Technical Guides
A close look at the trapped cavity problem in ball valves, how single and double piston effect seats behave, and how to specify and operate valves for cryogenic and volatile media.
Technical Guides
An engineer's guide to the mechanics of gate valve wedging and stuck gates — solid, flexible and parallel gate designs, thermal lock, maintenance practice, and smarter selection.
Technical Guides
A practical materials-engineering view of titanium valve selection: how the passive film actually works, where titanium beats duplex and super austenitic steels, and the common specification mistakes that turn a premium material into an expensive one.
Technical Guides
HF is one of the most deceptive corrosives in the process industries. This article explains how Monel 400 and K500 perform in hydrofluoric acid, where their limits lie, and how to specify bodies, trims, springs and soft seals for reliable long-term valve service.
Technical Guides
Sulfuric acid punishes the wrong stainless steel quickly. This article compares Alloy 20 and 904L across concentration and temperature windows, chloride pitting resistance, weldability and cost, and lays out a clear decision logic for valve material selection.
Technical Guides
Wet chlorine and hydrochloric acid destroy most metals with alarming efficiency. This article explains how C276 and C22 earn their keep in these services, where the two alloys differ, and how to specify bodies, trims and soft seals without overpaying.
Technical Guides
A materials guide to nickel aluminum bronze for seawater valve duty — how the kappa-phase microstructure and self-healing surface film work, where NAB beats bronze, 316 and duplex, and what to check in castings, weld repairs and maintenance.
Technical Guides
A practical engineering comparison of Inconel 625 and 825 for valve bodies and trim, covering metallurgy, corrosion mechanisms, fabrication routes and how to choose between them.
Technical Guides
A valve engineer's guide to super austenitic stainless steels: PREN, seawater and bleach-plant performance, comparison with duplex steels, and selection guidance.
Technical Guides
What valve buyers and engineers need to know about Grade 91 and 92 forged valve bodies: metallurgy, heat treatment, weld repair rules, hardness verification and order-stage requirements.
Technical Guides
How ductile-to-brittle transition behavior is verified for low-temperature valve service — Charpy V-notch testing, code exemption rules, material selection and procurement clauses.
Technical Guides
Why stainless valves rust despite being stainless, what pickling and passivation actually do, which acceptance tests prove the result, and how to write the procurement clause.