Wafer-Type Butterfly Valve (Vulcanized Rubber Seat)
Wafer-Type Butterfly Valve (Vulcanized Rubber Seat) - Image 2
Wafer-Type Butterfly Valve (Vulcanized Rubber Seat) - Image 3

Wafer-Type Butterfly Valve (Vulcanized Rubber Seat)

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Description

Wafer-Type Butterfly Valve (Vulcanized Rubber Seat) – Technical Datasheet

Model: D71X-16C
Type: Centerline Design, Wafer-Type
Seat Type: Vulcanized Rubber Cartridge Seat

I. Key Specifications

Parameter Value
Nominal Diameter DN50 ~ DN600
Pressure Rating PN10/16 (Class 150)
Temperature Range -30°C to +130°C (Vulcanized EPDM)
-20°C to +150°C (Vulcanized FKM)
Connection Wafer-Type (ASME B16.5 / EN 1092-1)
Actuation Lever, Gear, Pneumatic, Electric

II. Material & Construction

Component Material Key Feature
Body Ductile Iron (GGG50) / SS304/316 Epoxy Coated
Disc SS304/316 with Nylon Coating Zero-Interference Design
Stem Stainless Steel 17-4PH (Hardened) Anti-Blowout Structure
Valve Seat Vulcanized Rubber Cartridge:
– Seal Material Vulcanized EPDM/FKM/NBR Bonded to SS304 Carrier
– Core Structure Stainless Steel Cage + Rubber Matrix Chemical Fusion Technology
Sealing System Bidirectional Metal-Enhanced Seal ANSI Class VI Leakage Control

III. Vulcanized Seat Advantages

  1. Superior Bonding

    • Rubber chemically fused to metal carrier, eliminating seal displacement.

  2. Extended Service Life

    • 3× higher extrusion resistance vs. pressed seats (per ISO 1817 aging test).

  3. Thermal Stability

    • Withstands 20,000+ thermal cycles (-30°C ↔ +130°C).

  4. Maintenance Efficiency

    • Seat replaceable in 10 minutes without special tools.

IV. Performance Data

Test Standard Result
Seal Leakage ISO 5208 A 0 bubbles/min (ANSI Class VI)
Cyclic Endurance MSS SP-67 >150,000 cycles (EPDM seat)
Compression Set ASTM D395 ≤15% (70h @ 100°C)
Fire Safety API 607 (Optional) 30-min fire survival

V. Design & Testing

  • Seat Vulcanization Process:

    • Step 1: SS304 carrier grit-blasted for adhesion.

    • Step 2: Rubber compound molded under 180°C/5MPa.

    • Step 3: Post-cure stabilization (48h @ 100°C).

  • Pressure Tests:

    • Shell Test: 2.4 MPa (PN16)

    • Seat Test: 1.76 MPa bidirectional

VI. Certifications

Standard Code Compliance
Water Safety NSF/61, WRAS EPDM/FKM seats
Industrial ISO 5211 Actuator mount
Corrosion ISO 9227 720h salt spray

VII. Options

  • Seat Materials:

    • EPDM: Water/steam (<130°C)

    • FKM: Oils, acids (<150°C)

    • NBR: Fuels, solvents (<100°C)

  • Special Designs:

    • Cryogenic extension stems (-196°C)

    • ATEX-certified actuators

VIII. Applications

  • Chemical Processing: Acid/alkali lines (FKM seats)

  • Power Plants: Cooling water (EPDM seats)

  • Pulp & Paper: Slurry media (wear-resistant NBR)

  • Food & Pharma: CIP/SIP systems (FDA-compliant EPDM)

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