![]() To reduce the effects of back pressure a conventional PRV can be outfitted with a bellows. ![]() Measures can be taken to mitigate these shortcomings however they bring limitations of their own.įor example, a conventional valve can be constructed with a soft seat to improve sealing, but this will generally introduce temperature limitations. In smaller sizes they are generally lower cost than PORVs, and most designs will follow standard API 526 center-to-face flange dimensions.Ĭonventional PRVs may not be well suited for applications requiring maximum seat tightness / sealing, minimal simmer, or applications with high or variable back pressures. ![]() Conventional relief valves can be the best fit for applications that will expose the valve to high temperatures, highly viscous, or dirty services.
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