Office Chair at the Lowest Position

When an office chair is lowered to its lowest position, it is safe and represents the safest state among all usage positions. When the chair is at its lowest, the piston rod retracts, the internal gas is evenly distributed, the pressure generated by the body's weight has the least impact on the gas when sitting down, and the additional load on the gas spring is also at its lowest. However, if the quality of the gas spring itself is subpar, there may be safety hazards at any position. Gas spring explosions are often caused by factors such as overly thin tube walls, unqualified materials, and insufficient purity of the filled gas (e.g., using high-pressure air instead of nitrogen).

There are three main ways to lower the height of an office chair:

• Pneumatic adjustment: After sitting firmly, find the height adjustment handle on the right side under the seat. Hold it with your hand and gently lift it upwards. Slightly lift your body, keep the handle lifted, and rely on your body weight to slowly and steadily sink. The chair will then descend accordingly. Release the handle to lock the height when it reaches the desired level. This method is simple to operate and is commonly used for most office chairs with gas springs.
• Mechanical adjustment (screw/rotary type): Locate the adjustment knob or screw with a fixing function in the center or on the side of the chair base. To lower the height, rotate the knob clockwise (usually clockwise for lowering; for old-style chairs with fixing screws, first use a tool to loosen the screw counterclockwise). While rotating, manually press the seat down to the desired height. After adjustment, tighten the screw clockwise again to secure it. This adjustment method is relatively traditional and is suitable for some office chairs with mechanical structures.
• Electric adjustment (high-end type): On the control panel of the seat armrests or base, find the button marked with an up-and-down icon. Press it to automatically raise or lower the chair. This method is convenient to operate and is usually found in some high-end electric office chairs.

In addition, if an office chair immediately lowers to the lowest position when someone sits on it, it may be due to gas spring leakage or a cracked or severely worn tray. In this case, the gas spring or tray needs to be replaced to ensure the normal use and safety of the office chair.