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 VBWB(Trunnion Welded Body Ball Valve)Materials in accordance to NACE MR 01.75. Catalog Spec. Welded Body – Cast or Forged body and closure. Soft/Metal Seated Self Relieving or Double Piston Effect Seat. Anti Blow-Out stem. Above/under ground installation Materials in accordance to NACE MR 01.75. Emergency sealant injection to stem & seats Antistatic device. Fire Safe API 6FA API 607 ISO 14097. Double Block & Bleed.