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.
Authoritative Engineering Resource
Engineering Tools Library
Maintained by the Vajra Industrial Solutions Engineering Team
17
Calculators & Tools
Valve Spec Check
Specification Validation Engine
The QA gate before your RFQ goes out: validates material vs fluid compatibility, service-temperature envelope, standard applicability by valve type and class, and documented selection mistakes - against real engineering data, in seconds.
Valve Selection Assistant
Engineering Decision Engine — 20+ Inputs
Multi-input engineering tool that derives valve type, body material, trim, seat, pressure class, actuation, applicable standards, and documentation requirements from your service conditions. Covers sour service, NACE, cryogenic, high-temperature, fire-safe, and IBR requirements.
Valve Specification Generator
Printable Procurement Datasheet
Generate a print-ready valve technical specification sheet from your service conditions. Covers materials, pressure class, standards, special requirements (NACE, fire-safe, IBR, fugitive emission), documentation list, and commercial terms. Download as PDF and attach to your RFQ.
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.
Valve Diagnostic Engine
Interactive Root-Cause Analysis — 6 Symptom Paths
Select the symptom (seat leakage, stem leak, high torque, noise/vibration, actuator hunting, external leak), answer condition questions, and get a ranked root-cause diagnosis with engineering explanations, corrective actions, and links to detailed failure analysis.
Water Hammer Risk Estimator
Joukowsky Surge — Closure Time Analysis
Estimate surge pressure from pipe length, flow velocity, and valve closure time. Compares closure against the pipeline period 2L/a, computes the Joukowsky surge, and returns mitigation guidance: closure time targets, non-slam check valves, surge protection.
Cavitation Index Calculator
Sigma Method — Severity & Trim Guidance
Analyse cavitation and flashing risk from P1, P2, and fluid vapour pressure using the sigma method. Returns the severity regime (incipient, constant, damaging, choking, flashing) with engineering warnings and anti-cavitation trim recommendations.
Hydrotest Pressure Calculator
API 598 — Shell, Seat, Backseat Tests
Calculate API 598 hydrostatic and pneumatic test pressures for all ASME pressure classes (150–2500) and material groups. Returns shell test, seat liquid/gas test, and backseat test pressures in bar, psi, and kg/cm2 with test durations per NPS.
Actuator Torque Calculator
Quarter-Turn · Rising Stem · ISA 75.05
Estimate BTO, running, and end-load torque for ball, butterfly, gate, globe, plug, and needle valves. Covers ASME Class 150–2500, soft and metal seat materials, with safety factor guidance for actuator selection.
Face-to-Face Dimensions
ASME B16.10 — Gate · Globe · Ball · Butterfly
ASME B16.10 face-to-face and end-to-end dimension reference tables for gate, globe, ball, and butterfly valves. NPS 1/2"–24", Class 150–2500. Instant lookup for piping design and procurement.
Pipe Schedule Chart
ASME B36.10M — Sch 10 to XXS
Complete ASME B36.10M pipe schedule wall thickness (mm) and weight (kg/m) reference for NPS 1/2"–24". Covers Sch 10, 20, 40, 80, 120, 160, and XXS. Essential for nozzle loads and pipe stress.
Material Equivalency Chart
ASTM · EN/DIN · JIS · IS Cross-Reference
Cross-reference common valve body and trim materials across ASTM, EN/DIN, JIS, and IS standards. Includes WCB, CF8M, WC6, LCC, Duplex 2205, and more with composition and temperature limits.
Material Compatibility Checker
12 Fluids — Body · Trim · Seat
Interactive compatibility ratings for 12 process fluids: H2SO4, HCl, seawater, steam, crude oil, H2, ammonia, caustic, chlorine, LNG, H2S, and O2. Shows body, trim, and seat material suitability with engineering warnings and NACE flags.
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.