Pressure rod quality problem
Poor material: air pressure bar is a key part of the office chair, some bad manufacturers in order to reduce costs, the use of poor quality steel or other metal materials to make air pressure bar. These inferior materials may not be able to withstand normal pressure and are prone to tube wall breakage. For example, if the strength and toughness of the steel does not meet the standards, it will be damaged during long-term pressure or when it is subjected to unexpected shocks.
Poor seal: The pressure rod is filled with high-pressure gas, usually nitrogen. If the sealing device of the pressure rod is of poor quality, the gas will leak, resulting in unstable pressure. When the internal pressure and external pressure imbalance to a certain extent, the pressure rod may explode. Moreover, the poor sealing will also make the outside air and water enter the inside of the pressure rod, accelerate the corrosion of the internal parts, and further reduce the safety of the pressure rod.
Improper operation and overuse
Overweight use: the pressure bar of the office chair has a certain load-bearing range, generally about 100-150 kg. If the user’s weight exceeds this range, or frequently lets the chair bear too much load, such as jumping on the chair, placing heavy objects, etc., will make the pressure rod bear too much pressure, increasing the risk of explosion.
Frequent lifting adjustment: The pressure rod in the frequent lifting process, the internal mechanical structure and sealing parts will continue to wear. If the height of the chair is adjusted frequently, especially if the action is rough during the adjustment process, it may cause damage to the internal parts of the air pressure rod, resulting in an explosion.
Aging and environmental factors
Long-term use: Over time, the material of the pressure bar will naturally age. Even in the case of normal use, the service life is too long (generally more than 5-8 years) may cause the performance of the pressure bar to decline. The rubber seal inside will gradually harden and lose elasticity, and the metal parts may have fatigue cracks, which are hidden dangers for the explosion.
Harsh environment: If the office chair is placed in an environment where the temperature is too high, too low or the humidity is large, it will also affect the performance of the pressure bar. For example, in a high temperature environment, the gas pressure inside the pressure rod will increase; In a humid environment, metal parts are prone to rust, and these factors can cause the pressure rod to explode.
Second, the method of identifying the quality of the pressure bar
View brands and certifications
Brand selection: Choosing a well-known brand pressure bar is an important step to ensure quality. Brands such as South Korea’s SAMHONGSA and Italy’s DONATI have a good reputation and high quality standards in the field of pressure rod production. These brands will usually mark their brand logo on the pressure bar.
Certification mark: The qualified pressure bar should have the relevant certification, such as SGS (Swiss General Notary) certification, BIFMA (American Furniture Manufacturers Association) certification. These certification marks indicate that the barometric bar has passed rigorous quality and safety tests and meets international or industry standards. For example, BIFMA certified air pressure rods have clear requirements in terms of safety, durability, etc., and can provide consumers with certain quality assurance.
Observe the appearance and structure
Tube wall thickness: The thickness of the tube wall of the pressure rod can be judged by simple measurement or intuitive observation. The wall of a good quality pressure bar is relatively thick, and in general, the wall thickness should be about 2-3 mm. Thicker tube walls can withstand greater pressure and reduce the risk of rupture.
Surface quality: Check whether the surface of the pressure bar is smooth, and there are no defects, cracks or rust. The high quality barometric surface is carefully treated with no obvious defects. If the pressure rod surface is found to have potholes, scratches or corrosion marks, then its quality may be problematic.
Lifting structure: try to adjust the pressure bar up and down to feel whether the lifting process is smooth. The good quality pressure bar should be stable and free of stalling when lifting and lowering. If the resistance is not uniform or there is an obvious friction sound during the lifting process, it may indicate that there is a problem with the mechanical structure inside the pressure rod.
Check details and accessories
Top and bottom parts: Look at the top and bottom metal parts of the pressure bar. These parts should be securely attached to the pressure bar with no signs of loosening. For example, the top seat connection and the bottom base connection should be made of high-quality metal materials and connected by reliable means such as welding or high-strength bolting.
Seal quality: Although the seal is inside the pressure rod, its quality can be judged by some details. For example, check the top of the pressure bar for oil seepage, if there is oil stains, it may mean that the seal has been damaged, and there is a risk of gas leakage. In addition, some high-quality pressure rods will use special sealing materials, such as high-quality rubber seals, which have good elasticity and aging resistance.
Post time: Jan-02-2025