tender for supply of impeller for boiler id fan , supply of impeller for boiler id fan . , m . s . impeller with hub ( without shaft ) make- airochem engg . kolhapur i ) capacity - 37m3 / sec . ii ) static pressure - 350 mm wc at working iii ) operating temp . - 110 deg . c iv ) speed - 750 rpm v ) motor hp - 300 hp vi ) type of fan - back word curve ( contilever type ) material of construction: i ) impeller back plate-m . s . plate is20623-14 mm ii ) front and blade- m . s . plate is2062-8 mm note:- blade should be hard and faced with n-6006 electrode . the shaft to be supplied by us and fan to be duly fitted on the existing shaft and balanced .