Flow direction indicator loop

摘要

An apparatus and method for determining direction of flow in a fluid or pneumatic system. The apparatus comprises first and second conduits having clear portions, the first and second conduits being capable of determining fluid flow direction in the system by observing fluid through their clear portions. The apparatus further comprises a valve assembly connecting the first conduit to the second conduit, the valve assembly including a shut-off valve. The valve assembly can comprise a release valve for releasing fluid from the valve assembly, and a release mechanism for opening the release valve. The system may include a transmission system and a fluid circuit with a first port and a second port, a transmission service system being connected to the first port and the second port of the fluid circuit according to the direction of fluid flow determined by the apparatus.