Furon UPX valves, normally closed (NC), were tested for reliability in 49 wt% hydrofluoric acid (HF) by an independent test lab using the protocol of a major US OEM manufacturer. Furon UPX high purity valves are specifically designed for safe and reliable transfer of highly aggressive chemicals, including concentrated HF and HCl. Furon UPX valves are also capable of handling a wide variety of abrasive slurries and have a long track record of success in slurry applications.
Accelerated Life Test Method
Eight Furon UPX 2-way valves were assembled in a manifold allowing two parallel flow paths through each set of 8 valves. Each set was cycled 3 seconds open and 3 seconds closed at room temperature with an actuator pressure of 80 psig. One set was opened as the other set was closed to maintain a constant flow of acid through the system at 76-80 psig. Valves were inspected every workday for leaks.
The accelerated life test was performed on a set of eight valves in 49% HF. Cleanroom-grade HF was used. The acid was replaced halfway through the test to ensure that full chemical strength was maintained.