2026-10-26
PN vs ASME Class: Valve Pressure Ratings for Buyers
Compare PN and ASME Class valve ratings, check pressure-temperature limits and flange compatibility, and prepare a clear industrial valve RFQ.
NEWS & GUIDES
Technical notes for valve procurement teams.
Compare industrial valve types, floating vs trunnion ball valves and body materials. Use practical RFQ and supplier-document checklists for your next project.
VALVE BUYER GUIDES
Choose a guide by procurement task
Use these technical guides to compare valve types and body materials, prepare a complete RFQ, and review supplier qualification documents. Each guide links to the relevant product families and the next procurement step.
01CHECK VALVE SELECTION
Swing vs Lift vs Dual Plate Check Valves: Selection Guide
Compare swing, lift and dual plate check valves by disc movement, installation, pressure drop and pump duty. Use the RFQ checklist to review the offered model.
2026-10-14 · 7 minRead article
02GATE VALVE SELECTION
Rising vs Non-Rising Stem Gate Valves: Clearance and Selection
Compare rising and non-rising stem gate valves for installation clearance, position indication and maintenance. Use a drawing review and RFQ checklist before ordering.
2026-10-13 · 6 minRead article
03VALVE CONNECTION SELECTION
Valve End Connections: Flanged vs Butt Weld, Socket Weld & Threaded
Compare flanged, butt-weld, socket-weld and threaded valve connections. Check pipe interfaces, maintenance access and project standards with a practical RFQ checklist.
2026-10-10 · 6 minRead article
04BALL VALVE SEAT SELECTION
Soft-Seated vs Metal-Seated Ball Valves: Selection Guide
Compare soft-seated and metal-seated ball valves by fluid, temperature, leakage requirements and trim design. Use a buyer checklist and KEHUA product links.
2026-10-08 · 6 minRead article
05VALVE INSPECTION & TESTING
Valve Pressure Testing: Shell vs Seat Tests & Buyer Checklist
Understand shell and seat leakage tests, review API 598 or ISO 5208 requirements, and specify an auditable valve pressure-test report before ordering.
2026-10-07 · 6 minRead article
06BUTTERFLY VALVE SELECTION
Double vs Triple Offset Butterfly Valves: Differences & Selection
Compare double and triple offset butterfly valves by geometry, seat construction, operating duty and test requirements. Includes a practical procurement checklist.
2026-10-04 · 7 minRead article
07BUTTERFLY VALVE SELECTION
Wafer vs Lug vs Flanged Butterfly Valves: Selection Guide
Compare butterfly valve connections, flange dimensions, end-of-line limits and pressure-temperature requirements. Use the RFQ checklist to review the offered model.
2026-10-03 · 7 minRead article
08BALL VALVE BUYER GUIDE
Side-Entry Trunnion Ball Valves: Buyer’s Selection Guide
Compare side-entry and top-entry trunnion ball valves, with manual, pneumatic and electric actuation RFQ checks, seat selection and model-specific document review.
2026-09-24 · 10 minRead article
09RFQ GUIDE
How to prepare an industrial valve RFQ that can be reviewed quickly
Prepare an industrial valve RFQ with a copyable fill-in checklist, quotation deviation table and checks for service data, materials, connections, actuation and documents.
2026-09-21 · 9 minRead article
010BALL VALVE BUYER GUIDE
Full Bore vs Reduced Bore Ball Valves: Buyer Guide
Compare full bore and reduced bore ball valves for pipeline pigging, flow restriction and project cost. Use the bore checklist to specify your valve RFQ.
2026-09-20 · 10 minRead article
011BALL VALVE SELECTION
Floating vs Trunnion Ball Valves: Selection Guide
Compare floating and trunnion ball valves by seat design, pressure, torque and project requirements. Use the buyer checklist to prepare a complete valve RFQ.
2026-09-18 · 9 minRead article
012MATERIAL SELECTION
Industrial valve materials: WCB, LCB, CF8M and duplex steel
Compare WCB, LCB, CF8M and duplex valve bodies with a material selection table and RFQ checklist covering fluid, temperature, corrosion and material records.
2026-09-17 · 10 minRead article
013VALVE SELECTION
Ball, butterfly or gate valve: start with the duty
Compare ball, butterfly and gate valves with a duty-based selection table, model-specific purchasing checks and links to KEHUA product series and technical guides.
2026-09-15 · 6 minRead article
014QUALITY DOCUMENTS
What to check in a valve qualification package
A document-review checklist for procurement teams comparing certificates, product evidence and project records.
2026-09-15 · 4 minRead article
INDUSTRIAL VALVE FAMILIES
Continue from the guide to the valve family that matches your isolation, control, non-return or project duty.
Resources
Need project-specific catalogues, data sheets or qualification files? Start with the technical resources and RFQ page.