The manifold isolates instrumentation and allows venting of the instrument for calibration / removal from the circuit without effecting the process / application and or recovery of a sample etc. Standard 1/2” inlet x 1/2” outlet with a 1/4” vent port. Incorporated are all the standard long service life features of the standard 'N' Series needle valve, multi-ring piston style packings, back sealing facility. Safe, anti-rotational cam locking device. Most standard options such as locking devices are available. Mounting holes supplied as standard for pipe or wall mounting to suit quick installation.