What is PHE

Plate Heat Exchangers have been used in all kinds of industries as compact heat exchangers with maximum efficiency.
The Plate Heat Exchanger is a heat transfer equipment consisting of a pack of heat transfer plates, compressed by frames and tightening bolts. Heat transfer plates are made by pressing thin sheets of corrosion-resistant metal such as stainless steel or titanium, setting them with seal gaskets and hanging and piling them on the guide bar. Then, plates are tightened with bolts between the fixed frame and the movable frame.
Here, there is a certain gap between the heat transfer plates that allows liquid to flow.
The liquid inlets and outlets are in the fixed frame or the movable frame.

Heat Transfer Plate 

Heat transfer plates are made by pressing thin sheets of corrosion-resistant metal such as stainless steel or titanium.

Each heat transfer plate is corrugated to various patterns to increase its strength and surface area. Furthermore, the corrugation makes high turbulence and thereby achieves high heat transfer coefficient. Portholes are formed in the plate's four corners.

The gasket is set into the groove around the plate edge to seal in the fluid.

Structure of a Plate Heat Exchanger (PHE)

Thin stainless steel metal plates are sealed with rubber gaskets and are compressed together.

Inverting single plate would change plates type from A-plate to B-plate.

Plate types determine and configure the flow of fluids, wherein fluids (both high and low-temperature fluid) provided from the four portholes of the frames can flow in counter-current direction without intermixing.

Flow Channel of Fluid

The fluid flows alternately through the flow path created between each plate and forms a counter-current of the high-temperature fluid and the low-temperature fluid between every other plate to perform the heat exchange.

Features and advantages

Our plate heat exchanger has excellent characteristics such as high-energy efficiency, compact size, easy maintenance, easy adjustment to capacity change, and relatively low capital investment.
Our wide range of sizes, plates, gasket materials, and add-ons allows you to flexibly and creatively design and configure according to the applications, from the simplest tasks to the most demanding performance and documentation requirements.

High Thermal Efficiency

The press-formed patterns provide a high heat transfer coefficient by a turbulence flow.

Lightweight and Smaller Footprint

Less weight and compact size can be realized by the thin heat transfer plates and the small holding volume.
These features provide simple installation work with low cost.

– Compressed thin heat transferring plates
– Limited fluid capacity
– Smaller heat transferring surface area

Quick Start-up

Smaller holding volume makes quick start-up of the process.
Limited fluid capacity per unit allows quick operation start up, and also possible to correspond to changes in operating conditions with high precision.

Easy maintenance

Simple Assembly and disassembly for inspection and maintenance by loosening the bolts and nuts.

Modular Construction and Design Flexibility

Flexibility to easily implement various thermal programs and future expansions/modifications.

Prevention of Liquid Inter-mixing

Gasket grooves protect it from direct contact with the liquid.
The double-seal gasket with drain avoids any mixing of the two liquids preventing performance deterioration in case of a gasket failure.

World Class of Plate Design

Arsopi Thermal + HISAKA
The forefront of plate design technology for special or difficult applications, expanding the use of regular plate and gasket plate heat exchangers.

Plates & Special Plates

The plate pack is the active part of the heat exchanger where the heat exchange takes place.
Each heat transfer plate is a thin sheet of corrosion-resistant metal such as stainless steel or titanium.

The surface is corrugated to various patterns to increase its strength and surface area and the corrugation makes high turbulence which achieves a high heat transfer coefficient.
Portholes are formed in the plate's four corners.
The gasket is set into the groove around the plate edge to seal in the fluid.

Plate Element Types

Arsopi Thermal offers plates with different surface shapes so that you can choose the most suitable plate heat exchanger according to your application.

Wave Corrugated Pattern

The wave corrugated pattern is also known as the washboard pattern.
There are few points of metal contact between the plates, allowing liquids containing fibres and sludge to easily flow without clogging.

Herringbone Pattern

The “herringbone” pattern was named, as the V-shaped press grooves resemble the bones of a herring.
Pilling the V-shaped pressed plate and rotating it 180 degrees in an alternating pattern can create many contact points.
This ensures high-pressure resistance and the complicated flow path formed by the V-shaped press grooves delivers high heat transfer performance. Moreover, the thin plate reduces the heat transfer resistance, and all this results in a 3-5 times better heat transfer performance than the S&T heat exchanger.

Combining different types of herringbone can optimise this mixed arrangement and decrease the heat transfer area.
Thus, results in an optimal technical / economical solution.

Special Plates

Aside from the concept of an individual heat transfer plate, we also offer the following special plates with outstanding performance to meet more diverse and advanced requirements.

Food Application Plate 

CH-FX and CH-FA plates were specially designed for the Food & Beverage industry

The plate pattern and pressing depth are designed for gentle, uniform heat treatment of sensitive dairy, food, and beverage products.

–  Prevention of Flow Stagnation

–  Complete draining and venting plate design

–  High Self-cleaning (CIP) effect, Long-Term Operation

–  Gentle heat treatment

–  Compatible with PTFE gasket (TCG)

–  Less CIP chemical usage

–  Flexibility by the two patterns -  Washboard pattern / Chevron pattern

Condenser /
Gas Cooler Plate  (FH-YX)

FH-YX series is specially made for being used as condensers, especially for heat exchange duties of large volumes of gas in vacuum systems or under low pressure.

–  High heat transfer coefficient

–  Fewer maintenance works, easily cleaned and inspected

–  Low Cooling water consumption

–  Adaptable for wide range of applications, compatible with PTFE (TCG) gaskets

–  Available for Various international Pressure Vessels Code & Standar



– Overhead condensers for various distillation columns

– Condensers / preheaters for evaporators

– Condensers for gas drying / air conditioning

– Heat recovery exchangers from exhaust steam

– Gas coolers

Multi Gap Plate  (FH-GX)

Specially made for liquids (sludge) or high viscosity fluids containing fibres and solids.

– Widest channel spacing (20 mm)

– Shorter maintenance time due to the glue-free Slit-in system gasket

– By combination of one plate arrangement gives 3 multiple-channel configurations

 Appropriate gap selection according to fluid

– Economic design



– Chemicals

– Dyeing

– Food

– Sugar

– Pulp and paper

– Plating fluid containing sludge, quenching oil

– High concentration sodium hypochlorite, sodium aluminate

– Specifications with a large flow rate ratio on the hot /cold sides plant

 Heat recovery, Snow melting plant

Dual Wall Plate  (FH-CW)

Maximum safety in plate technology that prevents fluid mixing by dual-wall plates and double gasket system.

In case one of the plates were to fail, the leak can be detected from outside because of leaking through the gap of the plates.

– Dual Wall structure & Double seal gasket

– Wide applications where possibility of mixing fluids is extremely dangerous or not permitted to avoid cross contamination between fluids

– Easily cleanable and accessible

– Size and cost reduction



– Cooling of transformer oil

– Cooling of lubrication or hydraulic oil

– Heating / cooling / pasteurization of food processing

– Heating / cooling of fuel oil (marine gas oil: MGO)

– Heating / cooling in bioprocess

– Heating / cooling between fluids where mixing can cause a sudden chemical reaction or generate environmental pollutants

Double-lined Gasket Plate 

Cutting-edge technology, that expands the limits of plate and gasket heat exchangers, designed for high pressure and temperature application and maximum safety against leakage, even of dangerous fluids.

– Double gasketed line design

– Inhibits Oxidation Degradation

– High heat-resistance and high pressure-resistance

– Prevents Leakage Dispersal

– Two sizes available (DN 150/200)

– Leak Detection Holes

– Dangerous fluids suitable



–  High-temperature, high-pressure heat exchangers around boilers

–  Heat exchangers in conventional/ nuclear power applications

–  Heat exchangers for flammable and dangerous fluids 

–  NaOH concentration plants

Gaskets  & Special Gaskets

Gaskets used in plate heat exchangers need durability to withstand a wide range of liquid qualities and temperature / pressure conditions.

Our original gaskets are manufactured under very strict quality control with the highest material quality to support a wide variety of applications.

Combined with a careful gasket material selection, high performance and gasket durability can be expected.

Main material available are:




NBRWater, Brine, Oil application, Daily products, Food & Beverages applications130˚C
EPDMSteam, Hot Water, Caustic Soda, Alcohol, Ammonia, Weak Acid & Alkaline solution, Daily products, Food & Beverages applications150˚C
EPDM-HTSteam, Hot Water, Caustic Soda, Alcohol, Ammonia,
Weak Acid & Alkaline solution
PTFE Encapsulated NBR/EPDMOrganic Chemicals, Solvent, Ultra Pure water, High chemical resistance150˚C
FKM (VITON)Good chemical resistance towards concentrated acids, Oils, lubricants and fuels, Daily products, Food & Beverages applications175˚C
N-EPDMHigh temperature, Aggressive media, Improved sealing performance 180˚C

Special Gasket

Slit-In Gasket
(Glue-free type)

Designed with a snap-on structure that does not use glue.

-  Attached with a fitting structure that does not use glue

-  Reduction of glue odour

-  Important for the food industry

-  Short maintenance works

-  Suitable for applications where frequent replacement of the gasket is required



The newly developed EPDM gasket that has heat resistance and chemical resistance far superior to conventional EPDM, making gasket lifetime to be up to two times higher than regular EPDM and contributes to the best energy saving.


-  High-performance EPDM suitable for harsh usage environments

-  Heat and Chemical durability is more than twice that of conventional EPDM gaskets

-  Good sealing performance



In high-temperature regions where long service life is desired

For caustic soda concentrating equipment in high-temperature regions

In hot water applications (drains, sterile water, etc.) with 51X enhanced resistance to heat and chemicals

PTFE Cushion Gaskets (TCG)

The TCG gasket is integrally molded by wrapping elastic synthetic rubber with a fluorinated resin film, featuring excellent chemical resistance and low friction.


-  Excellent chemical resistance, Solvent resistance, Low friction

-  Stable and high sealing performance

-  Ensuring odourless against "rubber odour" or odour from liquids

-  Optimization of gasket material and cost reduction

-  Easy maintenance

-  Compatible with pressure vessel standards

-  Expansion of application range by allowing use of gasketed plate exchangers and all its benefits



Applications with limited use of synthetic rubber such as fine chemicals, petrochemicals, pharmaceuticals and the food industry

Accessories, Connections, Special Parts

Arsopi-Thermal flexible production is focus on customer’s needs and we can supply different solutions customized to our customer’s demands.

A variety of accessories are available:

  •  Condensate tray
  •  Metallic protection cover
  •  Insulation
  •  Standard and Customized connections
  •  Inlet filters
  •  Thermometers and manometers
  •  Different RAL Paint colours and procedures according customers´ requests
  •  Others upon request


Special connections can be requested on-demand.

As a manufacturer focused on the customer’s needs, Arsopi Thermal can adapt the heat exchanger connections accordingly to let the customer avoid piping modification and to save costs on the final project.