Ball Valve News & Technical Insights from J-VALVES
Ball Valve Condition Monitoring: Which Signals Actually Predict A Failure
Torque signatures, acoustic emission, differential pressure and digital twin residuals: which measurements find a failing ball valve early.
Ball Valves in SWRO Desalination: The High Pressure Section Where Ordinary Seawater Valves Fail
Why SWRO high pressure valves fail early: recovery arithmetic, crevice temperature, ERD ripple, scale, letdown cavitation and surge.
Air Test And Water Test For Ball Valves: What Each Medium Can Prove
A ball valve can pass a hydrostatic seat test and still leak gas. Why air and water prove different things, and how to read a bubble, decay or helium test.
Ball Valve Flange Bolting: Preload, Relaxation And The Fasteners That Decide Leakage
A weeping flange is rarely the gasket. Preload, torque scatter, hardness limits and thermal relaxation decide whether the joint holds at 100 bar and 400 C.
Ball Valve Bypass And Pressure Equalization: What The Small Valve Around The Big One Is For
A bypass around a ball valve does four different jobs. Why equalizing protects the seat, where to tap in, and why an open bypass is a leak path.
Trunnion Ball Valve Bearings: What Carries A Fixed Ball, And What Fails First
A fixed ball still stands on bearings. The thrust path from ball to body, why rolling elements are wrong here, and four symptoms that name a bearing fault.
Ball Valves in Hazardous Areas: ATEX And IECEx for The Whole Assembly
Zone, EPL, gas group and T class decide the actuator on a ball valve, not the body. How the assembly is certified, wired and earthed in an Ex area.
Ball Valve External Coating: ISO 12944 Systems And The CUI Trap
A valve coating fails at edges, flange faces and the 50 to 175 C band, not in the tin. How to pick the ISO 12944 system, the DFT and the details that survive.
Ball Valve Installation Orientation: Stem Up, Stem Down And The Load You Cannot See
Ball valve installation orientation: what stem up really decides, why a sideways cavity cannot drain, and how pipe load makes a tested valve leak on site.
Ball Valve Cycle Life: What An Endurance Test Proves, And What It Leaves Out
Ball valve cycle life: what a cycle count really measures, why the torque trend matters more than leakage, and how to write an endurance test into the order.