Prevents short-cycling
A boiler or chiller starts and stops frequently when it cannot cover the load with too little water volume; a buffer tank breaks this cycle by increasing the system's volume.
Product group · Pressure Vessels
Buffer Tanks
Buffer tanks increase the system's water volume to prevent the boiler or chiller from starting and stopping frequently (short-cycling); this extends equipment life and reduces temperature swings. We supply buffer tanks for heating and cooling circuits, including multi-port models that can also act as a hydraulic separator.
Volume200 – 5000 L
Operating pressure3 – 10 bar
CircuitHeating / cooling
ConnectionsMulti-port, hydraulic-separator compatible
Why it matters
What does a buffer tank do?
It increases the system's water volume to prevent the heat source or chiller from starting and stopping frequently.
Extends equipment life
Frequent start-stop cycling is the biggest cause of fatigue for compressors and burners; a buffer tank reduces the number of cycles and extends equipment life.
Reduces temperature swings
The added water volume makes temperature change more slowly during sudden load swings, improving comfort and process stability.
Can also act as a hydraulic separator
Multi-port models hydraulically separate the boiler/chiller circuit from the installation circuit, preventing the pumps from affecting each other.
Types
Sub-types of buffer tanks
All three increase the system's water volume; what sets them apart is the circuit type and connection layout.
Heating circuit buffer tank
The standard solution for preventing short-cycling in boiler and heat pump circuits; often used together with underfloor heating systems.
- Boiler/heat pump compatible
- Suited to underfloor heating
- Economical solution
Cooling circuit buffer tank
Prevents the compressor from cycling on frequently in chiller circuits; plays a critical role especially in systems running at low loads.
- Chiller-circuit compatible
- Protects compressor life
- Stable at low loads
Multi-port (hydraulic separator) buffer tank
Hydraulically separates the boiler/chiller from the installation circuit while also acting as a buffer; preferred in multi-pump systems.
- Hydraulic separator function
- Suited to multi-pump systems
- Two functions in one shell
Selection criteria
What data determines the right buffer tank?
Selection cannot be made without the first two items. The rest determine the connection layout and fittings.
ParameterWhy it mattersWhat we need from you
Volume
Calculated from the heat source's minimum capacity and the system's load profile.
L
Circuit type
Whether it will be used for heating, cooling, or both.
Heating / cooling
Number of connections
A single inlet/outlet, or a multi-port version that also acts as a hydraulic separator.
2-port / multi-port
Operating pressure
Must match the system supply pressure.
bar
Insulation
Determined by the heat loss/gain tolerance.
mm
Connection size and installation location
Inlet/outlet ports and the boiler room layout.
DN size + installation clearance
For a quote, having the following is enough
It's fine if you don't have all of it. We'll fill in the gaps together with you.
Create a quote request- The heat source's minimum/maximum capacity
- Circuit type (heating/cooling)
- The volume you want, or a short-cycling complaint
- Whether a hydraulic separator function is needed
- Operating pressure
- Installation location and existing installation sizes
FAQ
Questions from the field
The questions we hear most often when quoting buffer tanks.
What is short-cycling, and why is it harmful?
It is when the heat source starts and stops frequently because of insufficient water volume; every start-stop cycle shows up as mechanical fatigue and lost efficiency in the equipment.
Are a buffer tank and a hydraulic separator the same thing?
They are often combined in the same shell. The buffer function focuses on adding volume, while the hydraulic separator function decouples the flow of the two circuits from each other; multi-port models provide both.
How is volume calculated?
It is calculated from the heat source's minimum capacity, the system's instantaneous load swings and the desired cycling frequency; we can also give an approximate figure without a site survey.
Can heating and cooling be combined in the same tank?
It is technically possible, but a separate tank is usually preferred; mixing the two circuits in the same tank can make temperature control harder.
Do you only serve Istanbul?
No. While our office is on Istanbul's Anatolian side (Ataşehir), we supply and ship across Istanbul's European side, the surrounding provinces and the Marmara region, and Turkey as a whole — covering your equipment end to end, from a single source.
Next step
Let's clarify your needs together
Share your heat source's capacity and your short-cycling complaint, and let's determine the right buffer tank for your system together.
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