Ball Valve News & Technical Insights from J-VALVES
Double Block And Bleed Ball Valve: What The Bleed Valve Actually Proves
Double block and bleed is an arrangement, not a valveDouble block and bleed is quoted in almost every isolation specification and examined in almost none. It is not a feature a valve either has or lacks. It describes what an arrangement of sealing surfaces and a vent can do: hold pressure on two sid
Ball Valve Seat Replacement: What Can Be Repaired in Line
A ball valve seat is a wear part, not a permanent one. Which body styles allow in-line re-seating, and the tolerances that decide whether the repair holds.
Sanitary Clamp Ball Valves: 3-A, FDA And CIP Design Requirements
A sanitary clamp ball valve is not a polished standard valve. Cavity, seat wiping, Ra, drainability and 3-A paperwork decide whether it survives CIP.
Slurry Ball Valve Selection: Wear, Velocity, Seats And Materials
1. Slurries do not wear valves out; velocity doesA ball valve in clean water service can run for twenty years. The same valve in a 30 percent solids tailings line can be scrap in four months, and the difference is almost never the pressure class or the body material. Abrasive wear scales roughly wit
Fire-Safe Ball Valve Design: The Metal Backup Seat Behind API 607
How a fire-safe ball valve survives API 607: the metal backup seat, graphite packing and body joint that keep sealing after the soft parts burn.
Metal Seated Ball Valve: Clearance, Thermal Growth And Leakage Class
Metal-seated ball valves seal on hardfaced contact, not polymer: how clearance, differential growth and seat spring load set the leakage class.
Trunnion Mounted Ball Valves: Spring-Loaded Seats, Low Torque And Double Block Design
Trunnion ball valves hold the ball on bearings so pressure never loads the seats. Compare spring seats, low torque, DBB and body styles for large lines.
Ball Valve End Connections: Flanged, Butt Weld, Socket Weld And Threaded
Flanged, butt weld, socket weld or threaded ends change installation, leak risk and cost. Compare ball valve end connections and how to choose.
Cryogenic Ball Valve Design: Bonnet Length, Materials and Cold Testing
Cryogenic ball valve design for LNG: extended bonnet length, CF8M impact testing, PCTFE seats, cavity relief and the -196°C test that proves it.
Full Port Vs Reduced Port Ball Valves: Flow And Cost Trade-off
Full port and reduced port ball valves compared on Cv, pressure drop, pig passage and torque, with the numbers that decide the bore in a purchase order.