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PRODUCTS / Concentric Butterfly valves / Rubber Seated Butterfly valves

Jeongdo Machinery's Concentric Rubber Seated Butterfly Valves are available in Wafer, Lugged, Grooved, and Flanged types, depending on the connection method.
They are designed to suit a wide range of operating conditions and are applicable for various fluids such as water, ultrapure water, oil-free systems, seawater, and chemicals, as well as different pressure requirements.

Concentric - Rubber Seated – Flanged Butterfly Valve

This Concentric Rubber Seated Valve with flanged connections on both sides of the body is designed for versatile use across various industrial applications.

It offers easy maintenance and delivers excellent sealing performance, even in high-temperature and high-pressure environments.

Option 1.
NBR seat for use with light oil service
Operator
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. Body
As a flanged type, it provides excellent leak prevention, easy centering and installation, and maintains stability under vibration and pressure fluctuations.
2. Seat
Hard Back Ring structure minimizes seat deformation and enhances sealing performance.
3. DISC
Manufactured by Investment casting for a uniform surface that prevents seat damage.
The hemispherically machined sealing edge reduces torque and ensures a tight, reliable seal.
4. One-Piece Stem
A rigid structure that minimizes deformation under pressure and provides excellent sealing reliability.
5. Bushings & O-Rings
Equipped with O-rings, bushings, and V-packings to prevent shaft leakage.
This secondary sealing structure completely isolates fluid between the body and seat.

Sealing Performance
Full flange-face contact ensures excellent leak prevention, with stable performance under vibration and pressure fluctuations.

Pressure & Size Compatibility
Suitable for high-pressure and large-diameter pipelines; robust structure allows use in medium to large-scale systems.

Seismic Resistance & Durability
Designed to withstand vibration, load, repeated operation, and external impacts.

Precision Installation
Easy flange alignment improves piping accuracy and enhances overall system reliability.

Standard Compatibility
Fully compatible with ANSI, JIS, KS and other international flange standards, ensuring easy replacement and system expansion.

Easy Maintenance
Can be disassembled per flange section, allowing for simple inspection and servicing.

TECHNICAL SPECIFICATIONS

Design Standards
Design Standards
Valve Design API 609 Category A
ASME B16.34
MSS-SP 67
Flange Drilling ASME B16.5
Face to Face API 609, ISO 5752
Specfication
Specfication
Body Type Wafer / Lugged / Flanged
Size 1 1/4 " ~ 64"
Flange Connection ASME 150
PN 10/16
Temperature Range EPDM (-20℃~120℃ )
NBR (-10℃~80℃ )
Material Option
Material Option
Body Cast Iron / Ductile Iron
A216-WCB
A351-CF8 / CF8M / CF3M
DISC A351-CF8 / CF8M / CF3M
Monel, Duplex
Stem SS420, SS431
SS316 / SS630
Seat EPDM
NBR

DOWNLOAD

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

NOTICE

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