The most recent design emphasis has been on protecting or removing the seats and seating members from direct impingement by particles in the flow stream
Significant advancements in metal-seated valve technology have occurred in the past decade as answers have been sought for challenging applications within a variety of industries—oil and gas production, refining, petrochemical, power generation, mining, and pulp and paper. "Severe services" are typically those that are abrasive, high temperature and/or corrosive. Metal-seated valves are used in all of these industries and are often associated with severe service.
Severe-service applications. Oil and gas production fields often produce oil, gas or multiphase fluids with entrained sand that damages the seating surfaces, closure members and body walls of most traditional design on-off va
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