The V UD-Series is offered in a range of models from 276 to 8,120 cfm (125 to 400 mm). A hydraulically operated slide valve regulates the compressor capacity from 10 percent to full load, and it is engineered to offer improved part-load performance. The internal volume ration (Vi) may be manually adjusted from 2.6 to 5.8 (2.2 to 5.0 as an option) to provide low power consumption. The rotor’s “O” profile reduces the rotor interlobe gas blow-by and improves sealing oil film on the rotor surface by use of a circular arc profile rather than the conventional sealing edge. It is housed in a low porosity cast-iron, ANSI/ASHRAE Std. 15, hydraulically tested at 470 psig housing after assembly.

Mycom (Mayekawa USA Inc.)