Chair gas springs are designed especially for variable and comfortable seat height adjustment of office swivel chairs, task & executive chairs. This is made possible by the patented double cylinder system, consisting of a pressure tube and a guide tube. The self-supporting pressure tube is designed to allow bending moments, for example if the load on the seat is not centered.
Read more about Gas Spring Technical Function
Gas springs are hydro pneumatic adjustment elements. The gas spring is filled with non-toxic nitrogen under high pressure. This produces a charging pressure that acts on the cross-sectional area of the piston rod. This generates the extension force. If the extension force of the gas spring is higher than the force of the counterweight, the piston rod extends. If the extension force is lower, then the piston rod retracts. The flow cross-section in the damping system determines how quickly the extension occurs. In addition to nitrogen, there is a defined amount of oil in the interior for lubrication and end position damping. The suspension comfort of a gas spring can be determined as needed and for the respective task.
Properties and Advantages of Swivel Chair Gas Springs from WinWorld
Available in different classes based on customer request
Available in different lengths and strokes
Swiveling and non-swiveling versions
Complete columns with different outer tube versions (Black or Chrome electroplated)
Different conic length adopted with your bases and mechanisms
Gas spring Pressure
As can be seen from the graphic, the spring characteristic represents the force progression of the gas spring over the stroke, from the extended to the compressed state and back. In the process, the spring characteristic value represents the force ratio F2/F1. When designing a gas strut, the force F1 is the most important criterion in addition to the dimensions. The force F1 is measured 5 mm before the end of the extension movement, thus defining the value of the spring force. The force FR resulting from the friction is created between the force lines in the compressed and extension direction. The extension speed is divided into two types of damping: With the standard gas spring, the extension speed is controlled via a pneumatic and hydraulic range. When installing the gas strut with piston rod facing down, the piston first moves through the gas-filled part (pneumatic area), then through the oil-filled part of the pressure tube (hydraulic area). The piston rod is braked by the oil.
If desired, the damping can also occur dynamically. For this purpose, a longitudinal groove is provided in the pipe, which allows for a positionally-independent damping of the gas spring.
Gas spring class
Gas springs are mainly selected by their manufacturing class. Different metal thicknesses in main body and cover and its strength against exerted moments cause to provide different solutions. Here are mainly points to be remarked when ordering.
Class 1: 1.2 mm spindle pipe and 1 mm spindle guide. (Not recommended!)
Class 2: 1.5 mm spindle pipe and 1 mm spindle guide. (Standard)
Class 3: 2.0 mm spindle pipe and 1.5mm spindle guide. (Heavy duty)
Class 4: 2.5 mm spindle pipe with QPQ treatment and 1.5mm spindle guide. (Super Heavy duty)
Type of ending joints
Based on the chair height standard and its specification, different strokes are recommended. Usually following rules are considered
Stroke 60 mm: Heavy managerial/executive chairs
Stroke 80 mm: Normal managerial chairs
Stroke 100-120 mm: Staff chairs
Stroke 150-210 mm: Counter chairs
Stroke 260 mm: Bar chairs
Some additional useful information about packing and container arrangements
Depending on type of packing (wrapped by Kraft paper or polybag and sizes of the cartons), Different calculations are available, but following instruction may provide an idea for us:
F2 pressure is customer-ordered
Standard tube diameter: 28 mm & 50 mm and also non-standard outer tube diameter: 38 mm, 40 mm, 50.8 mm
Gas spring dimensions may be customized per request
Samples for free
3-5 years warranty
SGS, BIFMA X5.1, TUV, EN1335, DIN4550, LGA, ISO9001:2008 Certified
High quality ABS protection shell
100000 times fatigue test
Gas spring are stored for over 7 days to ensure the quality before delivery