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.