Non Return Valve - SolidWorks

grabcad

In modern piping systems, Non Return Valves (NRVs) are often classified as control valves due to their specific functional attributes. Typically installed between pumps and storage vessels or after a pump installation, they help regulate fluid flow, thereby enabling operators to optimize the system's performance efficiently. To determine if a valve falls into this category, we must look beyond its basic structural configuration. A crucial element for differentiating control NRVs from conventional non-return types lies in their response characteristics to operating conditions such as varying discharge pressure. While common NRV designs are geared towards isolating a system, NRV valves classified under control applications have a more proactive approach: instead of merely serving as flow stoppers or preventers during specific operations (like isolation or relief valve service), they work together with downstream components, adapting to and influencing system pressures. By combining elements from both typical flow regulators and self-contained back-pressure relief systems, they achieve exceptional dynamic range in various industrial processes like HVAC/R air systems, natural gas lines, fuel pipelines and large water treatment networks