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• For use in Domestic Properties
• For use with solid fuel appliances
Buffer vessels are basically cylinders, which do not supply hot water to any taps or draw off points. Their function is to receive heat from one or more heat sources and store that heat to be used as part of another non-potable plumbing system, on demand – for example, the heat energy produced by a heat pump could be stored in a buffer vessel, and then that heat drawn off, as necessary, to provide heat to an under-floor heating system.
Another use of an open vented buffer vessel is to allow an uncontrollable heat source such as a solid fuel stove to heat an unvented cylinder without having to use extensive safety precautions. Heating an unvented cylinder via an uncontrollable heat source is not normally advised, but as the buffer vessel is open to the atmosphere the heated water is able to expand to the feed and expansion tank. This allows the user to safely control how much heat is being fed into the main unvented cylinder via the use of control stats and motorized valves.
Buffer Vessels are available as vented, or pressurised units and can either be direct (no heat input coils) or indirect (one or more heat input coils). Each unit can come complete with immersion heater(s) if necessary.
As with all of our products, there is also the option for the customer to specify exactly what heat input(s) and output(s) they would like their buffer vessel to be able to use, for example, solar, heat pump, gas/oil boiler, solid fuel stove, under floor heating circuit, radiator circuit, etc.
Matching customers' requirements is particularly important when space is at a premium, so the most common customisation for a hot water cylinder, is the “mixing and matching” of the various heights and diameters that we offer. As additional parts of a Bespoke design, the customer is able to specify a number of options including coil sizes (where applicable), connection sizes/positions, insulation thickness, whether it is manufactured from copper, stainless steel or (if direct) mild steel (see our Copper vs. Stainless Steel page for a comparison), and the finish of the unit (the silver metal case being the premium option). It is also possible to combine different types of cylinders to result in the optimum solution for your individual situation. We can offer design drawings prior to manufacture to ensure that all connection sizes, positions and functions are to the customer's requirements.
See our Bespoke Products page if you require a unit which may be slightly out of the ordinary and please contact us if you require any advice.
Buffer Vessels are available in a range of heights (from 600mm to 2000mm) and to the specific diameters listed below.
|750||450||100||Mild Steel, Stainless Steel, Copper|
|1050||375||100||Stainless Steel, Copper|
|1200||375||120||Stainless Steel, Copper|
|900||450||120||Stainless Steel, Copper|
|1000||450||140||Mild Steel, Copper|
|1500||375||150||Stainless Steel, Copper|
|1100||450||150||Stainless Steel, Copper|
|1300||450||180||Mild Steel, Stainless Steel, Copper|
|1800||375||180||Stainless Steel, Copper|
|1400||450||200||Stainless Steel, Copper|
|1200||500||220||Mild Steel, Copper|
|1500||500||250||Mild Steel, Stainless Steel, Copper|
|1700||450||250||Stainless Steel, Copper|
|1700||500||300||Mild Steel, Copper|
|2000||450||300||Stainless Steel, Copper|
|1800||500||300||Stainless Steel, Copper|
|2000||500||350||Mild Steel, Stainless Steel, Copper|
|1600||600||400||Mild Steel, Stainless Steel, Copper|
|1800||600||460||Mild Steel, Stainless Steel, Copper|
|2000||600||500||Mild Steel, Stainless Steel, Copper|
|1750||675||550||Mild Steel, Copper|
|1900||675||600||Mild Steel, Copper|
|1800||750||700||Mild Steel, Copper|
|2000||750||800||Mild Steel, Copper|
|1750||900||1000||Mild Steel, Copper|
|2100||900||1200||Mild Steel, Copper|
|2300||900||1350||Mild Steel, Copper|
Copper Grading Options
Relative to pressure.
Maximum Working Head
Relative to Pressure.
Coil Heating Surface (Indirect)
Relative to Size or Customer Requirements
Coil Working Pressure (Indirect)
50mm to 80mm
Standing Heat Loss
Relative to Size and Insulation Thickness
Shell Connection Sizes Available
1/2", 3/4", 1", 1 1/4", 1 1/2", 2", 15mm, 22mm, 28mm
3/4", 1", 1 1/4", 1 1/2", 2", 22mm, 28mm
Coil Connection Sizes Available
To assist with determining the correct size connection for replacement units or units to fit your current system, we have created a table of external and internal thread sizes.
Uninsulated Diameter Calculator
This calculator is designed to assist the specification of a cylinder by determining the amount of hot water available from a cylinder of a specific size; this can be particularly useful in situations where space for a cylinder is limited.
This calculator is designed to assist the specification of a cylinder by determining the size of the cylinder from it's circumference and insulation thickness; this can be particularly useful in situations where a replacement cylinder is required, but due to the insulation it is difficult to determine the size of cylinder required.
Please note - The final figures are approximate and should be rounded to the nearest standard diameter (375,400,450 etc.)
PRODUCT OPTIONS & UPGRADES
SIZE & SPECIFICATION
Northern Road Industrial Estate
Tel: 01636 678 437
Fax: 01636 678 964
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