Deskripsi
1CR5MO Flange Connection Straight-Through Stop Valve with Bevel Gear
Model : J541Y-25I DN250
Brand : Shanghai Valve Factory
Product Overview
The J541Y-25I is a straight-through globe (stop) valve designed for isolation in high-temperature and high-pressure pipelines. It features a bevel gear actuator for reduced manual torque and precise control. The valve body is made from 1Cr5Mo, a chromium-molybdenum alloy steel suitable for steam, superheated water, and corrosive gases in power stations and petrochemical plants.
- Type: Globe valve (stop valve), straight-through flow
- Model: J541Y-25I
- Size: DN250 (NPS 10″)
- Pressure Class: PN25 (2.5 MPa)
- Connection: Flanged ends
- Operation: Bevel gear (manual gearbox)
- Design Standard: GB/T 12235
- Application Standard: GB/T 13927 / JB/T 9092
Specifications (DN250, PN25)
| Parameter | Value |
|---|---|
| Nominal Diameter | DN250 |
| Nominal Pressure | PN25 (2.5 MPa) |
| Test Pressure (Shell/Seal) | 3.8 MPa / 2.8 MPa |
| Temperature Range | –29°C to +600°C |
| Flow Direction | Straight-through |
| Leakage Class | Class IV or better |
| Face-to-Face Length | ~650 mm |
| Flange Standard | GB/T 9113 / JB/T 79 |
| End-to-End Standard | GB/T 12221 |
Material List
| Component | Material |
|---|---|
| Body / Bonnet | 1Cr5Mo (Chrome-Moly Alloy Steel) |
| Disc | 1Cr5Mo + Stellite overlay |
| Seat Ring | 1Cr5Mo / SS304 / Stellite |
| Stem | SS304 / SS316 |
| Packing | Flexible Graphite |
| Gasket | Graphite + SS304 spiral wound |
| Gearbox Housing | Cast Iron / Carbon Steel |
| Fasteners | Alloy Steel / Stainless Steel |
The Stellite hard-facing on sealing surfaces ensures durability under thermal cycling and erosion.
Dimensions (DN250, PN25)
| Dimension | Value (mm) |
|---|---|
| L (Face-to-Face) | ~650 |
| D (Flange OD) | ~405 |
| D1 (Bolt Circle) | ~355 |
| D2 (Bore) | ~305 |
| b (Flange Thickness) | ~30 |
| z–φd (Bolt Holes) | 12 × φ30 |
| H (Height incl. gearbox) | ~1100–1250 |
| Gearbox Width | ~350–400 |
These dimensions follow GB/T 12221 and JB/T 79 standards for PN25 flanged valves.
Application Areas
This valve is ideal for:
- Thermal power stations (main steam lines, reheaters)
- Petrochemical and refinery units
- High-temperature water and steam isolation
- Superheated gas and vapor systems
- Boiler feedwater and blowdown lines
- Industrial process control in corrosive environments
The 1Cr5Mo alloy provides excellent resistance to oxidation, creep, and thermal fatigue, making it suitable for long-term service in elevated temperature conditions.
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