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You are here: Home1 / Blog2 / LPG Leisure Time3 / Gas Regulator, Gas Cylinder & more4 / There is a hissing sound at the pressure regulator when I open the shut-off...

There is a hissing sound at the pressure regulator when I open the shut-off valve. Does that mean that gas is escaping?

5. March 2018/in Gas Regulator, Gas Cylinder & more, Gas Regulator, Gas Cylinder & more, LPG Everyday, LPG Leisure Time

Inhaltsverzeichnis

  • Air displacement
  • Video evidence
  • Pay attention to the smell
  • Hissing on all pressure regulators
Approximate reading time: 2 minutes

Summer. Sunshine. Barbecue weather. You connect the pressure regulator/pressure reducer to the LPG cylinder and connect it to the gas barbecue using the hose assembly. You are already imagining the steaks sizzling away on the grill. The wonderful aromas of roasting meat and vegetables are already in the air and your mouth is starting to water. You open the gas cylinder valve and hear a hissing sound. Does this mean you need to cancel your barbecue because the pressure regulator might have a leak?

First of all: No! You don’t need to worry if there is a brief hissing sound when you open the gas cylinder valve. This is completely normal and even important for the LPG system to function at its best. Why? We’re about to tell you.

Air displacement

Pressure regulators from GOK have a something called a vent hole. When non-pressurised, meaning when the gas cylinder valve is closed, the diaphragm of the pressure regulator is in the neutral position. Now, when you open the gas cylinder valve, the diaphragm in the housing moves towards the vent hole and reduces the volume in the cap. Part of the air escapes to the outside through this vent hole.

Jeder Druckregler, der an 5, 11 oder 33 Kilogramm-Gasflaschen angeschlossen wird, verfügt über eine Entlüftungsbohrung. Über diese entweicht beim Öffnen des Gasflaschenventils Luft nach außen, gut hörbar durch ein markantes Zischen.

Every pressure regulator which is connected to 5, 11 or 33-kilogram gas cylinders has a vent hole. This is where air escapes from when you open the gas cylinder valve, and you can hear it by the striking hissing sound.

Video evidence

The hissing sound that you hear when you open the shut-off valve of the propane gas cylinder is therefore not due to gas escaping from the pressure regulator. Here’s a video to give an example for a few pressure regulator models, this visualises how the air escapes:

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Pay attention to the smell

By the way: If you do have a dangerous leak in your LPG system, you would notice an unpleasant smell. LPG has odour added to it which smells like rotten eggs.

  What should I be aware of when transporting LPG cylinders in my own vehicle?

As this isn’t the case here, there’s nothing to prevent you from hosting your barbecue. Once you have performed a simplified leak test for the whole LPG system, you can start putting your food on the barbecue without a care.

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Hissing on all pressure regulators

In the end, it doesn’t matter whether it’s an LPG system, a gas-powered barbecue, gas stove, heater or heating mushroom. All pressure regulators which connect to a gas cylinder have a vent hole and you will hear the classic hissing sound shortly after you have opened the gas cylinder valve.

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https://www.gok-blog.de/wp-content/uploads/2018/03/Titelbild-Regler-Zischen.jpg 375 675 GOK Media https://www.gok-blog.de//wp-content/uploads/2020/10/GOK-BLOG-Logo.svg GOK Media2018-03-05 07:00:452022-04-14 08:39:49There is a hissing sound at the pressure regulator when I open the shut-off valve. Does that mean that gas is escaping?
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2 replies

Trackbacks & Pingbacks

  1. Rushing Air Sound When Accelerating – brujasdeaskani says:
    7. June 2022 at 8:09

    […] You don't need to worry if there is a brief hissing sound when you open the gas cylinder valve. This is completely normal and even important for the LPG system to function at its best. via […]

  2. Rushing Air Sound When Accelerating – suluovagazete says:
    3. June 2022 at 23:49

    […] You don't need to worry if there is a brief hissing sound when you open the gas cylinder valve. This is completely normal and even important for the LPG system to function at its best. via […]

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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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