300 bar compressor buying guide
Updated: 21.10.2026
You have a PCP rifle and a stirrup pump that gets heavy past about 150 bar, and the amazon.co.uk title in front of you says 300 bar. This buying guide is the check before the product cards: the socket, the way the pump stops, the cooling, and whether your bottle is the size these machines are sold for. A 300 bar compressor in this set is a portable high-pressure pump, not an 8 bar workshop compressor and not breathing air. The eight listings we kept on 19 October 2026 run from £132 to £259. Prices sit on the [300 bar compressor comparison](/hub/compressors/300-bar-compressor).
You have a PCP rifle and a stirrup pump that gets heavy past about 150 bar, and the amazon.co.uk title in front of you says 300 bar.
You have a PCP rifle and a stirrup pump that gets heavy past about 150 bar, and the amazon.co.uk title in front of you says 300 bar. This buying guide is the check before the product cards: the socket, the way the pump stops, the cooling, and whether your bottle is the size these machines are sold for. A 300 bar compressor in this set is a portable high-pressure pump, not an 8 bar workshop compressor and not breathing air. The eight listings we kept on 19 October 2026 run from £132 to £259. Prices sit on the 300 bar compressor comparison.
Our top picks
| Badge | Product | Mains voltage | How it stops | Cooling | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  SDKEHUI SDKEHUI 350 W 12 V and 230 V PCP compressor | 230 V in the table | Auto-stop stated | Fan, 10 kg | 6.1 | about £220.15 | View offer |
| Preis-Tipp |  TUXING TUXING TXES061 4500 psi PCP air compressor | 110 V in the table | No switch, no auto-stop | Air-cooled, 7 kg | 7.1 | about £152.99 | View offer |
 TUXING TUXING TXES062 vertical wire-spool PCP compressor | 220 V in the table | Needle on the gauge | Fan, 8.5 kg | 8.2 | about £169 | View offer |
On this page
What you are actually buying
300 bar is 30 MPa, about 4,350 psi. A title that says 4,500 psi is the same class of pump, roughly 310 bar, not a bigger machine. Many PCP rifles are filled somewhere around 180–232 bar. BSA’s R12 manual states a maximum of 232 bar, so the number on the pump is a ceiling you should not treat as the fill. The pumps in this comparison are mostly fan-cooled units of about 250–350 W and 5–10 kg, from TUXING, SDKEHUI and TUDIVING.
A half-litre rifle cylinder, topped from 100 bar toward 200 bar, is the job those wattages are described for. A 7 litre cylinder from empty is not. Sellers often talk about 0.5–1 litre. The £259 dual-cylinder listing mentions filling 2 litres, next to a 110 V field, so treat that bottle line as a seller sentence until you have read the live page. One listing, the TUXING TXES022 at £179, is water-cooled, stated at 1,800 W and 16 kg, with only six ratings. Shop compressors outside this set, around £390–£980, are a different purchase.
Mains, plugs and 12 V
UK mains are 230 V, and a domestic plug should be a BS 1363 plug under the Plugs and Sockets (Safety) Regulations 1994. An adaptor changes the pin shape. It does not turn 110 V into 230 V. Four kept listings show 110 V in the specification table while the bullets mention 220 V, 12 V, or a converter: the £152.99 TUXING TXES061, the £259 TXEDB062, the £179.90 TXES062, and the £139 TUDIVING. A UK reviewer of the £259 model wrote that it needs a 240 V to 110 V transformer. Confirm the live amazon.co.uk page before you pay, because the table and the bullets in this set often disagree.
The clearer mains lines are the £169 TUXING, whose table says 220 V, and the £220.15 SDKEHUI, whose table says 230 V. Neither line proves the plug is genuine. On 12 V, bullets that state about 40–42 A are describing battery clamps, not a cigarette-lighter socket, and you should not connect mains and 12 V at the same time. The Office for Product Safety and Standards has recalled other PCP compressors, including a Vevor unit, for counterfeit plugs and shock. That recall is not a finding about these three brands. It is the reason you look at the plug, the fuse and the earth.
Cooling, oil and shut-off
Most of these pumps are described as oil-free, with a fan and no external water pump. They still get hot. A UK review of the £132 SDKEHUI said the case was too hot to touch within two minutes. That is one review, not a duty-cycle test, so you follow the unit in your hand. The water-cooled TUXING TXES022 includes a pump and a hose, lists automatic shut-off, and a bullet says it can take VG46 oil. At 16 kg and 4.5 from six ratings, it stays a shortlist item rather than a settled pick.
Auto-stop is only real if the control is on the machine. The £132 title says manual-stop. A UK review of the £139 TUDIVING says the preset in the advert was not fitted, so you watch the gauge. On the £169 TUXING, a reviewer says you set a needle on the analogue gauge and the display shows temperature only. If you buy a manual-stop pump, you stay in the room for the whole run. A separator in the box catches oil and water mist. It does not make the air fit to breathe.
Bottle size and breathing air
An 8 mm quick connector is common on these listings and may still need a probe for your rifle. A UK review of the £152.99 TUXING said the whip did not fit an Air Arms S410 without an adaptor and thread tape, so budget for the fitting as well as the pump. Ignore the airflow field of 30 cubic metres per minute on the £259 listing. That figure does not belong to an 800 W pump.
Breathing air is a different machine. BS EN 12021:2014, summarised by the Health and Safety Executive in DVIS 9, is the standard for air you breathe. None of these listings is that standard. A TUXING bullet that mentions an external carbon filter for scuba bottles also says the filter is not included. At work, the Pressure Systems Safety Regulations 2000 drop written-scheme duties when every non-steam vessel is under 250 bar litres. A 0.5 litre bottle at 200 bar is 100 bar litres. A 2 litre bottle at 300 bar is 600 bar litres. Home hobby use is not automatically work. The rifle’s own limit is on the PCP air rifle page.
A short decision
Entry price here is about £132–£153: the SDKEHUI at £132, the TUDIVING at £139, and the TUXING TXES061 at £152.99. The £132 listing has 220 V in the table and also has UK reviews of a blown gauge and exposed live parts, so the low price is not a reason to skip those reviews. Mid price is about £169–£220. The £169 TUXING is the fan-cooled listing whose table already says 220 V. The £259 dual-cylinder unit is the top of this set, with a 110 V field and a thin UK file. Named skips are on the best 300 bar compressor page.
Products Compared read the amazon.co.uk listings and the public UK sources named below. We did not run a lab test. A qualifying purchase through our links can earn a commission at no extra cost to you. If the bottle is a small rifle cylinder, you will stay in the room, and the live page confirms a voltage you can plug in, a fan-cooled pump in that mid band is the usual shortlist. If you need breathing air, a large cylinder from empty, or you will not check a 110 V line, none of these eight is the right buy.
Common questions
Is 4,500 psi the same as 300 bar?
4,500 psi is about 310 bar, and 300 bar is about 4,350 psi, so a title that uses either figure is claiming the same class of high-pressure pump. It is not a promise that your bottle will finish at that pressure. Rifle manuals often stop near 200–232 bar. Read the rifle or the bottle, then set the pump below that limit. A review that stalls near 3,000 psi is describing about 207 bar, which is a different result from the title.
Why does the listing say 110 V if I have UK mains?
The specification table and the bullets in this set often disagree. Four of the eight kept listings show 110 V in the table. A UK reviewer of the £259 TUXING said a 240 V to 110 V transformer was required. A travel adaptor does not convert voltage. Open the live amazon.co.uk page and match the input to 230 V before you pay. If the page still says 110 V only, treat that as a UK buying problem.
Can I run a 300 bar compressor from the car socket?
A cigarette-lighter socket is the wrong source when the listing talks about 40–42 A. That current is a battery-clamp claim, and a lighter socket is not built for it. Do not connect the mains lead and the 12 V lead at the same time. If you do use clamps, follow the listing for that ASIN and keep the pump where you can see the gauge. The mains voltage check still applies to the other lead in the box.
Should I buy oil-free or water-cooled?
The fan-cooled oil-free units are the bulk of this set, at about 5–10 kg and 250–350 W. They need a rest, and you stay with them because several are manual-stop or only partly automatic. The water-cooled TUXING TXES022 at £179 includes a pump and hose, lists 220 V and 1,800 W, and a bullet mentions VG46 oil. It weighs 16 kg and has six ratings. Choose it only if you want that cooling method and you accept a tiny sample.
Will one of these fill a 7 litre cylinder?
These listings are aimed at rifle cylinders and small bottles, often described by sellers as about 0.5–1 litre. A 7 litre cylinder from empty is a different job, and a long fill on a small fan-cooled pump is how cases overheat. One dual-cylinder bullet mentions 2 litres, beside a 110 V field. If the cylinder is large, out of test, or for breathing, use a filler who handles that work. Do not start from the 300 bar title alone.
Is the air safe to breathe?
No. These listings are not BS EN 12021 breathing-air compressors. A separator in the box is there for oil and water mist, not for air you inhale. A scuba bullet that asks for an external carbon filter also says the filter is not supplied. The Health and Safety Executive’s DVIS 9 is the public pointer to the breathing-air standard. If the bottle is for diving or breathing apparatus, this comparison is the wrong shelf.
When does a written scheme of examination matter?
The Pressure Systems Safety Regulations 2000 apply at work. Written-scheme duties fall away when every non-steam vessel is under 250 bar litres. A 0.5 litre bottle at 200 bar is under that line. A 2 litre bottle at 300 bar is over it. Filling a rifle at home is not automatically a work activity, and the regulation is not a reason to skip the gauge. If you are unsure whether a club or a workplace cylinder is in scope, ask the person who owns the written scheme.
Related pages
Sources
Public UK sources listed below. amazon.co.uk listings for these eight ASINs were captured in October 2026.
- Pressure Systems Safety Regulations 2000, Schedule 1 (retrieved 19 October 2026)
- HSE INDG178: written schemes of examination (retrieved 19 October 2026)
- Plugs and Sockets (Safety) Regulations 1994 (retrieved 19 October 2026)
- OPSS product recall: Vevor PCP air compressor 2208-0358 (retrieved 19 October 2026)
- Firearms (Dangerous Air Weapons) Rules 1969 (retrieved 19 October 2026)
- Home Office firearms licensing guide, September 2026 (retrieved 19 October 2026)
- HSE DVIS 9: breathing air and BS EN 12021 (retrieved 19 October 2026)
- BSA R12 PCP rifle instructions (retrieved 19 October 2026)