PR series for rectangular ducts

PR plate heat exchanger with X-shaped air passage designed for exhaust air heat recovery in conditioning and ventilating systems.

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Products in this series (9)

PR 400x200	PR 500x250	PR 500x300
PR 600x300	PR 600x350	PR 700x400
PR 800x500	PR 900x500	PR 1000x500

Series		Flange designation (WxH), mm
PR PK		400х200; 500х250; 500х300; 600х300; 600х350; 700х400; 800х500; 900х500; 1000х500
VL		400х200; 500х250; 500х300; 600х300; 600х350; 700х400; 800х500; 900х500; 1000х500

Applications

PR plate heat exchanger with X-shaped air passage designed for exhaust air heat recovery in conditioning and ventilating systems. The heat exchangers are connected directly to the rectangular ducts both with parallel and perpendicular or diagonal ducting at 45°. Various connection modification are possible due to bend fittings which shall be ordered in the required quantity. The transported air shall not contain solid, fibrous, aggressive and explosive impurities.

Design

The heat exchanger casing is made of galvanized steel. The surface of the heat exchanger appears as a package of thin aluminium plates to ensure the efficient heat exchange. Provision is made for collecting some quantity of the condensate which tends to appear at exhaust surface at the bottom removable panel. PR heat exchangers equipment list includes connecting pipe on the bottom panel for condensate removing.

Technical data

Efficiency is the basic characteristics of the plate heat exchanger, i.e. performance as well as air resistance in the duct.

The thermal efficiency is calculated as follows:

ts - supply air temperature after heat recuperation;
t_i- intake air temperature before heat recuperation;
t_e - extract air temperature before heat recuperation.

Possible layout arrangements of PR heat exchanger and bends PK:

Accessories

1. PK bend

Designed for easy mounting of the heat exchanger in any modifications of the air duct.
Bend designation PK 600 х 300

Type	Dimensions [mm]						Weight [kg]
Type	B	B1	B2	H	H1	H2	Weight [kg]
PK 400x200	400	420	440	200	220	240	2.2
PK 500x250	500	520	540	250	270	290	3.3
PK 500x300	500	520	540	300	320	340	3.5
PK 600x300	600	620	640	300	320	340	4.5
PK 600x350	600	620	640	350	370	390	4.7
PK 700x400	700	720	740	400	420	440	5.9
PK 800x500	800	820	840	500	520	540	7.5
PK 900x500	900	920	940	500	520	540	8.7
PK 1000x500	1000	1020	1040	500	520	540	10.3

2. Summer block VL

For the summer period the heat exchanger can be replaced with the summer block VL which performs no heat recovery but reduces pressure loss by 10%. It is applied in systems without by-pass at the inlet and in systems with no cooling.