These manifolds are designed for remote mounting an instruments using threaded instrument & process connections. These valves are having two isolation, one equilizer & two vent/calibration valves. The standard process & instruments connections are 1/2" NPT. Two vent connections are 1/4" NPT in all manifolds & provided with blanking plugs.The instrument connections are positioned at 54 mm center distances but can easily be used with instruments other then 54 mm C.D via screwed fittings. Different options are available as shown.