We are in urgent need of D-type Water Tube Boiler, with membrane type flat in welded wall construction, packaged water steam generator, with operating pressure of 600 psig, deareator capacity of 50, 000 PPH (lbs per hour) of superheated steam at 650 deg. F, capable of firing 100% bunker C or 100% biogas or simultaneous firing of bunker and biogas, with a no-stop solution for maintenance (not requiring total machine shutdown in case of maintenance) .  Kindly give us your best FOB or C & F Quotations.