What is a Ballcentric plug valve?
The Ballcentric® Plug Valve Plug: High integrity corrosion-free sealing is achieved by a variety of abrasion resistant elastomers which protect the plug right up to the trunnions. When assembled, the light compression of the elastomers onto PTFE thrust washers, prevents entry of abrasive materials into the bearings.
What does a plug valve do?
Usually available in cylindrical or conical shapes, plug valves are quarter-turn manual motion valves used for stopping or starting the flow of fluid. They offer on-off, diverting, as well as basic moderate throttling services. Read on for an overview on plug valves, along with their types and applications.
What is lubricated plug valve?
Lubricated plug valve consists of a cavity in the middle of plug along its axis. This cavity is closed at the bottom and fitted with a sealant-injection fitting at the top. The sealant is injected into the cavity, and a check valve below the injection fitting prevents the sealant from flowing in the reverse direction.
Are plug valves better than ball valves?
Plug valves offer better performance in the term of cutting than ball valves, but that doesn’t show obviously. The sealing surface of the plug valve is much larger than the ball valve and supplies a better sealing effect, but a greater torque and small diameter.
When would you use a plug valve?
Plug valves are used to provide bubble tight shut-off in fluid services like air, gas, vapor, hydrocarbon, and more. Plug valves are a popular valve to use when dealing with slurries, mud, and sewage applications as they have a larger surface area and allow unrestricted flow of the medium.
Where are lubricated plug valves used?
Lubricated plug valves perform well in processes that utilize fluids which carry mildly abrasive particles such as dirty upstream applications, gas pipeline systems that need bypass valves, and as blow-down valves on valve stations and kicker valves.
Does a plug valve have a flow direction?
It uses a cylindrical or tapered plug (plug-shaped disk) to permit or prevent straight-through flow through the body. Plug valves offer a straightway passage through the ports so that fluid can flow through the opening plug with a minimum of turbulence. Flow can be in either direction with fully open or fully closed.
Is plug valve full bore?
Full Bore plug valves provide the same lubricated plug valves features, with the addition of the “FULL BORE” capability, which makes these valves suitable for being installed as “Piggable” mainline isolation valves, or to fit any service where no ID bore restriction is allowed ( CV losses, High velocity media or …
Is plug valve same as globe valve?
The main difference between these two types is the way they close. A globe valve uses a plug (stem) that closes against the flow, and a ball valve has a gate (ball) that closes across the flow. Globe valves are good for regulating flow, whereas ball valves are better for on/off control without pressure drop.
