Pneumatic tubing is a concept of doing a function with the help of compressed air or vacuum and they are used in all pneumatic systems. Pneumatic tubing should possess a unique combination of high flexibility and dynamic performance coupled to excellent resistance to abrasion and aging. The pneumatic tubing issues are resistance to temperature, hydrolysis, pressure, chemicals and flexibility. To overcome these problems, tubing is made in different materials to suit different conditions and some of the materials used are polyamide tubing, polyethylene tubing and polyurethane tubing.
A pneumatic gas cylinder valve actuator that clamps to the threads on gas cylinder normally used for threading on a protective cap and is so designed that air pressure up to 100 psi admitted to the internal piston chamber in the valve actuator opens the gas cylinder valve while compressing the springs under the pistons in the internal piston chambers so that when air pressure is cut off the springs return the gas cylinder valve to the closed position; a torque indicator on top of the valve actuator shows proper positioning of the valve actuator clamp to adjust the closing torque exerted by the springs under the pistons to about 70 inch pounds.