Pneumatically actuated valves have following advantages :
i. Great flexibility for use in simple as well as complex control system
ii. Adaptability for use in safety circuits.
iii. Various control functions can be easily incorporated as and when required
iv. Feedback signals from sensors can be applied conveniently for the purpose of controlling the pilot ports of these main valves. This means existing pneumatically actuated control circuits can be modified easily to incorporate any additional control requirement.