Patent ID: 8910665

Claim:
An apparatus, comprising: a single-body manifold configured as a coupling interface between a pneumatic actuator and a valve positioner, the manifold defining first, second, and third flow paths and first and second ports coupled to the second flow path, the first port to be coupled to a first pressure gauge, the second port to be coupled to a second pressure gauge, the first flow path to enable fluid to flow between a supply pressure and the valve positioner, the second flow path to enable fluid to flow between the valve positioner and the pneumatic actuator and the third flow path to enable fluid to flow between the supply pressure and the pneumatic actuator to bypass the valve positioner without disrupting a process loop including the valve positioner; and first, second, and third fluid flow control devices positioned within the manifold to control the fluid flow through the respective first, second, and third flow paths, the second fluid flow control device positioned between the first and second ports.