Piston-operated Sinclair Collins Series SC-2000 controls hot/cold liquids and inert gas between -40 and +450°F in textile, petrochemical, and HVAC industries. Stainless steel 3-piece valve, in 2- and 3-way models, withstands up to 500 psi with virtually no cracking pressure. Cast arrow on body clearly indicates flow direction. Multiple port sizes range from 1/2-1 in.