NOVELTY - The equipment has a pressurized vessel (200) for maintaining fluid in vapor or gas phase at pressure range of about greater than or equal to 1 bar. A plug forming system (100) containing a plug forming device (105) is located in a plug forming chamber (130) having first end at lower pressure than second end of chamber. The device receives feedstock at first end for preventing fluid from the vessel. A sealing head (300) inside vessel is made movable between sealing (350B) and rest position (355B) for isolates the vessel from chamber such that feedstock entering the vessel does not bridge.    USE - Equipment for transferring ligno-cellulosic feedstock e.g. straw e.g. wheat. Uses include but are not limited to straws such as rice, barley, oat, rape, sorghum, woody plants such as tree, shrub, conifers such as pine, spruce, fir, cedar, hardwood plants such as aspen, birch, cherry, maple, oak, teak plant, salix, eucalyptus, softwood such as pinus sylvestris, pinus radiate, tubers e.g. beet, potato, waste paper, fiber fractions from biogas processing, manure, residues from oil palm processing, municipal solid waste.    ADVANTAGE - The feedstock plug device being sufficiently compact prevents the flashing of the pressurized vessel and thus, loss of pressure from the vessel is prevented. The occurrence of wetting in the plug forming chamber improves the capability of feedstock to form the desired plug. The provision of sealing head inside the pressurized vessel allows efficient transfer of a ligno-cellulosic feedstock from a low pressure environment to a high pressure environment of plug forming chamber. The distance between sealing and rest position of the sealing head prevents the formation of feedstock bridging inside a pressurized vessel and thus, break-up and the falling by the gravity of the feedstock plug is prevented.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of operation the equipment.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an equipment for transferring a ligno-cellulosic feedstock.    Plug forming system (100)    Plug forming device (105)    Second end (110A)    First end (110B)    Plug forming chamber (130)    Pressurized vessel (200)    Vapor or gas phase (210)    Feedstock outlet (220)    Feedstock inlet (230)    Sealing head (300)    Sealing position (350B)    Rest position (355B)