Free Engineering Tools
Valve Engineering Tools & Reference
Calculators, converters, and compatibility guides for industrial valve sizing and selection. All tools are indicative only — for preliminary engineering use.
Valve Finder
5-Question Selection Quiz
Not sure which valve type you need? Answer 5 questions about your application — function, fluid, pressure, size, and actuation — and get an instant recommendation with specs and a pre-filled WhatsApp quote request.
Valve Cv Calculator
Liquid · Gas · Steam
Estimate required flow coefficient (Cv) using ISA S75.01 correlations. Supports liquid, gas/vapour, and steam service. Includes viscosity correction and choked flow detection.
Valve Weight Calculator
Ball · Gate · Globe · Butterfly · Check
Estimate valve weight by type, NPS (½"–24"), ASME pressure class, and body material. Useful for piping stress calculations, transport planning, and BOM preparation.
Pressure Class Converter
ASME · PN · JIS
Convert between ASME pressure classes (150–2500), PN (DIN/EN) ratings, and JIS K ratings. Working pressure table by material group with typical valve applications.
Fluid Compatibility Guide
25+ Process Fluids
Material compatibility tables for sulphuric acid, chlorine, seawater, crude oil, ammonia, LNG, CO₂, steam, and more. Recommended valve types and standards per fluid.
DN / NPS Converter
DN15–DN600 · NPS ½"–24"
Complete DN to NPS pipe size conversion table with outside diameter, nominal bore (NB) designation used in India, and typical schedule availability per ASME B36.10M.
Pipe Wall Calculator
ASME B31.3 · Process Piping
Calculate minimum required pipe wall thickness per ASME B31.3 Eq 3a. Inputs: NPS, design pressure, temperature, material, corrosion allowance. Returns t_min, ordered thickness, and indicative schedule.
Need the actual valves?
Browse Our Full Product Range
Once you've sized your valve, we can supply it. Vajra Industrial Solutions stocks ball valves, gate valves, butterfly valves, globe valves, check valves, and more — all API 6D and ASME B16.34 certified.
⚠ Engineering Disclaimer
All tools on this page produce indicative, approximate results for preliminary engineering use only. Results must not be used as the sole basis for valve specification, procurement, or safety-critical design. Always verify with a qualified process or mechanical engineer using full fluid property data, applicable standards (ASME B16.34, ISA S75.01, IEC 60534, EN 1092), and manufacturer-published data sheets. Vajra Industrial Solutions and VajraVyuh Enterprise Pvt. Ltd. accept no liability for any consequence of using these tools.