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PRODUCTS / Concentric Butterfly valves / PTFE Seated Butterfly valves

Jeongdo Machinery’s Concentric PTFE Seated Butterfly Valve is designed for use with chemicals, corrosive fluids, and ultrapure water systems, utilizing PTFE material for both the disc and seat to ensure excellent chemical resistance.
Available in Wafer, Lugged, and Flanged types depending on connection requirements.

Concentric - PTFE Seated - Lugged

Option 1.
Oil-Free & Oil Removal: For DI water / UPW
(cleanroom processed)
Operator
Lever, Gear, Gear (with Lock Device), Gear (with Limit Switch), Gear Box Chain, Pneumatic actuator, Electric actuator
Certification
ISO 9001 CE/PED

Features and benefits

1. Bushing (4ea)
Reduce torque and absorb shock during stem rotation, ensuring smooth and stable operation.
2. O-Rings & V-Packings
Prevent shaft leakage and maintain sealing integrity.
3. Guide Hole
Equipped with 4 Guide Holes for accurate alignment and easy installation during piping assembly.
4. Wide Sealing Face
The seat features a broad contact surface with the flange, providing structural stability.
It also acts as a gasket, eliminating the need for a separate gasket.
5. Seat
Constructed with PTFE for excellent chemical resistance.
The internal rubber layer supports the PTFE lining, preventing deformation or damage and ensuring reliable sealing performance.
6. Disc
The disc surface is molded with PTFE or PFA, forming a fully integrated structure.
Precision-machined sealing surfaces ensure low operating torque and superior sealing capability.

Easy Maintenance
Allows valve replacement or inspection without full system shutdown, as pressure can be maintained on the opposite side even if one flange is removed.

Dead-End Service
Can be securely installed at the end of a pipeline without additional downstream support, making future line extensions and modifications easier.

Installation Flexibility
Easily integrates with flanged piping systems, and is compatible with various pressure classes and industrial environments, providing wide application versatility.

Reduced Leakage Risk
The precise bolting structure ensures accurate alignment between the valve and the pipeline, significantly reducing the risk of leakage at the connection point for stable system operation.

TECHNICAL SPECIFICATIONS

Design Standards
Design Standards
Valve Design API 609 Category A
ASME B16.34, KS B 1511
MSS-SP 67
Flange Drilling ASME B16.5
Face to Face API 609, ISO 5752
Specfication
Specfication
Body Type Wafer / Lugged / Flanged
Size 1.5 " ~ 64"
Flange Connection ASME 150
PN 10
KS JIS 10K/16K/20K
Temperature Range PTFE (-20℃~120℃)
PFA (-20℃~120℃)
Material Option
Material Option
Body Cast Iron, Ductile Iron
A216-WCB
A351-CF8 / CF8M / CF3M
DISC A351-CF8 / CF8M
A351-CF8+PTFE / CF8M+PTFE
A351-CF8+PFA / CF8M+PFA
Stem SS420
SS316
Seat PTFE LINED EPDM
PTFE
PFA

DOWNLOAD

Catalog
IMO
Instruction Manual
Certification
You may also check out other models.

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