnet seals are driven into the slot, the worn bonnet seals are simultaneously ejected out the other side of the gate.
- Double-acting air cylinder actuator is equipped with a magnetic piston, to be used with magnetic reed switches for gate position indication.
- Special air control solenoids were specified (suitable for -40°F/°C environment) to address Russia's harsh environment.
- Gate is equipped with an Adjustable Variable Positioner (AVP) assembly. The main advantage of the AVP assembly over alternative metering controls is the availability of a greater number of position set points. When a magnetic reed switch is installed on the air cylinder actuator, this switch becomes a position set point. Considering that all four tie rods along the air cylinder actuator can be utilized, the number of possible position set points is significant. Position set points are simply adjusted by repositioning the magnetic reed switch along the tie rod. The AVP also allows metering on both the opening and closing strokes of the blade. Do note: A programmable logic controller (PLC) is required to operate the AVP assembly. Some PLC programming is also required.
Challenge: Gate must properly seal and address the abrasiveness of the handled material.
Results: Slag – also known as cinder – is a by-product of the ore smelting process. During smelting, ore is exposed to high temperatures. From that, impurities in the ore are separated from the molten metal. Slag is the result of the removed compounds. Ground, granulated slag is often blended with cement to make concrete stronger. It is also used as a fertilizer and as an ingredient to produce fibers for insulation material.