PHEXPAK LITE PACKAGED brazed Plate Heat Exchangers
FlexEJ’s range of simple, compact, cost-effective and light-weight packaged brazed plate heat exchangers.
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Design & Manufacturing
Full in-house design & manufacture to EN / ASME / PED.
ISO14001 Accreditation
FlexEJ has an accredited Environmental Management System.
PhexPak Lite
Packaged Brazed Plate Heat Exchangers
Weighing in at less than 40kg with all options included, PhexPak Lite is the lightest packaged heat exchanger in our range, and also has the smallest footprint, making transport and installation easy.
PhexPak Lite
PhexPak Lite
PhexPak Lite
PhexPak Lite
PhexPak Lite
PhexPak Lite
Our PhexPak Lite range is designed and built at our factory in the UK and in stock for dispatch within 24 hours.
PRODUCT GUIDES
PHEXPAK LITE
WHAT IS A PACKAGED BRAZED PLATE HEAT EXCHANGER?
A compact high-performance solution for commercial DHW systems
OVERVIEW
A brazed plate heat exchanger combined with additional specific temperature and flow control components.
Applications
Hot water systems (DHW / HWS).
Rating
95°C Max temperature, 6barg max pressure rating.
WARRANTY
The FlexEJ PhexPak Lite comes with up to a 2 year warranty.
FlexEJ PhexPak Lite SGTG 3 Port Packaged Brazed Plate Heat Exchangers
The SGTG version has 3 Port Valve, Primary Pump & Secondary Transfer Pump. The table shows performance and physical dimensions
| Power (kW) | DHW flow rate (l/s) | Dim A (mm) | Dim B (mm) | Dim C (mm) |
|---|---|---|---|---|
| 50 | 0.24 | 470 | 470 | 970 |
| 100 | 0.48 | 470 | 470 | 970 |
| 150 | 0.72 | 470 | 470 | 970 |
Hot Water performance – Instantaneous system with storage Primary 80°C, Secondary 10-60°C
FlexEJ PhexPak Lite SGRG 3 Port Packaged Brazed Plate Heat Exchangers
The SGRG version has 3 Port Valve, Primary Pump & Secondary Recirculation Pump. The table shows performance and physical dimensions
| Power (kW) | DHW flow rate (l/s) | Dim A (mm) | Dim B (mm) | Dim C (mm) |
|---|---|---|---|---|
| 50 | 0.24 | 470 | 625 | 970 |
| 100 | 0.48 | 470 | 625 | 970 |
| 150 | 0.72 | 470 | 625 | 970 |
Hot Water performance – Instantaneous system with storage Primary 80°C, Secondary 10-60°C
FlexEJ PhexPak Lite SGNP 3 Port Packaged Brazed Plate Heat Exchangers
The SGNP version has 3 Port Valve & Primary Pump. The table shows performance and physical dimensions
| Power (kW) | DHW flow rate (l/s) | Dim A (mm) | Dim B (mm) | Dim C (mm) |
|---|---|---|---|---|
| 50 | 0.24 | 470 | 430 | 970 |
| 100 | 0.48 | 470 | 430 | 970 |
| 150 | 0.72 | 470 | 430 | 970 |
Hot Water performance – Instantaneous system with storage Primary 80°C, Secondary 10-60°C
FlexEJ PhexPak Lite NPTG 2 Port Packaged Brazed Plate Heat Exchangers
The NPTG version has 2 Port Valve & Secondary Transfer Pump. The table shows performance and physical dimensions
| Power (kW) | DHW flow rate (l/s) | Dim A (mm) | Dim B (mm) | Dim C (mm) |
|---|---|---|---|---|
| 50 | 0.24 | 350 | 470 | 970 |
| 100 | 0.48 | 350 | 470 | 970 |
| 150 | 0.72 | 350 | 470 | 970 |
Hot Water performance – Instantaneous system with storage Primary 80°C, Secondary 10-60°C
FlexEJ PhexPak Lite NPRG 2 Port Packaged Brazed Plate Heat Exchangers
The NPRG version has 2 Port Valve & Secondary Recirculation Pump. The table shows performance and physical dimensions
| Power (kW) | DHW flow rate (l/s) | Dim A (mm) | Dim B (mm) | Dim C (mm) |
|---|---|---|---|---|
| 50 | 0.24 | 350 | 625 | 970 |
| 100 | 0.48 | 350 | 625 | 970 |
| 150 | 0.72 | 350 | 625 | 970 |
Hot Water performance – Instantaneous system with storage Primary 80°C, Secondary 10-60°C
FlexEJ PhexPak Lite NPNP 2 Port Packaged Brazed Plate Heat Exchangers
The NPNP version has 2 Port Valve, no Pumps. The table shows performance and physical dimensions
| Power (kW) | DHW flow rate (l/s) | Dim A (mm) | Dim B (mm) | Dim C (mm) |
|---|---|---|---|---|
| 50 | 0.24 | 350 | 430 | 970 |
| 100 | 0.48 | 350 | 430 | 970 |
| 150 | 0.72 | 350 | 430 | 970 |
Hot Water performance – Instantaneous system with storage Primary 80°C, Secondary 10-60°C
How does the PhexPak Lite Packaged Brazed Plate Heat Exchanger work?
PhexPak Lite features an intelligent control system allowing app-based operation from any smart device via Bluetooth connectivity. Standard operating functions via local interface. BMS connectivity via BACnet allows for full set-up and operation. Daisy chain functionality allows multiple units to be connected easily.
Introducing FlexEJ’s New PhexPak Lite Brazed Plate Heat Exchangers
The FlexEJ PhexPak Lite range is designed specifically to be installed for hot water supply in small to medium commercial applications. Designed and manufactured in the UK, and utilising only the very best components, this product offers high quality, and real value for money, in a compact package.
PhexPak Lite Key Features
Digital Functionality
- Intelligent operation – linked by Bluetooth to any smart device
- Smart App for full application setup and control
- BACnet connectivity with Daisy Chain capability
- Local interface displaying: – Set point – Secondary flow temp – Fault indicator – On/Off
- Built in manual reset hi-limit function
- Built in fault indicator function
Performance
- 50 kW to 150 kW heat load duty
- Up to 0.72 l/s secondary flow @10-60°C DHW
- Single head primary pump
- Primary supply temp up to 95°C
- 3 port or 2 port mixing valve according to chosen configuration
- 316 stainless steel exchanger plates
- Brazed plate heat exchanger construction
PhexPak Lite Product Range Overview
There are six standard versions of PhexPak Lite each available in three different heat load duties (50kW, 100kW and 150kW). Three versions have 3 port primary control with primary pump and secondary pump configured for either semi-instantaneous (SGTG) or instantaneous systems (SGRG) or with no secondary pump (SGNP). Three versions have 2 port primary control and secondary pump configured for either semi-instantaneous (NPTG) or instantaneous systems (NPRG) or with no secondary pump (NPNP).
PhexPak Lite SGTG
For use with semi-instantaneous DHW / HWS systems when linked to a direct feed buffer vessel, includes primary and secondary pumps
- Heat load duty up to 150kW
- 3 port primary control and recirculation
- Secondary flow management
- Grundfos multispeed primary pump
- Grundfos multispeed secondary pump
To find out more about the SGTG and see full product and technical details do click the model links below or call our expert team in the UK on 01384 88 11 88
PhexPak Lite SGRG
For use with instantaneous DHW / HWS systems with no storage, includes primary and secondary pumps with recirculation kit
- Heat load duty up to 150kW
- 3 port primary control and recirculation
- Secondary flow management
- Grundfos multispeed primary pump
- Grundfos multispeed secondary pump
To find out more about the SGRG and see full product and technical details do click the model links below or call our expert team in the UK on 01384 88 11 88
PhexPak Lite SGNP
For use DHW / HWS systems, includes primary pump only
- Heat load duty up to 150kW
- 3 port primary control and recirculation
- Secondary flow management
To find out more about the SGNP and see full product and technical details do click the model links below or call our expert team in the UK on 01384 88 11 88
PhexPak Lite NPTG
For use with semi-instantaneous DHW / HWS systems when linked to a direct feed buffer vessel, includes secondary pump only
- Heat load duty up to 150kW
- 2-port primary control valve
- Secondary flow management
- Grundfos multispeed secondary circulator
To find out more about the NPTG and see full product and technical details do click the model links below or call our expert team in the UK on 01384 88 11 88
PhexPak Lite NPRG
For use with instantaneous DHW / HWS systems with no storage, includes secondary pump only with recirculation kit
- Heat load duty up to 150kW
- 2-port primary control valve
- Secondary flow management
- Grundfos multispeed secondary pump
To find out more about the NPRG and see full product and technical details do click the model links below or call our expert team in the UK on 01384 88 11 88
PhexPak Lite NPNP
For use with DHW / HWS systems, no pumps
- Heat load duty up to 150kW
- 2-port primary control valve
- Secondary flow management
To find out more about the NPNP and see full product and technical details do click the model links below or call our expert team in the UK on 01384 88 11 88
The PhexPak Lite Product Dimensions
Hot Water performance – Instantaneous system with storage
Primary 80°C, Secondary 10-60°C
| Power (kW) | DHW flow rate (l/s) | Dim A mm | Dim B (mm) | Dim C (mm) |
|---|---|---|---|---|
| 50 | 0.24 | 470 | 470 | 970 |
| 100 | 0.48 | 470 | 470 | 970 |
| 150 | 0.72 | 470 | 470 | 970 |
PhexPak Lite Hot Water Performance
The PhexPak Lite can be combined with our standard buffer vessels to achieve a range of peak hot water flows in semi-instantaneous systems. The table below shows the 60min peak flow and recovery times for the three PhexPak Lite power ratings combined with four buffer volumes.
| Power (kW) | Buffer Vessel Capacity (L) | Peak Hot Water Flow 60 mins (L) | Buffer Vessel Recovery Time (Mins) |
|---|---|---|---|
| 50 | 250 | 1089 | 16 |
| 500 | 1314 | 31 | |
| 750 | 1539 | 47 | |
| 1000 | 1764 | 63 | |
| 100 | 250 | 1953 | 8 |
| 500 | 2178 | 16 | |
| 750 | 2403 | 23 | |
| 1000 | 2628 | 31 | |
| 150 | 250 | 2817 | 5 |
| 500 | 3042 | 10 | |
| 750 | 3267 | 16 | |
| 1000 | 3492 | 21 |
Assuming semi-instantaneous system with storage. Primary 80°C, Secondary 10-60°C
Flexibility, Size & Customisation
The PhexPak Lite packaged plate heat exchanger has been designed to allow for a flexible approach to installation location. The unit can be floor mounted for a typical install, or wall mounted utilising the supplied wall bracket to make the most of the plant room space available.
Your Specific Requirements
We understand that there are many different challenges and obstacles to overcome when installing plant room equipment, whether that’s newbuild or refurb. The PhexPak Lite provides high outputs in a very small footprint with six standard system configurations.
If you need a higher output or a different system configuration then please look our PhexPak range. PhexPak is built around a gasketed plate heat exchanger so we can match the performance to your exact needs.
Get in touch with our sales & support team and they can offer all the support you need to start designing a suitable PhexPak for your project.
Can't see what you want? Need help?
Call us. Or use Live Chat.
For instant advice. We can custom-design and engineer almost any expansion joint you need for delivery in the UK or worldwide. Call our expert team on +44 (0) 1384 881188 Or email us sales@flexej.co.uk
Frequently Asked Questions
A. A plate heat exchanger is a series of corrugated plates (usually stainless) placed in sequence to form a series of primary and secondary circuit channels that alternate throughout the plate pack.
A. A packaged plate heat exchanger starts life as a basic plate heat exchanger, it is then combined with control components such as a primary pump, control valve, temp sensor and various other optional extras. Do see FlexEJ’s range of fully-customisable PhexPak packaged plate heat exchangers with a wide range of power and flexibility options.
A. A gasketed plate heat exchanger uses soft gaskets to seal between the plates in the stack. The plates are compressed together between the end plates by long tie bolts. This arrangement is very flexible and allows the heat exchanger to be very closely optimised for the application. The stack can be dissembled for cleaning and may be reconfigured if conditions change. Do see FlexEJ’s range of fully-customisable PhexPak packaged gasketed plate heat exchangers with a wide range of power and flexibility options.
A. Plate heat exchangers work by forcing a medium through the small channels between the plates, causing the heat to be extracted from one circuit and transferred to the other.
A. Packaged plate heat exchangers manage and optimize the transfer of flow and heat by monitoring and reacting to a temperature sensor, usually placed on the secondary flow.
A. Phexpak is a fully modular and customizable product. It can be specified and designed to meet your exact requirements.
A. Hot water requirements for commercial projects are typically calculated using CIBSE guidance to meet the required standards. We utilise BS EN806 and BS 8558 to help our customers understand their requirements and can provide suitable product options to meet those requirements.
A. In a word, yes. A packaged plate heat exchanger is a great replacement for a calorifier for the vast majority of applications.
A. Not entirely, but it will significantly reduce the risk if installed to supply DHW instantaneously due to the vastly reduced volume of water in the system when the storage element is removed.
A. In a word, yes! Like our other products, the PhexPak is available to order directly from us. Just get in touch with our sales team to start the process.
A. Plate heat exchangers are one of the most efficient ways to transfer heat in the HVAC industry, in fact they are 99% efficient with only a 1% heat loss in most scenarios. Couple this with the most efficient pumps and control components available in today’s market and you have an unbeatable solution.
A. Packaged plate heat exchangers are typically installed freestanding in a plant room, and are connected via the 4 following connection points: Primary flow, Primary return, Secondary flow, and secondary return. Power is then supplied to the control panel and the unit is ready for commissioning and setup.
A. Packaged plate heat exchangers tend to cost more than standalone plate heat exchangers, but offer a wide range of benefits that a standalone plate heat exchanger simply can’t offer. They are also supplied with all the required pumps, valves and control components fitted to ensure optimum performance of the heat exchanger.
A. A calorifier is a storage buffer vessel that holds a body of water (most commonly DHW), and has an internal coil or similar heating element which circulates a primary heating circuit, designed to indirectly heat the body of water in the vessel.
Yes, the PhexPak is a great direct alternative to the Stokvis Econoplate packaged plate heat exchanger, which is no longer available. Please get in touch for help with your requirements or to request more info on the PhexPak.
A. Yes, please contact us with your product and project requirements and we will quote the PhexPak packaged plate heat exchanger.
A. Yes, please contact us with your product and project requirements and we will quote the PhexStore. PhexStore is a direct alternative to the Econostore, which is no longer available.
A. Yes, FlexEJ can quote and supply DHW buffer vessels from our standard range up to 1000l or bespoke design and manufacture anything larger.
A. Yes, FlexEJ can offer help and support either remotely or on site if required, utilising BSEN806 and BS8558 to determine DHW requirements.
A. Yes, FlexEJ can quote and supply a huge range of heat exchangers for DHW and LTHW applications.
A. FlexEJ can quote and supply a whole host of plantroom accessories, from product specific insulation jackets to full unvented system component kits. Please get in touch with your requirements.
A. Yes, in April 2024. Please contact FlexEJ for quotes and technical assistance on packaged plate heat exchangers, buffer vessels and hybrid buffers.
Yes, in April 2024. Please contact FlexEJ for quotes and technical assistance for all your packaged plate heat exchanger, buffer vessel and hybrid buffer requirements.
