VNI-A4VG: 4" intermediate swivel with Viton GFLT seal.
VNI-A4AVI: 4" intermediate swivel with Viton GFLT seal and Aviation grease.
Liquip offers a market leading 180o single-plane swivel for use on Liquip loading arms.
The VNI series is fitted between the primary (horizontal) spool and the secondary (vertical) spool. It allows the loading coupler to swing in & out relative to the tanker API adaptor.