SFA 15 and SFA 15-50 are standard, back pressure dependent safety relief valves in angleway execution, specially designed for protection of vessels and other components against excessive pressure. SFA 15-50 has a 50% reduced capacity compared to SFA 15. The valve is designed to meet the strict quality demands and safety requirements for refrigeration installations, specified by the international classification societies. The spring housing is closed tightly to avoid refrigerant leakage. The inlet flow diameters of the valves are: - 13 mm (½ in.) for both SFA 15 and SFA 15-50 The valves can be delivered with set pressures between 10 and 40 bar g (145 and 580 psi g). Standard pressure setting valves having TUV Pressure Setting Certificate" with each valve, are also available.