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You are here: Home1 / Blog2 / LPG Leisure Time3 / Gas Regulator, Gas Cylinder & more4 / How do I check a system with the pressure regulator pressure gauge for...

How do I check a system with the pressure regulator pressure gauge for leak-tightness?

12. November 2018/in Gas Regulator, Gas Cylinder & more, Gas Regulator, Gas Cylinder & more, General, LPG Everyday, LPG Knowledge, LPG Leisure Time

Inhaltsverzeichnis

  • Example scenario
  • Leak test with pressure gauge and red pointer
  • Black and red pointer?
  • Larger deviation? Leak detection!
  • Leak check with pressure gauge without red pointer
Approximate reading time: 3 minutes

Some people incorrectly view the pressure gauge on the pressure regulator as a gas cylinder filling level indicator. But it definitely isn’t. First and foremost, it is intended to reliably indicate the pressure present in the gas cylinder. If the pressure gauge has two pointers, a black one and a red one, the user can also make using their LPG system safe very easily and quickly.

Quickly checking the entire system for leaks without high-quality technical equipment in an absolutely straightforward manner, and while doing something else in the meantime. Does this sound unrealistic? But it’s true, thanks to a pressure gauge integrated into the pressure regulator. We’re going to do this in the following scenario:

Example scenario

The garden party is in full swing, however the sun has gone down and it will become considerably chillier in the next hour. While the host is still grilling the last steaks on the gas barbecue, his wife is already connecting the gas cylinder to the patio heater.

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Leak test with pressure gauge and red pointer

With a maximum of three additional movements, she checks for leaks in the entire LPG system at the patio heater and can still eat her steak in the meantime. We show you exactly how it works:

  1. Close all shut-off fittings on the patio heater
  2. Slowly open the valve on the gas cylinder
  3. Turn the inspection glass of the pressure gauge with the printed red pointer to the exact same position as the black pointer. The black pointer marks the actual pressure
  4. Close the gas cylinder valve again and wait for two minutes to allow any temperature equalisation to take place ⇒ Use the time to load your plate with steak and salad
  5. If necessary, adjust the red pointer to the changed position of the black pointer
  6. Then keep the test time of ten minutes ⇒ Use the time to enjoy your food
  Does the pressure regulator gauge show the filling level of the LPG cylinder?

Black and red pointer?

Die Dichtheitsprüfung einer Flüssiggasanlage lässt sich dank Manometer mit rotem Zeiger schnell und einfach durchführen.

The leak check can be carried out thanks to the pressure gauge with its red pointer.

We may have to explain one or two things in a little more detail. On 3: The pressure gauge has a black pointer which shows the actual pressure in the gas cylinder. The red pointer, on the other hand, can be changed manually, as it is printed on the pressure gauge inspection glass. It can be rotated to the exact same position as the black pointer.

On 4:

The LPG is now enclosed in the system to a certain degree. However, due to the ambient temperature or strong sunlight, you should wait for two minutes to allow the temperature equalisation in the gas to take place.

Larger deviation? Leak detection!

If, within these two minutes, the black pointer drifts away from the red pointer due to temperature differences, simply return the red pointer to the position of the black one (on 5).

  How do I carry out a simplified leak check on an LPG cylinder system?

If the red and black pointers are still in the same position after ten minutes, the system is completely sealed and ready for use. In case of a larger deviation, you should repeat the leak check or look for the leaky connection directly using leak detector spray.

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Leak check with pressure gauge without red pointer

Incidentally, the LPG system can also be checked for leaks if the pressure gauge only has a black pointer:

  1. Close all shut-off fittings on the patio heater
  2. Slowly open the valve on the gas cylinder
  3. Manually mark the position of the black pointer (display of the current cylinder pressure)
  4. Close the gas cylinder valve again and wait for two minutes to allow any temperature equalisation to take place
  5. If necessary, adjust the manual marking to the changed position of the black pointer
  6. Then adhere to the test time of ten minutes
  Is it mandatory to have a gas anti-tilt device for outdoor heaters, patio heaters and radiant heaters?
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Approximate reading time: 8 minutes

Information regarding technical systems

This blog will never ask members of the public or unqualified persons to make changes to or fiddle around with technical systems themselves.

In accordance with the Industrial Safety Regulation (BetrSichV), a qualified person must take care of a system which requires monitoring.

A qualified person is someone who has the specific specialist knowledge required. This knowledge is gained by way of a professional apprenticeship, corresponding professional experience or current occupational activity.

Please note that the texts are based on information, regulations and standards for Germany. Please always check the rules and regulations in the relevant country of destination and consult specialists if necessary.

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