1. Product Overview
| Parameter | Specification |
|---|
| Product Name | Butterfly Valve, Wafer Type, Ductile Iron Body |
| Description | Butterfly Valve Wafer for Oil & Gas, Petrochemical, Water Treatment. KSA/UAE export. API compliant. AHMEDABAD manufacturer. Request enquiry. |
2. Salient Features
- Sizes: 2" to 24" (50mm to 600mm)
- Pressure Rating: PN 16/25
- Design: Double Offset (Double Eccentric)
- Face to Face: ISO 5752 Short
- Ductile Iron Body (ASTM A395) for Higher Strength
- Double Offset (Double Eccentric) Design for Superior Sealing
- Wafer Type Pattern for Easy Installation Between Flanges
- Disc Options: Ductile Iron / Al-Bronze / SS 316
4. Technical Specifications
| Parameter | Specification |
|---|
| Valve Type | Concentric Butterfly Valve, Wafer / Lugged / Double Flanged, Resilient Lined |
| Size Range | DN50 (2") to DN1200 (48") |
| Pressure Rating | PN10 / PN16 (10 bar / 16 bar) / Class 125# / Class 150# |
| End Connection | Wafer, Lugged, or Double Flanged compatible with ASME B16.1 / B16.5 / EN 1092-2 PN10/16 |
| Face-to-Face | API 609 Table 1 (Wafer/Lug) / ISO 5752 Series 20 / EN 558 |
| Design Standard | API 609 / BS 5155 / EN 593 / AWWA C504 |
| Testing Standard | API 598 / ISO 5208 / EN 12266-1 -- Shell Test 1.5 x PN, Seat Test 1.1 x PN |
| Seat Sealing | EPDM / NBR / Viton / Neoprene Concentric rubber lining; PTFE/PFA lining (optional) |
| Leakage Class | Bubble-tight zero leakage / ISO 5208 Rate A / ANSI/FCI 70-2 Class VI |
| Stem / Operating | Concentric shaft, splined or keyed disc-to-stem joint, Hand Lever / Gear Box / Pneumatic / Electric |
5. Materials of Construction
| Part | Standard Material | Exotic/Special Alloys (On Request) |
|---|
| Body (Wafer/Lug/DF) | Cast Iron IS 210 FG 260 / Ductile Iron GGG40 / Cast Steel WCB | NAB C95800, SS316 CF8M, SS904L |
| Disc | Ductile Iron GGG40 (Nylon/Epoxy Coated) / CF8 SS304 / CF8M SS316 | Super Duplex, NAB, PFA Encapsulated SS316 |
| Resilient Seat | EPDM (-20°C to 120°C) / NBR (-10°C to 80°C) / Viton (-10°C to 150°C) | Virgin PTFE (-30°C to 180°C) / Silicon |
| Stem / Shaft | Stainless Steel ASTM A276 Type 410 (13% Cr) / SS304 / SS316 | Monel K500, SS17-4PH |
| Shaft Bushings | PTFE-lined bronze bush / Carbon Steel backed dry bearings | Solid Bronze bushings |
| O-rings | NBR / EPDM (for shaft sealing) | Viton O-rings |
| Fasteners | Carbon Steel Zinc Plated Grade 4.6/8.8 | SS304 / SS316 fasteners |
6. Dimensions
Conforms to API 609 or ISO 5752. Bore sizes are full-bore from DN50 to DN1200. Concentric design Wafer and Lug dimensions. Gear boxes are recommended for sizes DN200 and above. General arrangement drawings (GAD) with dimensions and weights are provided for approval.
7. Testing & Inspection
| Test | Standard Reference | Acceptance Criteria |
|---|
| Body Hydrostatic Shell | API 598 / ISO 5208 | 1.5 x Rated Pressure (15 bar for PN10, 24 bar for PN16), 60s hold, zero visible leakage |
| Seat Hydrostatic (Water) | API 598 / ISO 5208 | 1.1 x Rated Pressure (11 bar for PN10, 17.6 bar for PN16), zero seat leakage (zero bubbles / Rate A) |
| Low Pressure Seat Air | API 598 / EN 12266-1 | 6 bar air pressure, 60s hold, zero bubbles/leakage |
| Visual & Casting Check | MSS SP-55 / IS 14846 | Casting visual check per MSS SP-55, thickness measurements, verify rubber lining thickness |
8. Design Standards & Codes
| Code/Standard | Description |
|---|
| API 609 / BS 5155 | Butterfly Valves: Double Flanged, Lugged, and Wafer Type (standard design code) |
| EN 1092-2 / B16.1 | Flanges and Flanged Fittings (dimensional standards compatibility) |
| EN 558 | Face-to-Face and End-to-End Dimensions of Valves |
| AWWA C504 | Rubber-Seated Butterfly Valves for municipal water transmission |
| ISO 5211 | Industrial valves -- Part-turn actuator attachments (actuator mounting pad standard) |
9. Documentation & Certification
| Deliverable | Details / Status |
|---|
| Material Test Certificates | EN 10204 2.2 / 3.1 Mill Certificates for Cast Iron/DI body and SS disc/stem chemistry |
| Pressure Test Reports | Hydrostatic and pneumatic test certificates signed by QA/QC inspectors |
| Warranty Certificates | 18 months warranty certificate from date of dispatch included |
10. General Notes
- Concentric design means the shaft is centered in the disc and body, offering compact face-to-face and low weight.
- Replaceable EPDM/NBR seats wrap around the body chest, isolating fluid entirely from the cast iron body.
- Lugged style valves are recommended for dead-end piping services to permit downstream pipe dismantling.
- Potable water valves are coated with non-toxic, electrostatic epoxy powders (min 250 μm thickness).
11. Contact & Enquiry
