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China PTFE/Teflon Seat Lug Butterfly Valve Suppliers - Factory Direct DN50-DN600 for Waterworks
Features
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Two Piece Split Body is standard Ductile Iron with available Carbon Steel and Stainless Steel
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Solid Teflon boot seat with a Silicone Seat energizer
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Solid Teflon encapsulated Disc has a minimum 1/8" (3MM) of pure virgin PTFE over a Stainless Steel core
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Belleville springs top and bottom of seat assures constantly energized stem seal aligned with PTFE bearings
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True ISO-5211 mounting Pad AND stem
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Operators include Top Trigger, Bottom Trigger 10 position or flip the notch plate over for infinite position. Iron Gears and Stainless-Steel gears, Aluminum or Stainless Steel Pneumatic Actuators, Aluminum or 316 Stainless Steel Electric actuators; all handles are lockable and gears are lockable with locking attachment.
Materials Of Main Parts
| ITEM | PART NAME | MATERIAL |
|---|---|---|
| 1 | Body Material | WCB / Ductile Iron / CF8 / CF8M Etc. |
| 2 | Seat Material | PFA / PTFE |
| 3 | Stem Material | SS420 / SS410 / SS416 / SS316 / SS304 / Duplex Stainless Steel Etc. |
| 4 | Disc Material | WCB+PTFE / CF8+PTFE / CF8 / CF8M / CF3M / CF8+PFA / WCB+PFA Etc. |
| 5 | Hand Lever | Malleable Iron / Stamping Steel / Aluminum / Stainless Steel |
| 6 | Bushing | PTFE / Bronze |
| 7 | O Ring | NBR / EPDM / VITON |
Valve Standard
| Category | Details |
|---|---|
| Type | Wafer |
| Face to Face | API609, EN593, EN558-1 Series 20, DIN3202 K1, ISO5752 |
| Flange Drilling | EN1092 PN10 / PN16 / JIS / ANSI150 / AS Table D/E |
| Mounting Flange | ISO5211 |
| Pressure Rating | PN10, PN16, 150PSI, 200PSI, Class 150 |
| Application | HVAC, Water Supply & Sewage, Food & Beverage, Chemical / Petrochemical Processing, Power and Utilities, Paper and Pulp, Marine |
Dimensions (mm)
More Details
Frequently Asked Questions
Q
What body materials are available for this PTFE-coated butterfly valve?
The valve body is standard Ductile Iron, with optional Carbon Steel (WCB) and Stainless Steel (CF8, CF8M) available to suit different application requirements and corrosion resistance needs.
Q
What is the purpose of the Belleville springs in this valve design?
The Belleville springs are positioned at the top and bottom of the seat to ensure a constantly energized stem seal. This design keeps the PTFE bearings properly aligned and maintains a reliable, leak-free seal throughout the valve's service life.
Q
Is this butterfly valve compatible with ISO-5211 actuator mounting?
Yes. The valve features a true ISO-5211 mounting pad and stem, ensuring direct compatibility with a wide range of actuators including pneumatic (aluminum or stainless steel) and electric actuators (aluminum or 316 stainless steel), as well as gear operators and manual handles.
Q
What pressure ratings does this valve support?
This butterfly valve supports pressure ratings of PN10, PN16, 150PSI, 200PSI, and Class 150, making it suitable for a broad range of industrial and commercial piping systems.
Q
What industries and applications is this valve designed for?
This valve is engineered for a wide variety of applications including HVAC systems, water supply and sewage, food and beverage processing, chemical and petrochemical processing, power and utilities, paper and pulp industries, and marine environments.
Q
What operator and handle options are available for this valve?
The valve supports multiple operator configurations: Top Trigger, Bottom Trigger with 10-position locking, or an infinite-position option by flipping the notch plate. Iron and stainless steel gear operators are available, along with aluminum or stainless steel pneumatic and electric actuators. All handles and gear operators include lockable options with locking attachments for added safety and control.