The Marley NS7 counterflow nozzle is an injection molded polypropylene unit consisting of two parts—the main assembly with integral turbulator and an EDPM rubber grommet. NS7 nozzles are designed to economically provide desired thermal performance at low spray heights typical of factory assembled cooling towers.
NS7 nozzles are produced in two sizes. The NS7-150 has a nominal insert OD of 1.5” and the NS7-200 has a nominal insert OD of 2”. Recommended spray height above the fill is between 7” and 15”.