Festo GRLA-1 4-NPT-QB-3 8-U One-Way Flow Control Check Valve

The FESTO GRLA-1 4-NPT-QB-3 8-U is a one-way flow control check valve from FESTO, designed to allow flow in a single direction while regulating that flow and preventing reverse flow. The model name GRLA-1 4-NPT-QB-3 8-U and the associated identifiers 534663 and S #331778 precisely locate this configuration for ordering and cross-reference. The 4-NPT portion of the designation indicates the threaded connection described in the part name, aligning with FESTO’s naming convention for this family of valves. This specific variant is traceable through its part numbers, facilitating accurate replacement, procurement, and documentation in assemblies that require a dedicated flow-control check valve from FESTO.