Industrial Valves and Strainers Weld Procedure Development Retainerless Check Valves Knife Gate Valves Technical Specifications A primer on industrial valves and strainers A Checklist of some of the more common factors to take into account when selecting a strainer or filter. Strainer Options Y-Strainer Flow Rate Vs. Pressure Drop Charts Custom Strainer Screens – Perforated Metal and Mesh Quality Codes and Standards What is the International Organization for Standardization (ISO) What is the American Society of Mechanical Engineers (ASME) What is the Technical Standards & Safety Authority (TSSA) What is the National Board of Boiler and Pressure Vessel Inspectors (NB) What is a Canadian Registration Number (CRN)? Butterfly Valves: Seat Materials Technical Data Library Conversion Factors, Decimal Equivalents, Relative Sizes of Particles and Viscosity Conversion Perforated Metal and Mesh Open Area Data & Mesh Inch/Micron Conversion Chart