Superior 802B-4 High Vacuum Check Valve With Quarter Inch SAE Thread

Superior 802B-4 High Vacuum Check Valve is a compact inline valve designed for high-vacuum service, featuring a 1/4 in. SAE threaded connection for straightforward integration into vacuum lines. As part of Superior’s 802B HV check valve series, this model provides one-way flow to prevent backflow from downstream equipment, protecting pumps, gauges, and downstream instrumentation in refrigeration, HVACR, and laboratory vacuum rigs. The 1/4 in. SAE thread aligns with common vacuum fittings, enabling reliable seals with standard service ports and manifolds. The 802B series is documented by Superior in HV-Check Valves catalogs, illustrating variants for different thread and connection options to suit varying piping arrangements. Typical applications include refrigeration service lines, laboratory vacuum benches, and compact vacuum manifolds where backflow prevention is required and space is limited.