A line of quick-fitting ball valves from Pisco USA Inc., Elk Grove Village, Ill., features polyphenylene-sulfide (PPS) construction. PPS is lightweight and allows a range of configurations including elbow styles. Wear, chemical, and noise-resistant ball valves have outside tube diameters ranging from 0.125 to 0.5 in. The 20 and 60 Series ball valves handle pressures from –29.5-in. Hg to 150 psi. Operating temperatures range from 32 to 140°F.