Armchair Gazlift: Sizes, Rules of Selection and Replacement

Today, in almost every office there is a special, the so-called office chair on which workers are sitting at their tables. It is significantly more convenient than the ordinary chair, because it allows you to adjust the height, allowing you to choose the best level for a specific person. In addition, in such an armchair you can leake the back if necessary. One of the most frequent breakdowns of such seats is the loss of the height of the height of the seat. And the reason for this is the malfunction of such a detail like a gas lift. We will try to figure out what it is for the item and what it happens.

Armchair Gazlift: Sizes, Rules of Selection and Replacement

What it is

Gazlift, which is an integral element of office chairs, is a device that in its appearance resembles a truck body lift system, but slightly smaller in dimensions. Other name of this device – Gas spring.

Externally, a gas lift for a chair is a pipe made of metal with a pair of parts of various sizes.

The mechanism of this gas spring is attached from above to the base of the seating, and it is fixed to the cross. Lift height will depend on the size of the pneumatic cartridge. Usually its length varies in the range of 13-16 centimeters.

Armchair Gazlift: Sizes, Rules of Selection and Replacement

Armchair Gazlift: Sizes, Rules of Selection and Replacement

It should be noted that the gas lift has 3 functions.

  • Shock load trimming. It is about when a person sits in a chair, the mechanism works like a shock absorber, a sipping seat and substantially lowering the load on the spine. Thanks to the specified properties, the chairs are becoming significantly more comfortable and easier to use. That is, you can quickly sit down and climb, not afraid that problems can appear with the back.
  • Adjusting the position of the seat. Applying a pneumatic cartridge, in a few seconds you can raise or lower the chair, without making some serious effort. It is enough just to press the lever from the bottom, and the design either falls under the weight of its mass, or it will rise if it is raised from it, which will reduce resistance.
  • The possibility of circular rotation of the chair. This allows you to freely access everything that is located at a distance of 50 centimeters and turn where it is necessary if it is necessary. Specialism is designed in such a way that you can spin around your axis without any problems.

Armchair Gazlift: Sizes, Rules of Selection and Replacement

Armchair Gazlift: Sizes, Rules of Selection and Replacement

Armchair Gazlift: Sizes, Rules of Selection and Replacement

    In fact, the Gazlift is a special hydraulic type cylinder created specified for office chairs.

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

    Device and principle of operation

    If we talk about the device under consideration, it should be said that The main parts of this design are such elements.

    • Button. Due to its pressing, it is closing and opening the valve, which produces gas production from one camera to another, which allows you to adjust the height of the entire design. Pressing occurs when the lever located under the seat seat. Although sometimes it can be located elsewhere.

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

    • Rod lifting. This part is extended either lowered into the housing, depending on the increase or decrease in the height of the chair. By the way, this item is particularly durable, because the mass of a sitting person has the greatest pressure on it.

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

    • Various kinds of seals and sleeves. They are needed for a high-quality connection of various parts and sealing of cavities, where gas is usually located.

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

    • Gas valve. This item keeps the entire mechanism in a certain position and opens if you want to change the height level of the seat.

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

    • External and internal cavities, as well as bypass canal. Due to the movement of gas according to these parts of the mechanism, height control occurs.

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

    • Bearing of reference type. It is located below and is responsible for the free rotation of the chair in different directions. The strength of this type of connection is simplicity, which ensures its durability.

    Armchair Gazlift: Sizes, Rules of Selection and Replacement

      If we talk about the principle of the operation of the GasLift, then it cannot be called complicated. Let’s begin with that The mechanism consists of a pair of tanks and valve, which can open and close. It is his work that causes moving through the airproof channel of gas between tanks. If the chair is located in the lower position, then the piston will be in the maximum raised position. When you click on the lever, the valve opens, gas starts to move to another tank and thereby keeps pressing the piston, which moves down and lifts the chair.

      As soon as the chair is at the right level, it is just necessary to let go of the lever. The valve immediately closes, and the chair will be in the right position. If you want to lower the chair, you should simply press the lever, after which it drops under the weight of the human mass. That is, to raise the chair, it takes to build it. How can you make sure the principle of operation of the Gazlift is extremely simple.

      Armchair Gazlift: Sizes, Rules of Selection and Replacement

      Views and sizes

      There are various types of gas lift, because of which various models of mechanisms should be known to select the correct option, and that they are special. Usually all of them are made from the highest quality steel. Typically, gas lifts are divided into classes depending on the thickness. All of them there are 4.

      • Feature of models that belong to the first is that the thickness of the steel here is only 1.2 millimeters. These are the cheapest devices;
      • In the second group, the thickness of steel will be slightly more – 1.5 millimeters;
      • The third group will already have a thickness of steel – 2 millimeters. Such gas lifts can withstand the load up to 120 kilograms.
      • The last group is the most durable devices where steel thickness is 2.5 millimeters. Such a reinforced gas lift can withstand 30 kilograms than models from the third group.

      In addition, the device under consideration may differ in the diameter of the case. They can be 2 types.

      • 38 millimeters. This option is not used very often. It is usually used in chairs for managers, where the cross is too high
      • 50 millimeters. Used in 90% chairs.

      Another important parameter will be the length of the mechanism under consideration. From it will depend on the range of height settings.

      Armchair Gazlift: Sizes, Rules of Selection and Replacement

      Armchair Gazlift: Sizes, Rules of Selection and Replacement

      Armchair Gazlift: Sizes, Rules of Selection and Replacement

      There are the following groups of gas lift on this criterion.

      • From 20.5 to 28 centimeters. This version will be applied in relatively affordable office products designed for the tables with standard characteristics. A similar gas lift will be short due to the fact that the range of adjustments is extremely small.
      • From 245 to 310 millimeters. Such gas lifts are used in places where the design should rise higher. The length of the device is though more, but the tuning range will be even smaller here than the aforementioned analog.
      • From 290 to 415 millimeters. These are the longest mechanisms that have ample opportunities in terms of adjusting the height, which makes it possible to strongly change the position.

      Armchair Gazlift: Sizes, Rules of Selection and Replacement

          These gas lift groups are considered basic, although other models can be found on the market. For example, 180 mm. But they are used quite infrequently, because of what they are more exclusion from the rules.

          Armchair Gazlift: Sizes, Rules of Selection and Replacement

          How to pick up

          Considering that there are different categories of gas lift, and this is such a detail that time from time to time fails, it will not be superfluous to consider how to choose the right gas lift. To begin with, it should be said that the cause of breakdowns of gas lifts, due to which they have to change, are the following points.

          • Manufacturing defects. This problem is rather an exception, but still takes place, especially in the most affordable versions.
          • Overload Gazlift. It happens that the design that is intended for one mass is used by people whose weight exceeds this indicator, because of which the wear of the components occurs with an accelerated pace.
          • Wrong use. It happens that furniture or any other gas-lift may fail due to the fact that a person sits down in a chair in a chair or does it with a weakege. Such use of the chair is fraught with a simple squeezing of the valve.

          Armchair Gazlift: Sizes, Rules of Selection and Replacement

            In such cases, the replacement of the Gazlift. But to accomplish it, it is necessary to choose it correctly. It is extremely important, because the discrepancy in certain characteristics can entail the accelerated wear of the new device and its subsequent breakdown. So that this does not happen, you should make a choice, relying on such moments.

            • Diameter of the cupboard. It can be 2 types, so on this criterion to determine the desired option will be easy.
            • Height of Gazlift. In this case, it is required to make a measure of length, taking into account that part will be located inside the cross.
            • Product size. Note that the gas lifts are made with different dimensions, so the size when choosing to take into account.
            • Maximum load. Select the mechanism class is necessary depending on the mass, which it will have to withstand when used. And other people should be taken into account that other people can use.

            Armchair Gazlift: Sizes, Rules of Selection and Replacement

            How to change

            As it was said, when a gas lifter breakdown, it is almost impossible to repair it, which means it is required to replace it. To do this, first prepare certain tools and understand the actions algorithm. It will be necessary to have the following things at hand:

            • New Gazlift, which will be installed instead of the old;
            • crosshead screwdriver;
            • a hammer;
            • Ring meal;
            • WD-40 liquid;
            • vice.

            Armchair Gazlift: Sizes, Rules of Selection and Replacement

              So, before replacing the gas lift to a new one, you need to remove the old.

              For this Processing the location of the parts of the chair with liquid WD-40. We leave the design in such a state somewhere for 12 hours so that the mixture gets on the connections. Now you need to start disassembling the chair and disconnect the seat. For this you need a cruciform screwdriver. With it we will weaken the bolts, which fix the seat to the pirastra. After that, we turn the chair and dismantle the seat together with the decorative case, which is located on the lift.

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              Now it is necessary to disconnect the lift from the Cross and Piastra. This can be done using a gaslift knocked out with a tip, made of rubber. To speed up this process, you can apply a paint. Before starting work, remove a special retaining ring from the cross. This is a check, which is located on the opposite side of the Cross, where the pneumopatron joins.

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              Now it is necessary to remove the pneumopathron with piastra. This work should be made as accurately as possible in order not to deform the connections. Tapping hammer should be done in different places so that you can carefully get a gas lift.

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              Armchair Gazlift: Sizes, Rules of Selection and Replacement

              It is only necessary to install a new Gazpatron.

                First we insert it into the cross to a special click, attaching some effort, and wear a protective cover, then we connect everything with Piastroy. It remains only to assemble the chair in the reverse order.

                Armchair Gazlift: Sizes, Rules of Selection and Replacement

                Armchair Gazlift: Sizes, Rules of Selection and Replacement

                Armchair Gazlift: Sizes, Rules of Selection and Replacement

                The video below tells how to choose the right gas lift for the chair.

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