Plate And Shell heat exchangers from SEHENSTAR are a fusion of these two types and accomplish new ways of plate heat exchanger applications. They consist of a stack of stainless steel plate pairs which form two separate flow channels. Between these flow channels heat is transferred through the plate. This is similar to plate And frame type heat exchangers.

In plate And shell heat exchangers one fluid enters and leaves the plate stack through the shell that is  why the plates have only two holes and not four like in plate And frame heat exchangers. A simple parallel flow arrangement is shown in left figure. The flow channels are sealed against each other by welding. The circumferences of the plates and the edges of the holes are welded alternately.

                                      

The possibilities of flow arrangements in plate And shell heat exchangers are as manifold as in plate And frame heat exchangers. Several passes on the shell and plate side are implemented by certain baffle arrangements. Countercurrent, co-current and even cross flow can be achieved.  Cross Flow is obtained by turning the stack by 90°relative to the flow direction of the shell side fluid.

                    

Plate heat exchangers manufactured by SEHENSTAR are generally laser-welded. The laser-welding process ensures high quality weld seam. The molten area at the plate equals up to 3.5 times the plate thickness. Hence the plate stack is less sensitive to pressure and temperature changes. Additionally the geometric shape of the plate makes tensions spread homogenously in the plate material. This is an advantage compared to rectangular plates. Applications of plate And shell heat exchangers can cover temperatures of 550 °C and up to 150 bar.

When shown alongside an equivalent thermal duty shell And tube exchanger, the SEHENSTAR Plate And Shell Heat Exchanger demonstrates the true meaning of compact heat transfer. (only 30% of a traditional tubular heat exchanger) 

SRA plate And shell heat exchanger plate parameters:

Model		22	46	72	179	450	647	820	1200
Max.Flow	m3/h	30	60	110	150	200	300	600	900
Max.Area	m2	5	15	30	100	225	320	500	700
Plate Thickness	mm	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1	0.6~1
Nozzle	mm	15~40	15~65	15~80	25~125	65~250	65~250	80~300	80~350
Plate Materials	AISI 304,AISI 316L,AISI 904L,254MO,TI,NI,HASTELLOY...
Shell Materials	Cs,AISI 304,AISI 316L,AISI 904L,254MO,TI,HASTELLOY...

      * Above parameters for reference only, for our continues improvement, the parameters maybe changed, please contact us for more details.