Heat Transfer Pipes/
Heat Exchangers

Nishiyama’s heat exchangers—featuring technology for improved heat transfer performance.

Nishiyama develops double-pipe heat exchangers with multi-petal heat transfer pipes whose thermal conductance drastically surpasses that of conventional double pipes. We also develop capillary insert heat transfer pipes leveraging multi-petal heat transfer pipes. Our newly-developed heat exchangers are used in various sectors to help increase efficiency and save energy.

Nishiyama’s heat exchangers

Multi-petal heat transfer pipes
Multi-petal heat transfer pipes
Double-pipe heat exchangers with multi-petal heat transfer pipes
Double-pipe heat exchangers with multi-petal heat transfer pipes
Capillary insert heat transfer pipes
Capillary insert heat transfer pipes

Double-pipe heat exchangers with multi-petal heat transfer pipes

Heat exchange efficiency increased by more than 2 times compared to conventional exchangers.

Nishiyama double pipes with multi-petal shaped inner pipes greatly increased the contact area between two liquids flowing on either side (heat transfer) without increasing the cross-section area to realize heat exchange efficiency that exceeds conventional products.

Conventional product/Our product

Three special characteristics

熱交換器性能比較
Multi-petal heat transfer pipes
Multi-petal heat transfer pipes/
high-efficiency heat exchangers
We can form various cross-section shapes using drawing methods. Small-diameter and ultra-thin pipes also possible. We can also round out the edges of the multi-petal heat transfer pipes to make connections easy.
high-efficiency heat exchangers
●Our multi-petal double-pipe heat exchangers can be bent at will to create various shapes.
●Outer diameters of 10 to 35mm, thicknesses of 0.5 to 2.5mm and up to 12m in length are available (for specs outside this range, please inquire separately).
Multi-petal double-pipe heat exchangers
Multi-petal double-pipe heat exchangers Standard heat exchangers developed independently by Nishiyama. This product can be used as trials
Example product applications:
Boiler reheating heat exchangers, high-voltage heat exchangers for CO2 refrigerants, S&T heat exchangers for compressors, heat exchangers for exhaust heat recovery, etc.

Nishiyama’s technologies

Nishiyama’s technologies image

We developed heat transfer pipes with superior corrosion resistance.

Our multi-petal heat transfer pipes and high-efficiency heat exchangers can be produced with copper alloys, stainless steel and aluminum alloys. We can make pipes for any desired corrosion resistance, thermal resistance, light-weight or other specs (for sizes, please inquire separately).

Three advantages

Examples Of Heat Exchange
Component Applications

Capillary insert heat transfer pipes

Achieving flexible pipes with superior bendability.

Our superior bending process creates various shapes. Also compatible to substitute CFCs and CO2 refrigerants.

Capillary insert heat transfer pipes

Two special characteristics

多葉状伝熱管

Capillary insert heat transfer pipes We use the caulking method for soldering. 100% recycled materials can be used for solder without mixing metals such as brazing filler metals in order to keeping the environmental burden low.

Example product applications:
Water heat exchangers for home and commercial boilers
Examples Of Heat Exchange
Component Applications