Pressure vessels and air receivers for 11 bar
Pressure vessels and air receivers for a working pressure of 11 bar for compressors that cut out at no more than 10 bar — 50 vessels from 5 to 3000 litres. Vertical, horizontal with feet and small horizontal without feet; painted, hot-dip galvanised, with the ALM internal coating or in stainless steel; stand-alone or fully equipped with fittings.
There are more vessels for 11 bar than for any other pressure. All small vessels up to 50 l are rated for this pressure, the standard vessels from 100 to 720 l come in all six sizes for it, and so do almost all stainless steel vessels. You will find vessels for other pressures, further volumes and designs in our main category of pressure vessels and air receivers.
Five categories of 11-bar vessels
The 11-bar vessels come from five categories. The table shows their number, volumes and finish; the dimensions and connections are on the vessel product pages.
| Pressure vessels for 11 bar by category | ||||
|---|---|---|---|---|
| Category | Items | Volumes | Working pressure | Finish |
| Stainless vessels | 20 | 5–3000 l | 11 bar | stainless AISI304 or AISI316L |
| Small vessels up to 50 l | 13 | 5–50 l | 11 bar | paint, no coating |
| Vessels from 100 to 720 l | 11 | 100–720 l | 11 bar | paint, hot-dip zinc, ALM |
| Fully equipped vessels with fittings | 5 | 100–720 l | 11 bar | paint, hot-dip zinc |
| Oxygen vessels | 1 | 500 l | 11 bar | white RAL 9010 paint, ALM inside |
All stainless steel vessels are rated for 11 bar except the horizontal 10 and 15 l vessels, which have 12 bar. The 500 l oxygen vessel is the only oxygen vessel for 11 bar, and among the small vessels there is one horizontal 24 l vessel made of steel with no coating.
#showmore#
Which compressor an 11-bar vessel belongs with
The maximum pressure the compressor delivers into the vessel must not exceed the pressure on the vessel’s data plate. An 11-bar vessel is therefore suitable for compressors that cut out at no more than 10 bar, that is, for standard piston and screw compressors for 8 and 10 bar. A compressor that cuts out above 10 bar belongs with a 16-bar vessel.
The safety valve on the vessel must open at no more than 11 bar. In the fittings kits and on the fully equipped vessels, it is set to 10.5 bar: it opens before the pressure reaches the pressure on the data plate, and at the same time it lies above the cut-out pressure of a 10-bar compressor, so it does not blow off in normal operation.
Size, design and finish
Small vessels from 5 to 50 l are suitable as an air reserve at a machine or tool, downstream of a smaller compressor or in your own assembly. Vessels from 100 to 720 l serve as the main air receiver downstream of the compressor, and the stainless steel vessels go up to 3000 l. How to calculate the size from the compressor output and air demand is shown in our advice centre on choosing an air receiver.
A vertical vessel takes up the least floor space; a horizontal one with feet is low and fits under a lower ceiling or under a platform. Horizontal vessels without feet from 5 to 50 l are built into a frame, cabinet or machine.
Painted vessels have a blue RAL 5015 powder coating on the outside and bare steel inside, and they suit dry, heated rooms. Hot-dip galvanised vessels are protected inside and out and belong in damp conditions; for 11 bar, you will find them among the vertical vessels from 100 to 720 l and the horizontal vessels from 270 to 720 l. The ALM internal coating approved for contact with food is found on the 270, 500 and 720 l vessels. Stainless steel vessels in AISI304 or the more resistant AISI316L have no coating and can also take nitrogen and air with water.
Fittings kit or fully equipped vessel
A stand-alone vessel is delivered without fittings. For the vertical painted and galvanised vessels from 100 to 720 l, there are ready-made kits with a safety valve set to 10.5 bar, a pressure gauge, ball valves for the air inlet and outlet, a condensate drain valve and the mounting hardware: KVP for a painted and KVG for a galvanised vessel of the same volume. You will find them among our fittings kits and connecting hoses.
The fully equipped vessels from 100 to 720 l have the same fittings already mounted and come with TÜV certification of the pressure assembly, so all you need to do is set them up and connect them. For small and horizontal vessels, ALM-coated vessels and stainless steel vessels, the safety valve, pressure gauge and shut-off valves are chosen separately, and for the oxygen vessel only parts designed for oxygen.
Directives and inspections
The small, standard and fully equipped 11-bar vessels are manufactured to the SPVD Directive 2014/29/EU on simple pressure vessels, and the stainless steel vessels and the oxygen vessel to the PED Directive 2014/68/EU. All bear the CE marking and come with a declaration of conformity. How often they must be inspected depends on the vessel’s volume and pressure and is set by national regulations; an operator’s obligations in the Czech Republic are covered in our article on pressure vessels and the law.
Where next: higher pressures, volumes and finishes
Vessels for 12, 16, 32 and 42 bar, the two most common volumes in this listing, and pages where 11-bar vessels appear together with other pressures of the same design, finish or directive.
| Related pages | ||
|---|---|---|
| Page | What you will find | Items |
| Pressure vessels for 12 bar | mainly large vessels from 1000 to 10000 l, also rated down to −20 °C and for oxygen | 29 |
| Pressure vessels for 16 bar | for compressors that cut out above 10 bar | 19 |
| High-pressure vessels for 32 and 42 bar | vertical vessels from 100 to 5000 l for high-pressure compressors | — |
| Pressure vessels 24 l | small vertical and horizontal vessels, also stainless steel | 6 |
| Pressure vessels 500 l | the main air receiver downstream of the compressor, also for 16 bar, a vacuum vessel and an oxygen vessel | 13 |
| Horizontal vessels without feet | small vessels from 5 to 50 l for building in | 5 |
| Galvanised vessels | hot-dip galvanised vessels for damp conditions and KVG kits for them | 78 |
| Vessels with no coating | stainless AISI304 and AISI316L vessels and one 24 l steel vessel | 23 |
| Vessels to the Simple Pressure Vessels Directive (SPVD) | simple pressure vessels from 5 to 720 l for 11 and 16 bar | 33 |
Ventilek’s tip
A second vessel needs its own safety valve too. As soon as the additional vessel can be isolated from the compressor by a valve, the compressor’s safety valve no longer protects it.
- Which compressor is an 11-bar vessel suitable for?
- For a compressor that cuts out at no more than 10 bar, that is, for standard piston and screw compressors for 8 and 10 bar.
- My compressor cuts out above 10 bar. Is an 11-bar vessel enough?
- No, such a compressor belongs with a 16-bar vessel. The pressure on the vessel’s data plate must always be at least as high as the maximum pressure the compressor delivers into it.
- What should the safety valve be set to?
- No higher than 11 bar, that is, the pressure on the vessel’s data plate. The valve in the fittings kits and on the fully equipped vessels is set to 10.5 bar.
- Which 11-bar vessels have a ready-made fittings kit?
- The vertical painted and galvanised vessels from 100 to 720 l. A painted vessel takes a KVP kit, a galvanised one a KVG kit of the same volume.
- Are there stainless steel vessels for 11 bar too?
- Yes, vertical ones from 24 to 3000 l and horizontal ones from 5 to 1000 l, in AISI304 or AISI316L steel. Only the horizontal 10 and 15 l vessels are rated for 12 bar.
- Does an 11-bar vessel need regular inspections?
- Depending on its volume and pressure, yes. Which inspections a vessel needs, and how often, is set by national regulations.
We will be glad to help you choose — tell us the cut-out pressure of your compressor and how much air you use.
.jpg)
Product sorting
List of products
A vertical air receiver that fits even into a narrow corner of the workshop. It stands on legs, and you can feed air into it from above, from below or from the side.
The smallest air receiver for built-in use, a smooth cylinder without feet. You mount it with clamps in a frame, a cabinet or a small pneumatic device.
A horizontal air receiver for places where length is limited but a slightly wider vessel is no problem. Compared with the 10-litre version, it holds 50% more air at almost the...
The largest air receiver for built-in use in this category, with two top connections of the same size. It suits a machine frame or assembly that needs a large air reserve...
A 10-litre cylinder without feet for a machine frame or cabinet where feet would get in the way. It has a top connection for a pressure gauge or safety valve and a bottom one...
An air receiver for built-in use where length is limited: it holds 50% more air than the 10-litre version and is less than two centimetres longer. Without feet, it fits into a...
A small horizontal air receiver that already has a top connection for a pressure gauge or safety valve. It stands on two feet with bolt holes and fits under a workbench or on a...
An air receiver without feet, with the volume typical of small compressor tanks. It suits a custom assembly where the vessel is to lie in a frame, or serves as a built-in air...
A vertical air receiver with twice the air reserve of the 24-litre version, while still needing little floor space. The taller legs leave room under the bottom end for a...
A horizontal vessel on two feet, made of unpainted steel and sold as a clearance item. It suits applications where you finish the surface yourself, for example in the same...
The largest of the small horizontal air receivers, with two top connections, so you can fit both the safety valve and the pressure gauge without branch fittings. It suits a...
The smallest air receiver with feet, both with bolt holes. It fits on a shelf, in a crate or under a workbench and serves as a small air reserve or a buffer volume.
A horizontal air receiver with the volume typical of small compressor tanks. Placed next to the compressor, it doubles the air reserve, so the machine starts less often.
