Direct mounting compact design requires minimum space for operation and installation, with fewer potential leak points.Free-swivelling ball end stem ensures perfect alignment, providing repetitive bubble-tight shutoff and long life.PTFE or graphite packing below stem threads prevents lubricant washout and thread corrosion.Back seat stem prevents blowout or accidental removal while in operation.Threaded vent ports allow vent to be safely piped away. Supplied plugged as standard.Two 7/16” UNF bolts and an instrument seal ring supplied as standard.Standard pipe bracket bolts directly to the manifold providing a rigid support for the transmitter. Instrument can be removed easily for service or repair.