Two Way PTFE Sleeved Plug Valve manufacturer, factory and supplier. Two way PTFE sleeved plug valve is a type of plug valve that uses a sleeve between the body and the plug. Two way PTFE sleeved plug valve sleeve is used to enhance smooth rotation of the plug without causing wear. This valve is very durable relative to the lubricated one and it can last for years without being replaced. Two way PTFE sleeved plug valve manufacturers design this valve for use with a manual handwheel or by use of actuators. This valve operates by making a quarter turn of the handwheel. This forces the valve plug to rotate aligning its plug port collinear to the valve port. As such, the fluid finds the valve open and thus flows. To close the valve, the handwheel is again rotated in the opposite direction where it aligns the plug port normal to the fluid flow path. This blocks the fluid from flowing through the valve.
Size Range : NPS ½ to NPS 24
Class Range : ANSI Class 150 – Class 600
Design Standard : ASME B16.34
End Connection : Flanged ASME B16.10
Valve Body Material : Carbon Steel / Stainless Steel
Temperature Range : -30°C to 260°C
Sleeve : PTFE / PPL or Others
Operation : Manual Lever / Pneumatic / Electrical
What is a Two Way PTFE Sleeved Plug Valve?
Two Way PTFE Sleeved Plug Valve uses a sleeve component installed around the valve plug to maintain a continuous seal. The sleeve is used to provide the lubricity needed for the plug to rotate smoothly resulting in fast opening and closing of fluid flow. Sleeved plug valve manufacturers also use this sleeve to help reduce frequent maintenance needed in the lubricated type of valves as well as give the valve long service life. Two way PTFE sleeved plug valve is a quarter valve,This is because they operate by turning the valve plug for a 90 degree angle to open or close. This type of sleeved plug valve operates manually or by use of actuators. Two way PTFE sleeved plug valve is designed such that the plug moves up slightly when opening fluid flow to ensure it leaves some clearance with the valve seat to avoid wear which can reduce service life of the plug. 2 Way Non-lubricated Plug Valve has a tight shut-off and is used in various industrial applications such as waste water treatment, food processing, chemical processing, oil and gas among others.
Two Way PTFE Sleeved Plug Valve construction
In a Two Way PTFE Sleeved Plug Valve, each component has its specific purpose for creating this robust valve design. The main components of a sleeve plug valve are the body, sleeve, cover, top seal, and cover are considered as main valve components.
Body: The body of a sleeved plug valve is cast as a one-piece that provides high integrity. This casting has integral design features that are important for creating key benefits of the product being cavity-free and maintenance-free.
The body casting has 360-degree lips around the ports which keep the sleeve in place preventing sleeve rotation while the valve is being operated. The sleeve relief area present in the body allows the PTFE sleeve to expand and contract during the temperature changes, this relief area also assists in controlling the valve torque.The body of the sleeve plug valve also consists of horizontal and vertical ribs which enables strong sealing capabilities between the sleeve and the plug by creating compression that is needed to maintain the sleeve in its place along with 360-degree lips.
Sleeve: A fluorocarbon sleeve that keeps the tapered plug in place and maintains a continuous seal. The sleeve provides the lubricity required to turn the valve, allowing it to open and close quickly, function without maintenance, be non-sticky, and last longer.
Top Seal: In Two Way PTFE Sleeved Plug Valve design, the top seal ensures that fugitive emissions are kept to a minimum. It complies with or surpasses the most strict regulatory criteria currently in effect. The integrated, flexible graphite stem seal and the graphite cover seal ring ensure sealing where the stem and at the body/cover connects.
Cavity-free design: The cavity-free design is a significant feature of the product and is crucial in applications where solids are present in the media. The key valve components the body the sleeve and the plug are in close contact with each other creating the cavity-free design. This means that there are no spaces between the plug and the body that can trap media when the valve is being operated.
How does a Two Way PTFE Sleeved Plug Valve work?
Two Way PTFE Sleeved Plug Valve operates by using a handwheel/hand lever or by use of an actuator. Whether the Two Way PTFE Sleeved Plug Valve is manual or automatic, the working mechanism is the same. Two Way PTFE Sleeved Plug Valve starts when the handwheel/ actuator rotates forcing the stem as well as the plug valve plug to rotate. To open the valve, the handwheel/actuator rotates the plug valve stem for a quarter turn in the clockwise direction. The rotation of the stem in the clockwise direction forces the valve plug to rotate for a 90o degree where it aligns the plug port collinear to the valve port. This creates an unobstructed path for the fluid to flow through the sleeved plug valve. To close the fluid flow, the handwheel/actuator rotates in the counterclockwise direction for a quarter turn. This then forces the stem and thus the plug to make the same 90o degree turn which positions the plug port normal to the plug valve port. This ensures the valve plug is blocking the fluid flow and thus no fluid can flow through the sleeved plug valve. For throttling fluid flow, the handwheel is rotated for an angle of around 45o degrees to allow some space for the fluid to flow through the valve. Two Way PTFE Sleeved Plug Valve manufacturers recommend use of this valve in throttling fluid flow where pressure drop will not cause technical challenges since throttling causes pressure drop by a great margin.
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