Deskripsi
WCB Flange Connection Wedge Gate Valve (Rising Stem)
Model : Z41H-25C DN100
Brand : Shanghai Valve Factory
Product Overview:
The Z41H-25C is a manual rising stem wedge gate valve with flanged ends, designed for high-pressure industrial applications. It features a rigid wedge gate and WCB (cast carbon steel) body, offering reliable shut-off performance in steam, oil, and water pipelines.
- Type: Wedge gate valve (rigid wedge, single gate)
- Stem: Rising stem (visible position indicator)
- Operation: Manual handwheel
- Connection: Flanged ends (PN25)
- Design Standard: GB/T 12234
Detailed Specifications (DN100, PN25):
| Parameter | Value |
|---|---|
| Nominal Diameter | DN100 (4″) |
| Nominal Pressure | PN25 (2.5 MPa) |
| Test Pressure (Shell/Seal) | 3.8 MPa / 2.8 MPa |
| Temperature Range | ≤425°C (WCB body) |
| Flow Direction | Bidirectional |
| Leakage Class | GB/T 13927 (tight shut-off) |
| Face-to-Face Length | ~230 mm |
| Flange Standard | JB/T 79-94 / GB/T 9113 |
Material List:
| Component | Material |
|---|---|
| Body / Bonnet | WCB (Cast Carbon Steel) |
| Gate Disc | WCB with hard alloy sealing |
| Stem | 2Cr13 Stainless Steel |
| Seat Ring | 25Cr2MoV / Stellite overlay |
| Packing | Reinforced Flexible Graphite |
| Gasket | Graphite + SS304 spiral wound |
| Stem Nut | ZCuAl10Fe3 (Bronze Alloy) |
| Handwheel | Cast Iron |
The sealing surfaces are typically hard-faced with Stellite or equivalent cobalt-based alloys for wear and corrosion resistance.
Drawing Dimensions (DN100, PN25):
| Dimension | Value (mm) |
|---|---|
| L (Face-to-Face) | 230 |
| D (Flange OD) | 235 |
| D1 (Bolt Circle) | 190 |
| D2 (Bore) | 158 |
| b (Flange Thickness) | 24 |
| f (Raised Face) | 3 |
| z–φd (Bolt Holes) | 8 × φ23 |
| H (Height Open) | ~600–650 |
| Do (Handwheel Dia) | ~300 |
These dimensions follow JB/T 79-94 and GB/T 12221 standards.
Application Areas:
This valve is widely used in:
- Steam and condensate systems
- Oil and gas pipelines
- Chemical and petrochemical plants
- Thermal power stations
- Industrial water supply and drainage
- High-temperature and high-pressure fluid isolation
Its rigid wedge design ensures tight shut-off even under thermal expansion, and the rising stem provides clear visual indication of valve position.
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