Products & Services | Linde Gas Benelux

Equipment

Is my pressure regulator suitable for all types of gases?
No, pressure regulators are only interchangeable with nitrogen, argon, helium (inert and with similar connection). However, they should be flushed before being used. For all other gasses we do not recommend to exchange pressure regulators.

Can I clean a pressure regulator by myself?
Flushing with (nitrogen) gas is possible. However, do not use any liquids! If the pressure regulator has become contaminated, for example with oil, it must be returned to the supplier.

How can I flush my regulator?
The pressure build-up method is the preferred way to flush effectively. Rinsing works as follows:

- Bring the system to a pressure of about 3 bar
- Let the system condition for a few minutes
- Let the pressure drop to about 1,5 bar
- Repeat this operation 5 to 9 times, depending on the purity to be achieved

Pressure regulators with type indication hv can also be vacuumed to make flushing even more effective.

How often should I have my pressure regulators serviced?
Preferably once every 2 years for inert gases, and once a year for corrosive gases

Is there a maintenance service available for pressure regulators?
Yes, you can request a quote for the maintenance costs. In some cases the purchase of a new pressure regulator is cheaper.

Does Linde have maintenance subscriptions?
No, at this time Linde does not offer maintenance subscriptions for pressure regulators.

Can Linde deliver any primary connection?
Yes, primary connections are available. Additional costs may be incurred if connections deviate from the standard repertoire. As standard we supply connections according to NEN 3268 or DIN 477.

I have the wrong connection on my pressure regulator, can I replace it myself?
We strongly advise against this for safety reasons. The guarantee will then also be in question! The valve can only be replaced if the customer has sufficient expertise.

What secondary connections are available?
Hose barb, only for inert gases or inert gas mixtures with a maximum output pressure of around 6 bar. The connection should be secured with a hose clamp. When using hoses, it is important to know whether the material is suitable.

Does Linde also have sealing rings?
Yes, one piece will be delivered free of charge. In case more sealing rings are needed, these will be charged to you. For inert gases we use Delrin rings, for corrosive gases we use Kel-F rings.

Does Linde also have pressure regulators with a flush connection?
Yes, both for the high pressure side and the low pressure side. This is especially important for corrosive gases, 6.0 gases and gas mixtures with critical impurities such as moisture, oxygen and hydrocarbons.

For which gases is a flush connection desirable?
With gases of a purity of 6.0, a flush connection on the low pressure side is sufficient. With corrosive gases and gas mixtures, a flush connection on both the high pressure side and the low pressure side is desirable.

What types of pressure regulators does Linde have for specialty gases?
Two product lines are available: REDLINE and BASELINE. BASELINE is suitable for inert gases and gas mixtures up to 5.0 grade. REDLINE is suitable for pure gases from 5.0 grade upwards, corrosive gases and gas mixtures in the ppm range.

What is the leakage rate of our pressure regulators?
The leakage rate of both the BASELINE and REDLINE pressure regulators is at least 10-8 mbar l/s. This is approximately equivalent to 10-8 ml/s.

What is the difference between a one stage and second stage pressure regulator?
In a single-stage regulator, the secondary pressure slowly increases as the amount of gas in the cylinder decreases and therefore the flow changes. If the flow needs to be constant, a second stage regulator is needed. The pressure is then reduced in two steps. With liquefied gases the pressure remains practically the same, as there is still liquid in it. In that case a second stage pressure regulator is not needed.

Can I read the flow on a pressure regulator?
No, you need a flow meter (e.g. a flow tube). There are two types of flow meters: indicative or calibrated.

What is the maximum flow I can maintain for liquid compacted gases?
As a rule, a quantity of 1 kg per hour is used. For larger quantities, special measures must be taken, because the evaporation of the liquid makes it colder and therefore the pressure drops. There are the following solutions for this:

- More cylinders need to be connected
- Heat the cylinder with a heating jacket (not warmer than 50 degrees Celsius!)
- Combining the removal of liquid with an evaporator

GENIE cylinders

Is a GENIE cylinder as robust as a steel cylinder?
GENIE cylinders have passed all the same tests as those for steel cylinders making them as safe as the steel cylinders you normally use.

Why is the GENIE cylinder more stable?
The diameter of 320 mm gives the cylinder more stability so it is less likely to topple over.

How does the Digital Intelligence Unit (DIU) get the information from the cylinder?
There is a special temperature and pressure sensor fitted into the pressure vessel which transmits data to the processing unit in the DIU. The DIU uses a series of complex formulae to calculate and display the contents of the cylinder.

How do I use the Digital Intelligence Unit (DIU)?
Instructions are available in the user manual

Does a normal regulator fit within the handle area?
No, existing regulators are too big to fit within the space between the handles of the GENIE cylinder. GENIE regulators are compact versions of the larger regulators and are specifically designed to match the GENIE cylinder. The small size of the GENIE regulator means it remains contained within the handle area, so the regulator will not get damaged if the cylinder falls over.

Do the GENIE regulators fit on the current steel cylinders?
GENIE regulators will fit normal 300-bar steel cylinders. These regulators will not fit lower pressure-rated cylinders, for example 200-bar, because the inlet thread differs in accordance with international standards.

Does the cylinder fit on the back of a welding machine?
No, the diameter of the GENIE cylinder is normally too large to allow it to fit onto new welding machines but this isn’t an issue. Steel cylinders are too large and heavy to be used on a welding machine anyway and many leg and foot injuries occur with people trying to lift a cylinder and then lose control or move a welding machine only to have it fall over. The mobile nature of the GENIE cylinder means it can be moved much more easily without having to fix it to the welding machine.

DIGIGAS

What is DIGIGAS® ?
DIGIGAS® is a gas management system with which you can monitor the actual contents of your gas cylinders at any time of the day via a digital dashboard. You screw our smart sensor on the regulator or the cylinder centre and you attach the repeater (receiver) to the wall. Then you scan the QR code on the smart sensor and enter the cylinder data. You can then view the gas content of the cylinders in the digital dashboard.

For which gases can I use DIGIGAS®?
DIGIGAS® can be used for almost all standard industrial and special gases. At present DIGIGAS® cannot be used for propane cylinders. For gases that are liquefied under pressure DIGAS® can only be installed after consultation with our technical service department. For customized special gases currently only the service package DIGIGAS® Notify can be used.

Can I also use DIGIGAS® for flammable gases?
Yes, DIGIGAS® can be used for flammable gases, such as hydrogen (H2), with the exception of propane cylinders.

Can I also use DIGIGAS® for bulk gases?
For our bulk gases, there is a special telemetry service. In addition, you have the possibility to monitor the contents of your bulk tanks via the ´online tank management´ functionality. For more information, please contact us via our online contact form.

Can the DIGIGAS® system also be used for ammonia containers?
No, at this moment it is not possible to use DIGIGAS® for ammonia barrels.

What is the added value of DIGIGAS® Order?
The added value of the DIGIGAS® Order service package is that Linde takes care of the ordering and delivery of your gases. If the gas content of the cylinder has reached the preset threshold, this gas is automatically ordered from us and the delivery is planned by Linde. Therefore you don't need to place an order yourself. More information about DIGIGAS® Order can be found here.

Can I access the DIGIGAS® dashboard via the ´my account´ area?
At the moment this is not possible. The DIGIGAS® dashboard has a separate URL.

Are there additional costs for the SMS notification via the DIGIGAS® dashboard?
No, the cost of the SMS notifications is included in the service, regardless of the number of text messages you receive.

How many sensors can be connected to a repeater (receiver)?
A maximum of 256 sensors can be connected to a repeater. The sensors must be within a range of 15 metres of the repeater. There must be no obstacles (such as a reinforced concrete wall) between them as this could interfere with the transmission. If it is necessary to extend the range, Linde can supply an extension cable.

How long does the sensor battery last and can it be replaced?
The battery has a lifetime of 5 to 10 years. The battery cannot be replaced.

Will I get a notification when the sensor battery is low?
Yes, the battery percentage is sent to the cloud every 24 hours. A notification is sent to you if the percentage is below a certain level.