Naval longstem ball valves are type tested according to the EN488 standard and fulfill the requirements of this standard.
Stem sealing at the top of the stem, upper O-rings can be changed without breaking the insulation. Stem and upper part of stem neck are of stainless steel. Single piece stem is equipped with bearings. Clear position indicator. Valves up to DN150 are operated with T-key, larger valves with portable planetary gear.