Deskripsi
WCB Wafer-Connected Triple-Eccentric Butterfly Valve with Worm Gear Operation
Model : D373H-16C DN200
Brand : Shanghai Valve Factory
Product Overview
The D373H-16C is a metal-seated, triple-eccentric butterfly valve designed for high-performance isolation in demanding industrial applications. Its wafer-type connection and worm gear operator make it compact and suitable for tight spaces, while the triple-offset geometry ensures zero leakage and long service life under high temperature and pressure.
- Type: Triple-eccentric butterfly valve
- Connection: Wafer type (between flanges)
- Operation: Worm gear (manual gearbox)
- Body Material: WCB (cast carbon steel)
- Seal Type: Metal-to-metal (13Cr or Stellite)
- Design Standard: API 609 / GB/T 12238
Specifications (DN200, PN16):
| Parameter | Value |
|---|---|
| Nominal Diameter | DN200 (8″) |
| Pressure Rating | PN16 (1.6 MPa) |
| Temperature Range | –29°C to +350°C |
| Flow Direction | Bidirectional |
| Leakage Class | Class VI (zero leakage) |
| Face-to-Face Length | ~90–110 mm (wafer type) |
| Flange Compatibility | GB/T 9113 / EN 1092-1 / ANSI 150 |
| Torque Requirement | Low (due to triple offset) |
| Actuation Option | Manual worm gear (standard); electric/pneumatic optional |
Material List:
| Component | Material |
|---|---|
| Body | WCB (Cast Carbon Steel) |
| Disc | WCB / CF8 / CF8M |
| Stem | SS410 / SS304 |
| Seat Ring | 13Cr / Stellite overlay |
| Bearings | PTFE / Graphite composite |
| Packing | Graphite / PTFE |
| Gearbox Housing | Cast Iron / Aluminum Alloy |
| Fasteners | Carbon Steel / Stainless Steel |
The metal-seated design with Stellite overlay ensures durability in steam, gas, and abrasive media.
Dimensions (DN200, PN16 Wafer Type):
| Dimension | Value (mm) |
|---|---|
| L (Face-to-Face) | ~90–110 |
| D (Flange OD) | ~340 |
| D1 (Bolt Circle) | ~295 |
| D2 (Bore) | ~250 |
| b (Flange Thickness) | ~22 |
| z–φd (Bolt Holes) | 8 × φ23 |
| H (Height incl. gearbox) | ~450–500 |
| Do (Gearbox Width) | ~250–300 |
These dimensions follow GB/T 12221 and API 609 standards for wafer-type butterfly valves.
Application Areas:
Ideal for:
- Steam and condensate systems
- Petrochemical and chemical processing
- Power generation (including turbine bypass)
- HVAC and district heating networks
- Oil & gas pipelines
- High-temperature gas and air isolation
The triple-eccentric design eliminates friction between seat and disc during operation, minimizing wear and enabling tight shut-off even in high-cycle environments.
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