OPW Engineered Systems HOME PRODUCTS BRANDS APPLICATIONS RESOURCES TECH SUPPORT COMPANY NEWS CONTACT OPW HOME LOGIN DISTRIBUTOR PORTAL SUPPLIER PORTAL COMPANY EMAIL CAREERS LEADING THE WAY SINCE 1892 CALL NOW! 1-800-547-9393 CONTACT US NOW OPW Home | OPW Engineered Systems / Process Products Process Products OPW offers products that monitor, sense and reveal the fluids in your operation. Whether you’re monitoring petroleum products, liquefied gases, solvents, or hazardous, corrosive chemicals, OPW’s collection of Process Products help keep your fluids under control VISI-FLO® SIGHT FLOW INDICATORS VISI-FLO® 1400 Series Sight Flow Indicators VISI-FLO® 1500 Series Sight Flow Indicators VISI-FLO® 1600 OEM Series Sight Flow Indicators ISOLATION RINGS & GAUGING PRODUCTS ISO-Ring Gauge Isolation Ring ISO-Spool For Small Diameter Piping PIGGING SOLUTIONS HilTap Product Recovery Pigging Systems™ PRODUCTS Chemical & Industrial Products Loading Arms & Systems Swivel Joints Quick & Dry Disconnects Process Products VISI-FLO® Sight Flow Indicators Isolation Rings & Gauging Products Pigging Solutions Other Product Families Transportation Products Electronic Systems Retail Fueling Products CONTACT OPW Careers Privacy Policy Transparency in Supply Chains Disclosure Facebook LinkedIn Twitter Google+ YouTube Copyright ©2009-2016 OPW, A Dover Company OPW Engineered Systems Corporate Headquarters: 2726 Henkle Drive Lebanon, Ohio, USA 45036 (513) 932-9114 • (800) 547-9393 The following U.S. patents have expired: 4,199,012; 4,351,375; 4,429,725; 4,505,308; 4,453,578; 4,497,350; 4,557,302; 4,649,969; 4,682,714; 4,825,914; 4,971,121; 5,007,468; 5,135,029. OPW claims no rights in any patent beyond its expiration. Back to top