Plate Heat Exchangers

Introduction

Plate heat exchangers are used wherever thermal energy (heat) has to be transferred from one fluid to another. The advantage is that they can maintain the fluid temperature at a very low and stable level – depending on the temperature of the coolant.
Plate heat exchangers consist of a stack of stamped heat exchange plates which are either brazed together or bolted togeher in a frame with gaskets.

Product features

• Cooling capacity of 5 up to 360 kW
• Coolers of the DOC® Series are suitable for most industrial hydraulic applications
• Due to the brazed contact points between the plates, the coolers has a very sturdy design
• This allows best possible resistance against high operating pressures
• 32 bar for series DOC® 14, 30 and 60
• 16 bar for series DOC® 20 and 77
• Brazed design allows temperatures up to 225°C
• The sturdy connection blocks allow high fastening torques for assembling

Applications Of Plate Heat Exchangers

A plate heat exchanger can be used wherever there should be heat transfer between two fluids.

Typical applications are

• Hydraulic Systems
• Presses
• Lubrication Systems
• Test rigs
• Motors / engines

Process

The concept behind a heat exchanger is the use of pipes or other containment vessels to heat or cool one fluid by transferring heat between it and another fluid. In most cases, the exchanger consists of a coiled pipe containing one fluid that passes through a chamber containing another fluid.

Types Of Plate Heat Exchangers

There are four main types

• Gasketed :use high quality gaskets and design to seal plates together and protect against leaks. Plates can easily be removed for cleaning, expansion, or replacing purposes, drastically reducing maintenance costs.
• Brazed : are used in many industrial and refrigeration applications. Due to stainless steel plate composition with copper brazing, they are highly resistant to corrosion.Its are efficient and compact, making them an excellent economic choic
• Welded : are similar to Gasketed model, but instead the plates are welded together. They are extremely durable, and are ideal for transferring fluids with high temperatures or corrosive materials. Since the plates are welded together.
• Semi -Welded : feature a mixture of welded and gasketed plates. They contain pairs of two plates welded together which are then gasketed to other pairs, therefore one fluid path is welded and the other fluid path is gasketed. This results in a plate heat exchanger that is easy to service on one side and able to transfer more intense fluids on the other. This models are perfect for transferring expensive materials since they have a very low risk of fluid loss.

Images

plate Heat Exchangers