Steam-to-water preheaters ПП

Steam-to-water  preheaters  (ПП)  are  designated  for  heating  and  hot  water  supply  systems, operating in the following temperature conditions: 70/150 °C; 70/130 ° Сand 70/95 ° С.

Piped systems may be manufactured from plain or corrugated brass pipes. Upon request of a customer,  shells  and  piped  systems  of  preheaters  can  be  manufactured  from  special  steels  and alloys.

Steam-to-water  preheater  is  a  shell-and-pipe  heat  exchanger  of  a  horizontal  type,  having  the following assembly units: shell, piped system, front and rear (floating) water chambers, shell cover.Main units of a pre-heater are assembled with the help of detachable flange joint, which ensures the possibility of preventive inspection and repair.

Heated water flows in the preheater by pipes and heating steam is supplied through a branch pipe in the upper part of the shell to an intertubular area, in which a segmental baffle plates, guiding the steam flow direction, are installed. Condensateof the heating steam flows down to the lower part of  the  shell  and  is  drained  from  the  preheater.  Noncondensable  gases  (air),  accumulated  in  the preheater, are drained via branch pipe in the shell.

Estimated service life of the steam-to-water preheaters – 12 years. Warranty operation period – 24 months since the date of putting the preheater into operation, but not more than 36 months since the date of its shipment to a customer.