Wafer-Type Butterfly Valve (Cartridge Seat)
Description
Wafer-Type Butterfly Valve (Cartridge Seat) – Technical Datasheet
Model: D71X-16C (Example)
Type: Centerline Design, Wafer-Type
Seat Type: Cartridge Replaceable Seat
I. Basic Parameters
| Item | Specification |
|---|---|
| Nominal Diameter (DN) | DN50 ~ DN600 (Optional) |
| Nominal Pressure (PN) | PN10/16 (Class 150), JIS 10K/16K |
| Temperature Range | -20°C to +120°C (EPDM Seat) -10°C to +180°C (PTFE Seat) |
| Applicable Media | Water, Air, Oil, Weakly Corrosive Liquids |
| Connection Type | Wafer-Type (ASME B16.5 / EN 1092-1/JIS B2220) |
| Actuation | Lever, Gear, Pneumatic, Electric |
II. Construction & Materials
| Component | Material | Description |
|---|---|---|
| Body | Ductile Iron (GGG50) Carbon Steel (WCB) Stainless Steel (CF8/CF8M) |
Epoxy Coated/Ni-Plated |
| Disc | SS304/316 Ductile Iron + Nylon Coating |
Centerline Design, Low Flow Loss |
| Stem | Stainless Steel (416/304/316) | Through-Rod, Anti-Blowout |
| Seat | Cartridge Seat: – Seal: EPDM/NBR/VITON/PTFE – Support Ring: SS304 + Rubber Composite |
Quick Replacement Without Body Removal |
| Sealing Type | Bidirectional Elastic Sealing | Zero Leakage (ANSI FCI 70-2) |
III. Cartridge Seat Features
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Modular Design: Seat pre-assembled in stainless steel retainer ring.
-
Rapid Replacement: Maintenance without pipeline disassembly (valve removed between flanges).
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Zero-Leakage Sealing: Uniform compression under pressure fluctuations.
-
Extrusion Resistance: SS skeleton prevents deformation (10x longer life vs. standard seats).
IV. Performance Specifications
| Parameter | Value |
|---|---|
| Sealing Class | ANSI Class VI / ISO 5208 A |
| Flow Coefficient (Cv) | Refer to size-specific chart (e.g., DN100: Cv≈500) |
| Operating Torque | ≤30% of standard butterfly valves |
| Cycles | ≥100,000 (EPDM Seat) |
| Fire-Safe Option | API 607 (Optional) |
V. Design & Testing
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Installation: Sandwiched between ANSI/EN flanges (no threaded holes in body).
-
Shell Test: 1.5×PN (EN 12266).
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Seat Test: 1.1×PN (bidirectional air/water).
-
Vacuum Test: 0.08 MPa (ISO 5208).
VI. Standards & Certifications
| Category | Standard |
|---|---|
| Valve Design | ISO 10631 / EN 593 / MSS SP-67 |
| Flange Face | RF (Raised Face) ASME B16.5 / EN 1092-1 |
| Fire Safety | API 607 (Optional) |
| Potable Water | WRAS/KTW (EPDM Seat) |
VII. Options
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Actuation: ISO 5211 mounting pad for pneumatic/electric actuators.
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Stem Extension: For insulated lines (-40°C to +230°C).
-
Position Indicators: Mechanical/electronic limit switches.
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Anti-Static Device: ISO 5211 compliance.
VIII. Applications
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HVAC: Chilled/heating water systems.
-
Industrial: Chemical processing, compressed air.
-
Water Treatment: Filtration, pumping stations.
-
Marine: Seawater cooling (316SS body).
