Dynamic Flow manufactures a full line of high quality swivel unions. We provide swivel unions (Code Silver) that range from 1″ to 4″ and can handle up to 6,000 PSI for standard service. Also available are long sweep swivel unions (Code Red), which are designed to withstand working pressures of 10,000 to 15,000 PSI. Long sweep swivel unions for sour service are rated up to 10,000 PSI. All swivel unions have three key features, one they are made from heat-treated material to withstand high pressures. Second they have a dual-purpose packing composed of an anti-extrusion ring to reduce friction, and an active seal to prevent the fluid from leaking. All swivel unions have smooth bore finishes to ensure smooth flow. To ensure customer satisfaction, our Swivels come with full trace-ability and are manufactured from the highest quality raw materials.