The seat sealing surface is critical for bubble‑tight shut‑off. Three common materials are 13Cr stainless steel, Stellite cobalt alloy, and hard alloys like tungsten carbide. The wrong choice leads to early leakage or [2026-06-03]
A safety valve that opens before reaching set pressure is called nuisance operation or premature opening. It wastes media, harms the environment, and damages sealing surfaces. The causes are often unrelated to overpressu [2026-06-01]
A safety valve may look fine, but when the set pressure is reached, it fails to open. In many such incidents, spring aging is the hidden culprit. Long‑term compression stress, combined with heat and vibration, causes th [2026-05-27]
In severe services – corrosive, viscous, polymerising, or solids‑laden fluids – the safety valve cannot contact the process medium directly. A rupture disc installed at the valve inlet isolates the medium, keeping the [2026-05-25]