Audco india ltd. Manufactures ss gate valves. The api 603 family of ail ss gate valves is an economic alternative to api 600 ss gate valves. They are available in flanged construction and in pressure ratings of asme class 150 and class 300. Gate valves are of flexible wedge, outside screw-and-yoke and bolted-bonnet construction. The body and bonnet are cast with uniform section and generous radius fillets to prevent stress concentration. The castings are precision machined for high performance. The gate valve body has a straight through port without recesses except at the seat area. This ensures minimum turbulence, erosion and resistance to flow. Long integral guide ribs in the body match with full-length guide slots in the wedge for accurate alignment and guidance. The valves feature a one-piece cast flexible wedge that minimizes stress concentration. Wedge flexibility ensures tight seating over a wide range of differential pressures and temperatures. It also adjusts to slight misalignments caused by pipeline deflections and thermal deformation. The stem-to-wedge thrust is applied close to the wedge center. This reduces lateral stem loading and provides for more accurate wedge movement.
