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 ConvertersAdvanced Engineering Tools NEW
Pipe Pressure Drop Calculator NEW
Estimate hydraulic pressure drop and head loss in piping loops using Darcy-Weisbach formulas. Adjust for flow regimes and roughness.
Open CalculatorGasket Material Selector NEW
Evaluate gasket chemical compatibility, continuous temperature thresholds, and ASME seating stresses (y and m factors).
Open SelectorValve Cavitation Calculator NEW
Diagnose damaging control valve cavitation or flashing regimes. Calculate pressure recovery factors (FL) and downstream vapor pressures.
Open CalculatorFlange Bolt Torque Calculator NEW
Calculate target torque specifications (ft-lbs and N-m) for standard ASME B16.5 flanges. Adjust for bolt materials, lubricants, and view the tightening star sequence.
Open CalculatorANSI/FCI 70-2 Seat Leakage Calculator NEW
Verify allowable control valve seat leakage limits (ml/min, bubbles/min, GPM) for Classes I to VI per ANSI/FCI 70-2 and IEC 60534-4 standards.
Calculate LeakagePneumatic Actuator Sizing
Size double-acting and spring-return pneumatic actuators. Calculate air pressure requirements, spring reserve torque, and fail-safe verification. Includes torque output tables.
Open CalculatorValve Pressure Drop
Calculate ΔP across valves for liquid, gas, and steam. See effect of undersizing, cavitation warnings, and flashing analysis. Based on ISA/IEC 60534 formulas.
Calculate ΔPPipe Velocity Calculator
Calculate flow velocity in pipes. Includes erosion/sedimentation warnings, velocity limits by service, and pipe size finder. Critical for water, steam, gas, slurry systems.
Calculate VelocityInteractive Tools NEW
Valve Engineering Assistant NEW
Select chemical media, temperature, and pressure. Instantly calculate Carbon Equivalents, PREN corrosion factors, seal compatibility, and build print-ready ASME datasheets.
Open AssistantValve Selection Wizard
Answer 5 quick questions about your application and get recommended valve type. Decision tree covers function, fluid, pressure, automation, and special requirements. Expert recommendations in 2 minutes.
Start WizardValve Troubleshooting Guide
Interactive diagnostic tool for valve problems. Select symptoms: leakage, vibration, actuator failure, noise. Get ranked causes and step-by-step fix recommendations. Covers 8 common problem types.
Diagnose ProblemKnowledge Guides
Gate vs. Globe Valve Comparison NEW
An exhaustive side-by-side engineering comparison. Analyze pressure drop profiles, throttling limits, seal styles, and use the interactive selection wizard.
Read ComparisonValve 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 GuidePneumatic Ball Valve Guide
Complete guide for pneumatic actuated ball valves: actuator sizing, FO/FC fail-safe positions, solenoid valves (3/2 vs 5/2), NAMUR mounting, limit switches, and positioners.
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 approval, valve maintenance, and more.
View FAQsReference Data & Tables
Valve DN to NPS Converter NEW
Convert valve and pipe sizes from millimeters (DN) to inches (NPS). Includes an interactive calculator, exact mathematical conversions, standard commercial rounding guidelines, and outer diameter metrics.
Open ConverterValve 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 ChartASME B16.34 Pressure Rating Table
NEW! Valve pressure-temperature ratings per ASME B16.34. Class 150–2500 for carbon steel (WCB/A105), stainless steel (CF8M/F316), and alloy materials. Material group reference.
View RatingsValve Dimension Standards Finder NEW
Interactive lookup for standard valve dimensions (F2F, flange patterns, bolt circles) across API 609, ASME B16.10, API 6D, and API 602. Find exact specifications instantly.
Find Valve DimensionsFlange 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 DataValve Trim Chart (API 600)
API trim number reference — seat, disc, and stem material combinations (Trim 1–12) for gate, globe, and check valves. Essential for blowdown, steam, and sour service specifications.
View Trim ChartRFQ Valve Specifications
Real buyer BOQ patterns from email & WhatsApp inquiries — size, class, MOC, end connection.
Browse RFQ SpecsMaterial Compositions
ASTM material chemical compositions, mechanical properties, equivalent grades across ASTM/EN/IS standards.
View DataAlloy 20 Valves Guide NEW
Complete B2B specifications, dimensions, and chemical compatibility graphs for Alloy 20 (UNS N08020 / CN7M) gate, globe, ball, and check valves in sulfuric acid.
View SpecificationsPipe 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