How to connect the 4 ports of the plate heat exchanger? （Parallel Type connections）

The plate heat exchanger is composed of a group of metal corrugated plates with a sealing rubber gasket, and different media flow inside to exchange heat. Plate heat exchangers have simple and complex process combinations, and different process compositions can allow multiple media to transfer heat in the heat exchanger. Today we explain the 4 ports of the simplest two-liquid heat exchanger.

 

In a single process, 4 holes are generally used, which is also the most common heat exchanger on the market. What is the difference between the 4 holes? In daily use, it is generally divided into parallel type hole and diagonal hole type.

 

What MC Heat Parts often does is the parallel type , please see the picture below: 

We generally use D1 as the heat medium inlet -the temperature inlet of the heat source, such as: boiler hot water/steam, etc.; D2 is the heat source outlet; D3 is the inlet of the cold medium-the inlet of source temperature, and D4 is the outlet of cold medium- the outlet of the cold source. However, in the actual process, the temperature of the D4 port is very high, so it often cmakes people confused.:Which hole is inlet or outlet?

 

In daily maintenance work, many people often encounter heat exchangers that have been worked for a long time. These heat exchangers do not have nameplates or instructions. So how do we judge whether the connections are parallel type or diagonal type?It's actually very simple. Just pour a bottle of water and pour it into D1 port. If the water comes out from the D2 port in the lower right corner, it is a parallel type, and if the water flows out from the lower left corner, it is a diagonal type.

 

If you have any plate heat exchanger questions, please contact MC Heat Parts any time!