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Plate Heat Exchanger

Shell & Plate

Spiral Heat Exchanger

Prime Surface HE

344 Bloor St. West, Unit #607 Toronto, ON M5S 3A7 Canada |

Tel.: +1 416-423-5590

E-Mail: [email protected]

Contents Page

DHP Engineering 3

Plate Heat Exchanger 4-5

Shell & Plate Heat Exchanger 6-7

Spiral Heat Exchanger 8-9

Prime Surface Heat Exchanger 10

Client List 11

Certifications 12

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Founded in 1978, DHP Engineering was the first Plate Heat Exchanger Manufacturer in South Korea. Today, it has

grown to be one of the world leaders in heat exchangers featuring a unique patented gasket that is designed to have

longer service life, prevent leakage, and withstand higher operating pressures.

To ensure high quality products, DHP integrates the entire manufacturing processes internally from the

warehousing of raw materials, production, and to the final inspection. In 2007, DHP completed a full scale test

facility to simulate various operating conditions to evaluate heat transfer capacity and monitor internal and external

leakage from pressure surges.

DHP Engineering Co., Ltd.

R&D Performance Test Control Center

R&D Performance Test Control Facility

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High Heat Transfer Coefficients

Space Saving Compact Design

Innovative Adhesive-Free Gasket Design

Custom Engineered Applications

Single Pass, Multi Pass, and Single- & Multi-Pass


Serviceable/Rebuildable (Gasketed Heat Exchanger)

The main principles of plate type heat exchangers (PHEs) is to allow the cross-flow of two fluids over a larger

surface area. Plate heat exchangers have high thermal efficiency since the hot fluid flows downwards and the cold

fluid flows upwards over large exposed plates. Compared to a typical tube type heat exchanger, a PHE has several

times higher heat transfer efficiency due to cross-flow and the corrugations in the plates increase turbulence and

reduce the Reynolds number (Re).

Single & Multi Pass Heat Exchanger

Plate Heat Exchanger

Camshaft Lube

Oil Cooler

Fresh Water


Central Fresh Water Coolers

Main Engine

Lube Oil Cooler

Jacket Water Cooler

Stern Tube

Lube Oil


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Plate Heat Exchanger

Heat Transfer Plates

Patented Double Seal Gasket

28 Registered International Patents

Longer Gasket Service Life

Higher Operating Pressures (up to 50 bar)

Conventional Design Double Sealing Design


Max. Operating Temperature: 250C

Max. Operating Pressure: 20 bar (high pressure 50 bar)

Plate Materials: Titanium, SUS 304, SUS 316L, Hastelloy, etc.

Gasket Materials: NBR, VITON, Hypalon, Butyl, FPM, EPDM, etc.

Frame Materials: Carbon Steel, SUS 304, SUS 316

Fluid Channel

Carry/Guide Bar


Fluid Division Side

Ring Gasket


Heat Transfer Area

Herringbone Face:

3 Dimensional Flow

Corrugated Face:

2 Dimensional Flow

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Shell & Plate Heat Exchanger

The Shell & Plate Heat Exchanger comprises of the benefits of a Shell & Tube Heat Exchanger and the benefits of

a Plate Heat Exchanger.

This type of a heat exchanger features a welded plate pack contained within a high pressure vessel. The main

applications include condensers, evaporators, or any other application requiring a heat exchanger that can

withstand high pressure and high temperature but in a compact size for space savings or restrictions. The

maximum operating pressure is up to 100 bar and a maximum temperature of up to 400C.


Design Temperature: -196C to 400C

Max. Operating Pressure: 100 bar

Heat Transfer Coefficient: Up to 6000 kcal/m2hrC

Plate Materials: Titanium, Nickel, SUS 316, 254 SMO, etc.

Shell Materials: SS 400, SUS 304, SUS 316, Titanium, Nickel, etc.

Design Information

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Shell & Plate Heat Exchanger


Shipbuilding Industry: HFO cooler, steam heater, oil cooler, vacuum condenser

Chemical Industry: EO/EG heat exchanger, VOC condenser, high pressure and high temperature waste heat

recovery heat exchanger, ethanol condensing solvent recovery system

Refrigeration Industry: evaporator, condenser

HVAC Industry: district heat, hot water supply and heating for water, HVAC, cooling and heating system, steam


Other Industries: power plant and other applications requiring high temperature and high pressure waste heat

recovery system

Liquid:Liquid Gas Cooling Top Condenser Kettle Type Evaporator


Air Cooling


Condenser Line Heater & Cooler

Boiler or


HTST System (Food) Oil Heater Waste Gas Heat Recovery Evaporator & Filling

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Spiral Heat Exchanger

The Spiral Heat Exchanger benefits from having wider fluid channels while remaining compact in size with high

heat transfer efficiency. The fluid channels for this type of heat exchanger is welded which virtually eliminates the

risk of mixing between the fluids when compared to a gasket type heat exchanger. Service life is increased and

maintenance cost is reduced since the design of the heat exchanger minimizes fouling. If maintenance is required,

the cover can be easily opened for chemical or mechanical cleaning. Spiral Heat Exchangers allow for free flow of

particulates or slurries and is suitable for applications in the chemical, gas/coal, paper, sugar/food, and textile



Chemical Industry: preheating, cooling and condensing of various fluids such as dense sulfuric acid in liquid or

vapor phase, oleum, nitric acid, acrylic acid, fatty acid, etc.

Paper Industry: gas, lye cooler, waste gas, turpentine cooler, heat recovery, surface condenser of evaporation

plant, etc.

Food Industry: preheater and surface condenser for juice, vegetable oil, waste water, etc.

Textile Industry: heat exchanger and recovery at dying or washing phase

Gas & Coal Industry: condenser for ammonia solution, benzene washing fluid, ammonia sulfide, etc.

Designed and Fabricated for Specific


Counter- or Cross-Flow

Spiral Heat Exchangers

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Spiral Heat Exchanger

Type I: Counter-Flow Spiral Heat Exchanger

The layout of a Counter-Flow Spiral Heat Exchanger allows fluid to flow from

both sides to form perfect counter flow so heat transfer is still possible even if

there is only a minor difference in temperature. If there is fouling from

particulates on the wall surface or at the bottom due to a decrease in flux or

during a stand-by in operation, once the flux has recovered, it acts as self-

cleaning for the contamination. The cross-flow spiral heat exchanger is

suitable for both liquid:liquid and vapor:liquid applications.

Applications: liquid, condenser, gas cooler, etc.

Type II: Cross-Flow Spiral Heat Exchanger

The design of our Cross-Flow Spiral Heat Exchanger where the heat transfer

between fluids occurs vertically and is used for processing mixtures, steam, and

gas for evaporation or condensation purposes. The vertical flow of fluid passes

through heat exchanger at a high flow rates with minimal pressure loss. This type

of spiral heat exchanger is mainly used for steam or gas but can sometimes be

used for heat exchange between liquid:liquid which has a much larger difference

in the flux.

Applications: vaporizer, condenser, reboiler, gas cooler, heater, etc.

Counter-Flow Spiral HE

Cross-Flow Spiral HE


Max. Operating Temperature: 300 C

Max. Operating Pressure: 100 bar

Plate Materials: Titanium, SUS 304, SUS 316L, Nickel Alloy, etc.

Heat Transfer Area: 2 - 600 m2/set

Heat Transfer Coeffi