When ordered, the valve configurati

When ordered, the valve configuration and construction materials were selected to meet particular pressure, temperature, pressure drop, and controlled fluid conditions. Responsibility for the safety of process media and compatibility of valve materials with process media rests solely with the purchaser and end‐user. Since some body/trim material combinations are limited in their pressure drop and temperature ranges, do not apply any other conditions to the valve without first contacting your Emerson Process Management sales office. Before installing the valve, inspect the valve and pipelines for any damage and any foreign material which may cause product damage.1. Before installing the valve, inspect it for any shipping damage and for any foreign material in the valve body cavity. 2. Clean out all pipelines to remove pipe scale, chips, welding slag, and other foreign materials. 3. Use accepted piping and welding practices when installing the valve. For flanged valves, use suitable gaskets between the valve and the pipeline flanges. 4. Do not install the valve in a system where the working pressures exceed those specified in the ASME pressure/temperature ratings or those specified by Emerson Process Management. 5. If continuous operation is required during maintenance and inspection, install a conventional three‐valve bypass around the valve so that the valve can be isolated. 6. Orient the valve so that flow will be in the direction indicated by the flow arrows.Note The common port for the YD is the bottom port as shown on the flow direction plates (key 17) in figure 10. The common port for the YS is the left‐hand port as shown on the flow direction plates in figure 9.