- The air rock drill operates on a simple yet effective principle. It uses the kinetic energy of compressed air to rapidly move a piston back and forth within a cylinder. At the end of this cylinder is a bit, which strikes the surface with tremendous force. These repeated impacts, occurring dozens of times per second, enable the bit to penetrate even the hardest materials with relative ease.
This isophthalic polyester resin formulation is designed for industrial and chemical processing applications where corrosion resistance is important. Color: green or dark gray. Flame Spread: ASTM rating of 20 or less. IFR is also available in a UL Classified resin formulation.


AOC Aliancys announced: AOC Aliancys (Nanjing, China) started to produce the AOC resins according to the formula imported from the headquarter in the U.S.A.

To help make installations safer, Openchannelflow offers Fiberglass Grating Covers for its line of flumes and Packaged Metering Manholes. Using a unique narrow opening grating, Openchannnelflow molds in a support channel at the top of the flume. The fiberglass grating is then cut to size and nestled into the flume.