Export only · Manufacturing and exporting LPG vacuum pumps since 2003
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LPG guide
How to transfer LPG from a big cylinder to a small one.
How to fill small gas cylinders from a large one with a transfer pump, safely and without overfilling.
What you need
- A full large cylinder and the small cylinders you want to fill.
- A transfer pump. The 220V AC pump plugs into a normal socket; in 110V countries use the 12V DC pump on a car battery, or the manual pump where there is no electricity.
- The valve connectors used on cylinders in your country.
- A scale to weigh the small cylinder while it fills.
- An open, well-ventilated space away from flames and sparks.
Step by step
- Only from big to smallThese pumps move gas from a larger cylinder into a smaller one. Filling a bigger cylinder from a smaller one needs a higher-pressure pump.
- Turn the big cylinder upside downThis brings the liquid to the outlet. Keep the small cylinder upright on the scale.
- Note the weight to stop atMost cylinders are stamped with their empty (tare) weight and the weight of gas they hold. Add the two: that is the full weight. Never fill beyond it.
- Connect and tightenConnect the big cylinder to the pump inlet and the pump outlet to the small cylinder. Tighten every thread before opening a valve.
- Open the valves and pumpOpen the valves and start the pump. It moves about 2 kg a minute. Watch the scale.
- Stop at the full weightSwitch off and close the valves when the scale reaches the full weight. Disconnect only after the valves are closed, then check the joints for leaks with soapy water.
Do not overfill. A cylinder needs space for the gas to expand when it warms up, so fill by weight and never past the full weight stamped on the cylinder. Rules for transferring LPG between cylinders and cars are different in every country. Please check the rules where you live before you start. We export only and do not sell these pumps in India.
Common questions
Can I fill a big cylinder from a small one?
Not with these pumps. They move gas from a larger cylinder to a smaller one; the other way round needs a higher-pressure pump.
How fast is it?
About 2 kg of gas per minute with the 12V or 220V pump.
Which pump should I choose for refilling all day?
For a business filling cylinders all day, the 1 HP commercial pump or the 1 HP belt-drive pump is made for heavy use.
Why turn the big cylinder upside down?
LPG is moved as a liquid. Upside down, the liquid reaches the outlet, so the transfer is fast and complete.
Choose a pump for cylinder filling.
The 220V AC pump is 7 kg packed and plugs into any 220V socket. Message us for one total price, pump and shipping together.