Ball Valve News & Technical Insights from J-VALVES
Ball Valve Spare Parts for Overseas Projects: The Wear Part List, The Quantity Math, And Four Traps
Why isolation valves fail on calendar time, not cycles. Wear part lists, Poisson stock maths, seat kit traps and the clauses that decide year six.
Ball Valves On A Bottom Loading Gantry: Creep, Dry Break And The Test That Proves Neither
A loading gantry cycles a ball valve far more than it is designed for and still cannot prove shut-off. Where creep starts, and what to specify.
Lined Ball Valves in Acid Service: The Liner Does Not Fail, The Steel Behind It Does
The valve came out of the line looking better than most valves that come out of a hydrochloric acid line. Three inch, PFA lined, cast body, Class 150, fourteen months in service on a 32 percent acid transfer duty at 55 to 60 degrees C, about forty open and close cycles a week. The paint was intact.
Ball Valves in Amine CO2 Capture: Heat Stable Salts, Rich Amine, And The Three Places The Body Thins
Rich amine at 110 C with heat stable salts is where capture plant ball valves fail. Materials, velocity limits, cavity gas and seat choice, with numbers.
Fail-Safe Ball Valve Actuators: Spring Return, Stored Air, And The Torque Nobody Checks
Spring return or stored air? The answer is a torque curve, not a datasheet box. Sizing, receiver volume, closing time and four silent failures.
Ball Valve Stem Leak: The Gland, The Backseat And The Repair That Cannot Be Done Live
A stem leak on a quarter turn valve is four different failures. What gland tightening buys you, why the backseat is usually absent, and what needs a shutdown.
Ball Valves in A Kraft Pulp Mill: Black Liquor, Green Liquor And The Cost of Choosing The Alloy by Habit
White liquor at pH 14 cracks carbon steel welds, black liquor sets solid below 100 C, green liquor dregs grind seats: alloy choice and torque in a kraft mill.
Slug Flow And Ball Valves: What Actually Arrives At The Seat
A slug is liquid mass with momentum, not a pressure spike. What changes at the seat, in the cavity and at the actuator when liquid reaches a ball valve.
Ball Valves in Direct Lithium Extraction: PH 1 Eluate, Gypsum Scale And 438,000 Cycles in Twenty-Five Years
Direct lithium extraction swings valves from pH 1 eluate to pH 12 caustic, 48 column switches a day and gypsum scale. Materials, seats and torque.
Ball Valves in Geothermal Brine: Silica Scale, Chloride Cracking And The Cooling Trap
Why geothermal brine destroys ball valves: retrograde silica scale, calcite at the flash point, chloride cracking above 60 C and the 250 C seat limit.