Rubber-Lined Butterfly Valve -- Mining Slurry Service
Technical Datasheet -- Heavy-Duty Rubber-Lined Butterfly Valves for Abrasive and Corrosive Service
Document No.SV-DATA-RLBV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
Heavy-duty rubber-lined butterfly valves for abrasive mining slurry, ash handling, and corrosive chemical service. Thick bonded EPDM, NBR, or Viton liner (3 to 6 mm) protects the body from erosion. SS316 disc with ENP, chrome, or polyurethane coating resists particle impingement. API 609 / MSS SP-67 compliant. Gear operator standard for controlled operation in abrasive service.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Rubber-Lined Butterfly Valves |
| Category | Butterfly Valves |
| Size Range | 3" to 48" (DN80 to DN1200) |
| Pressure Class | Class 150 / PN10 / PN16 |
| End Connections | Wafer or Lug type per API 609 / MSS SP-67 |
| Body Material | ASTM A216 WCB with thick bonded rubber liner / ASTM A395 Ductile Iron with rubber liner |
| Liner Material | EPDM (water / slurry) / NBR (oil / hydrocarbon) / Viton FPM (chemical) / Hypalon (ozone / UV) -- thickness 3 to 6 mm depending on abrasion level |
| Disc Material | SS316 with ENP or chrome plating / SS316 with polyurethane coating (abrasive service) / NAB (marine) |
| Shaft Material | ASTM A276 316 SS with Stellite bushing or bronze bushing |
| Face-to-Face | API 609 short pattern |
| Operation | Gear operator (all sizes -- lever not recommended for abrasive service) / Pneumatic / Electric actuator |
| Leakage Class | API 598 / EN 12266-1 -- rubber-lined standard leakage acceptable per MSS SP-67 |
| Temperature Range | -20 deg C to +120 deg C (EPDM) -- up to +150 deg C (NBR) |
Materials of Construction
| Component | Material |
|---|
| Carbon Steel | ASTM A216 WCB with bonded rubber liner (standard) |
| Ductile Iron | ASTM A395 with bonded rubber liner (economical option) |
| Liner Options | EPDM (water / slurry), NBR (oil), Viton FPM (chemical), Hypalon (ozone / UV resistant) |
| Disc Coatings | ENP or chrome plating (standard), polyurethane (heavy abrasive), NAB (marine) |
Testing & Inspection
| Test | Requirement |
|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | API 609 Category A, MSS SP-67 |
Notes
- Slurry particle size, concentration, and chemical composition must be specified by the purchaser for correct liner material and thickness selection.
- For highly abrasive service (mining tailings, power plant ash), polyurethane disc coating and 6 mm liner thickness are strongly recommended.
- For dead-end service, lug body with tapped holes is required; wafer body is not suitable for dead-end isolation.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
