heat exchanger replacement

The heat exchangers below are 1:1 replacements for the Kelvion GBS757L

Fits directly without modifying your pipework — delivered quickly from our own stock.

Installer or service company?

Installers and service companies order from their own net price list once their business account has been approved.

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UNEX PBG45L-30 — replacement for Kelvion GBS 757L-30

Kelvion GBS 757L-30 can be replaced by UNEX PBG45L-30

UNEX PBG45L-30

In stock — fast delivery

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-34 — replacement for Kelvion GBS 757L-34

Kelvion GBS 757L-34 can be replaced by UNEX PBG45L-34

UNEX PBG45L-34

In stock — fast delivery

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-40 — replacement for Kelvion GBS 757L-40

Kelvion GBS 757L-40 can be replaced by UNEX PBG45L-40

UNEX PBG45L-40

In stock — fast delivery

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-44 — replacement for Kelvion GBS 757L-44

Kelvion GBS 757L-44 can be replaced by UNEX PBG45L-44

UNEX PBG45L-44

Available on request

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-50 — replacement for Kelvion GBS 757L-50

Kelvion GBS 757L-50 can be replaced by UNEX PBG45L-50

UNEX PBG45L-50

On order — expected around 19/10/2026

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-60 — replacement for Kelvion GBS 757L-60

Kelvion GBS 757L-60 can be replaced by UNEX PBG45L-60

UNEX PBG45L-60

In stock — fast delivery

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-70 — replacement for Kelvion GBS 757L-70

Kelvion GBS 757L-70 can be replaced by UNEX PBG45L-70

UNEX PBG45L-70

In stock — fast delivery

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-80 — replacement for Kelvion GBS 757L-80

Kelvion GBS 757L-80 can be replaced by UNEX PBG45L-80

UNEX PBG45L-80

On order

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-90 — replacement for Kelvion GBS 757L-90

Kelvion GBS 757L-90 can be replaced by UNEX PBG45L-90

UNEX PBG45L-90

Available on request

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-100 — replacement for Kelvion GBS 757L-100

Kelvion GBS 757L-100 can be replaced by UNEX PBG45L-100

UNEX PBG45L-100

On order

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

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UNEX PBG45L-110 — replacement for Kelvion GBS 757L-110

Kelvion GBS 757L-110 can be replaced by UNEX PBG45L-110

UNEX PBG45L-110

Available on request

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

Request a quote View in webshop

UNEX PBG45L-120 — replacement for Kelvion GBS 757L-120

Kelvion GBS 757L-120 can be replaced by UNEX PBG45L-120

UNEX PBG45L-120

Available on request

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

Request a quote View in webshop

UNEX PBG45L-130 — replacement for Kelvion GBS 757L-130

Kelvion GBS 757L-130 can be replaced by UNEX PBG45L-130

UNEX PBG45L-130

Available on request

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

Request a quote View in webshop

UNEX PBG45L-140 — replacement for Kelvion GBS 757L-140

Kelvion GBS 757L-140 can be replaced by UNEX PBG45L-140

UNEX PBG45L-140

Available on request

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

Request a quote View in webshop

UNEX PBG45L-150 — replacement for Kelvion GBS 757L-150

Kelvion GBS 757L-150 can be replaced by UNEX PBG45L-150

UNEX PBG45L-150

Available on request

1:1: same port-to-port dimensions (460 × 198 mm) and connection G2" external thread

Request a quote View in webshop

For the Kelvion GBS757L, HEXCHANGE supplies a 1:1 replacement: the UNEX PBG45. The port-to-port dimensions of both units are identical (460 × 198 mm) and the G2" male thread also matches, so the PBG45 takes the place of your current heat exchanger without any changes to the pipework. The PBG45 is a brazed plate heat exchanger with AISI 316L stainless steel plates, copper-brazed. The series ranges from 30 to 150 plates; you simply choose the version with the same number of plates as your GBS757L. The Kelvion GBS 757L-80, for example, can be replaced by the PBG45L-80. Some versions are in stock at our warehouse in Oosterhout (the Netherlands); the other sizes are quickly available on request. Matching cold or thermal insulation can easily be ordered along with it. Look up your type number in the table above to find the right replacement, or call +31 (0)162 429 068 for advice. If you request a quotation, you will receive a quote within one working day.

Frequently asked questions about replacing the Kelvion GBS757L

Will the UNEX PBG45 fit my Kelvion GBS757L without modifications?

Yes. The replacement has the same port-to-port dimensions (460 × 198 mm) and the same connections (G2" external thread), so the existing pipework does not need to be modified.

Is the replacement for the Kelvion GBS757L available from stock?

5 of the 15 versions are in stock in our warehouse in Oosterhout, the Netherlands, and are delivered quickly. The other versions are available on request.

Which plate counts are available?

The replacements are available from 30 to 150 plates, in 15 versions. Choose the version with the same plate count as your current Kelvion GBS757L.

What does it cost to replace a Kelvion GBS757L?

Request a no-obligation quote; you will receive pricing within one working day. Call us for expert advice: +31 (0)162 429 068.