Technical Knowledge Base
Free engineering calculators, knowledge guides, and reference data for valve and piping engineers. Bookmark this page — updated regularly.
Interactive Calculators
Valve Sizing Calculator
Calculate required Cv/Kv for liquid, gas, and steam service. ISA/IEC 60534 formulas. Includes valve size recommendation and Cv reference table.
Open CalculatorValve Torque & Actuator Sizing
Calculate operating torque for ball, butterfly, and gate valves. Determine actuator output with safety factors. Includes torque reference table.
Open CalculatorP-T Rating Calculator
ASME B16.34 pressure-temperature ratings. Look up max pressure for WCB, SS316, alloy steel at any temperature. All classes 150–2500.
Open CalculatorUnit Converters
Pressure (bar/psi/kg/cm²), temperature (°C/°F), Cv↔Kv, flow rate vs pressure drop, and pipe size calculator. CSV download available.
Open ConvertersKnowledge Guides
Valve Selection Guide
How to choose between gate, globe, ball, butterfly, check, knife gate valves. Decision matrix, 12-property comparison chart, application-based selection for 6 industries.
Read GuideValve Material Guide
WCB vs SS316 vs Duplex vs NAB vs Bronze. 17 body materials, 8 seat materials, corrosion resistance chart (8 media × 7 alloys), temperature limits.
Read GuideValve Standards Reference
Complete reference: 16 design standards (API, BS, MSS, IS), 6 testing standards, 8 dimensional standards, 9 material standards, IBR guide.
Read GuideTechnical FAQs
In-depth answers to technical questions about non-slam check valves, diaphragm valves, IBR certification, valve maintenance, and more.
View FAQsReference Data & Tables
Valve Test Pressure Chart
API 598 hydrostatic body, seat & air test pressures (Class 150–2500). ASME B16.34 P-T rating for WCB. PN test pressures per EN 12266. Test duration & leakage classes.
View ChartFlange Dimension Tables
ASME B16.5 Class 150–2500, B16.47 Series A & B, PN flanges. Bolt patterns, gasket data, OD, bolt circle.
View TablesValve Cv Tables
Flow coefficient (Cv) data for gate, globe, ball, and butterfly valves by size. Useful for valve sizing verification.
View Cv DataMaterial Compositions
ASTM material chemical compositions, mechanical properties, equivalent grades across ASTM/EN/IS standards.
View DataPipe Schedule Tables
Pipe wall thickness, OD, ID, weight per meter for all standard schedules (Sch 5 to Sch XXS). NPS ½" to 24".
View TablesPipe & Fitting Data
Dimensions for tees, elbows, reducers, and flanged fittings. ASME B16.9 and B16.11 data.
View DataStandards Overview
Quick overview of ASME, ANSI, API, ISO, BS, IS valve and piping standards with scope summaries.
View Standards