HCV01B
Staitech have recently introduced a fully machined version of their HCV01 check valve which fully complies with the ASME BPE surface finish criteria of SF1. Valves can also be electropolished to meet the SF4 finish criteria.
The image below shows how the HCV01B check valve is designed to fit between two ASME BPE compliant clamp fittings, sealing on the ID of the tube using FDA and USP approved EPDM O-rings.