Normal pressure bar and high quality pressure bar
Ordinary pressure bar:
Ordinary pressure rods usually use relatively basic materials and relatively simple manufacturing processes. The wall of the tube may be thin, generally about 1-2 mm, and the quality of the steel used is relatively ordinary. In terms of sealing, ordinary rubber seals may be used, which have slightly poor aging resistance and sealing.
The service life of the ordinary pressure bar is relatively short, and its service life may be 1-3 years in the normal use environment (4-8 hours per day, indoor temperature and humidity are appropriate). If the use environment is not good, such as often in a humid environment or frequent overweight use, there may be problems in about 1 year, such as gas leakage, not smooth lifting and so on.
High quality pressure bar:
High quality pressure rods tend to come from well-known brands, which are more strict in the choice of materials. For example, the wall of the tube is made of high-strength alloy steel, which can reach a thickness of 2-3 mm or more, and this material can withstand higher pressures. The internal mechanical parts such as pistons are usually finely machined to match with high precision and reduce wear.
In terms of sealing, high quality pressure rods will use special high-quality rubber seals or other advanced sealing materials, which have good elasticity, oil resistance and aging resistance. Under normal conditions of use, the service life of the high-quality pressure bar can reach 5-8 years, and even in the ideal use environment (such as a stable temperature of 18-25 degrees Celsius, moderate humidity, low frequency of use), the service life can be more than 10 years.
Single-stage and multistage barometers
Single stage pressure bar:
The single stage pressure bar is relatively simple in structure, with only one chamber inside. Its advantage is that the cost is low, and it is more common in some office chairs with low requirements for chair height adjustment. Due to the simple structure, the mechanical components of the single-stage pressure bar are relatively few, and the probability of failure is relatively low in theory.
However, the adjustment range of the single-stage pressure bar is limited, and the internal parts such as the piston are easy to wear when the height is frequently adjusted. Under normal use, the service life of a single stage pressure bar is about 2-4 years.
Multistage pressure bar:
The multi-stage pressure bar has a plurality of air chambers inside, which can achieve a finer height adjustment, suitable for users who have different needs for the height of office chairs. However, due to its complex structure, internal mechanical parts and sealing links more, the possibility of problems relative to the single-stage pressure rod is higher.
Under normal conditions of use, the service life of the multistage pressure bar is about 3-6 years. However, if the manufacturing process and material quality of the multistage pressure bar are high, and the use and maintenance are proper, its service life can also reach a longer time.
Certified and uncertified barometers
Certified pressure bar:
Air pressure rods certified (such as BIFMA certification, SGS certification, etc.) have certain guarantees in terms of safety, durability and quality stability. These certifications require pressure rods to undergo rigorous testing, including pressure testing, fatigue testing, tightness testing, and more.
Certified pressure rods in the normal use of the environment, the service life is generally more than 3-5 years. And in the whole service life cycle, its performance decline is relatively small, and it can maintain a good working condition.
No certified pressure bar:
Without the authoritative certification of the pressure bar, the quality and performance are difficult to guarantee. It may have defects in material quality and manufacturing process, such as the use of inferior steel, poor sealing and other problems. The service life of this pressure bar may be very short, it may fail between a few months to 1-2 years, and there is a greater safety risk during use.
Post time: Jan-24-2025