How does pneumatic height adjustment work on a drafting chair?

A pneumatic drafting chair uses a gas-charged cylinder — identical in principle to a standard office chair but with a longer stroke to achieve greater height range. Pressing the paddle lever while seated releases the cylinder valve; body weight lowers the seat. Pressing the lever while standing allows the spring-loaded gas to push the seat up. Pneumatic cylinders on commercial chairs are rated for 100,000+ adjustment cycles. At OfficeFurniture2go.com, our commercial drafting chairs use Class 4 cylinders rated for sustained heavy use — call 1-800-460-0858.