Ball & Plug ValvesA VALVE IS A DEVICE THAT REGULATES, DIRECTS OR CONTROLS THE FLOW OF A FLUID BY OPENING, CLOSING, OR PARTIALLY OBSTRUCTING VARIOUS PASSAGEWAYS. Valves are technically valves fittings, but are usually discussed as a separate category DBTT(DBB Trunnion Top Entry Ball Valve)Materials in accordance to NACE MR 01.75. Catalog Spec. Bolted Bonnet -Cast Body/Forged Bonnet and Trim (forged body available on request). Soft/Metal Seated. Self Relieving or Double Piston Effect Seat Anti Blow-Out stem. Bleed Type (Needle or Globe valve). Above ground installation. Materials in accordance to NACE MR 01.75. Emergency sealant injection to stem & seat. Antistatic device. Fire safe API 6FA-API 607 ISO 14097. Full In-Line Maintenance either with vertical and horizontal stem.