Rubber Bonded Concentric Butterfly Valve – DN600 PN16 Lugged
Description
TECHNICAL DATA SHEET
Rubber Bonded Concentric Butterfly Valve – DN600 PN16 Lugged
1. GENERAL DESCRIPTION
The Rubber Bonded Concentric Butterfly Valve is a high-performance, centre-line design butterfly valve featuring a vulcanised rubber liner permanently bonded to the valve body. The rubber is injection moulded directly onto the valve body forming a permanent bond, eliminating the risk of deformation or dislocation of the liner and making the valve suitable for vacuum conditions.
This lugged-type valve is designed for dead-end service, allowing full-rated unidirectional isolation at line ends. It is ideally suited for water, neutral liquids, and a wide range of industrial applications.
2. PRODUCT SPECIFICATIONS
| Parameter | Specification |
|---|---|
| Valve Type | Concentric (Centre-line) Butterfly Valve |
| Connection Type | Lugged (Threaded inserts for dead-end service) |
| Nominal Diameter (DN) | DN600 (24″) |
| Pressure Rating | PN16 (16 bar / 232 psi) |
| Design Standard | EN 593 / API 609 / ISO 10631 |
| Face-to-Face Standard | EN 558 Series 20 |
| Flange Drilling | EN 1092-2 PN10/16 |
| Test Standard | EN 12266-1 / ISO 5208 / API 598 |
| Closing Direction | Clockwise to Close |
3. MATERIALS OF CONSTRUCTION
| Component | Material | Specification / Notes |
|---|---|---|
| Body | Ductile Iron (Nodular Cast Iron) | EN-GJS-500-7 / GGG50 |
| Body Coating | Epoxy / Polyurethane Coating | Min. 200-250µm thickness, Blue RAL 5005 |
| Disc (Trim) | Stainless Steel | AISI 316 / CF8M (1.4408) |
| Stem (Shaft) | Stainless Steel | AISI 420 / 17-4PH |
| Seat / Liner | EPDM Rubber | Vulcanised/Bonded directly to body |
| Bearings | PTFE / Bronze composite | Low-friction design |
| Fasteners | Stainless Steel A2 |
4. OPERATING PARAMETERS
| Parameter | Value |
|---|---|
| Maximum Working Pressure | 16 bar |
| Shell Test Pressure | 24 bar (1.5 x PN) |
| Seat Test Pressure | 17.6 bar (1.1 x PN) |
| Leakage Rate | Zero leakage (Bubble-tight) – ISO 5208 Rate A / ANSI Class VI |
| Operating Temperature Range | -30°C to +120°C (EPDM seat) |
| Vacuum Service | Suitable for full industrial vacuum |
| Flow Characteristic | Approximately linear, low pressure drop |
| Direction of Flow | Bi-directional |
5. DIMENSIONS & WEIGHT (DN600)
| Parameter | Value |
|---|---|
| Face-to-Face Dimension | Per EN 558 Series 20 (typical: 90 mm for Series 13) |
| Approximate Weight | 240 – 295 kg (gear operated) |
| ISO Mounting Flange | ISO 5211 top flange for direct actuator mounting |
| Flange Drilling | EN 1092-2 PN16 |
Note: Exact face-to-face dimensions and weights may vary slightly depending on manufacturer and specific configuration. Please refer to manufacturer-specific drawings for precise values.
6. OPERATION
| Parameter | Specification |
|---|---|
| Standard Operation | Handwheel-operated Worm Gearbox |
| Alternative Operation | Chain wheel operator (as specified) |
| Mounting Interface | ISO 5211 top flange |
| Shaft Design | Anti-blow-out shaft design |
For DN600, gear or chain wheel operation is standard due to the torque requirements of larger diameters.
7. DESIGN FEATURES
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Bonded Vulcanised Liner: EPDM rubber is permanently bonded to the body, providing excellent compression set recovery and eliminating liner displacement
-
Streamlined Disc: Optimised disc profile with machined and polished edges for minimal flow resistance and low operating torque
-
Anti-Blow-Out Shaft: Stem retention design prevents accidental shaft ejection under pressure
-
Low-Friction Bearings: PTFE/bronze composite bearings reduce operating torque and extend service life
-
Long Neck Body: Accommodates pipe insulation requirements
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Epoxy Coating: Corrosion-resistant coating with minimum 200μm thickness
8. APPLICATIONS
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Water supply and distribution systems
-
Wastewater treatment plants
-
HVAC systems
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Industrial process lines
-
Neutral liquids and treated water
-
Vacuum applications
9. TESTING & CERTIFICATIONS
| Parameter | Specification |
|---|---|
| Shell Test | 1.5 x PN (24 bar for PN16) |
| Seat Leakage Test | 1.1 x PN (17.6 bar for PN16) |
| Leakage Class | ANSI Class VI / ISO 5208 Rate A |
| Design Standard | EN 593 |
| Pressure Equipment Directive | PED 2014/68/EC |
| Flange Standard | EN 1092-2 PN10/16 |
10. NOTES
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All dimensions and weights are approximate and subject to manufacturing tolerances.
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Temperature limits are dependent on the specific EPDM compound and media compatibility.
-
For specific media compatibility, please consult the manufacturer.
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Chain wheel operation can be supplied as an alternative to handwheel gearbox upon request.
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The lugged design allows for dead-end service and line-end isolation.
