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Knife Gate Valve 250mm Class 300 Hydraulic Actuated
Industrial knife gate valve for medium-pressure applications. Features hydraulic actuation, CS GR.460 body construction, and SS304 stainless steel internals. Ideal for slurry, pulp, and wastewater applications.
Key Specifications
- Size: 250mm (10 inch) NB
- Pressure Class: ASME 300 (Class 300)
- Actuation: Hydraulic
- End Connection: Flanged as per ASME B16.5
Design Standards
- Specification: MD-101-SMEM-EG-PI-SPC-0004
- Flange Standard: ASME B16.5
- Testing: API 598 / BS 6755 Part-I
Salient Features
- Hydraulic actuated for automated control
- Class 300 rating for medium-pressure service
- SS304 gate disc for corrosion resistance
- Knife-edge design cuts through slurries
- ASME B16.5 flanged connections
- Robust CS GR.460 body construction
- Full bore design for minimal pressure drop
- Bi-directional sealing capability
Materials of Construction (MOC)
| Sr. No. | Component | Material | Specification |
|---|---|---|---|
| 01 | Body | Carbon Steel GR.460 | High strength structural steel |
| 02 | Gate Disc | SS 304 | ASTM A240 Type 304 |
| 03 | Spindle | SS 304 | ASTM A276 Type 304 |
| 04 | Carrier | Carbon Steel GR.460 | High strength structural steel |
| 05 | Bonnet | Carbon Steel GR.460 | High strength structural steel |
| 06 | Connecting Flanges | Forged Steel | ASTM A105 |
| 07 | Packing | Graphite | Braided graphite rings |
| 08 | Bolting | Alloy Steel | ASTM A193 Gr.B7 / A194 Gr.2H |
| 09 | Hydraulic Actuator | Steel/Aluminum | As per manufacturer standard |
Dimensions (Class 300 - ASME B16.5)
| Parameter | Value | Unit |
|---|---|---|
| Nominal Size | 250 | mm (10 inch) |
| Face to Face (Short Pattern) | 267 | mm |
| Flange OD | 444.5 | mm |
| Bolt Circle Diameter (PCD) | 387.4 | mm |
| Number of Bolts | 16 | nos |
| Bolt Hole Diameter | 28.6 | mm |
| Flange Thickness | 47.5 | mm |
| Raised Face Height | 1.5 | mm |
| Bore ID | 254.5 | mm |
Dimensions as per ASME B16.5 Class 300. Tolerance: ±3mm. Custom dimensions available on request.
Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Type | Knife Gate Valve |
| Size | 250mm (10 inch) NB |
| Pressure Rating | ASME Class 300 (PN 50) |
| Design Pressure | 51 bar @ 38°C |
| Temperature Range | -29°C to +425°C |
| End Connection | Flanged (RF) as per ASME B16.5 |
| Operation | Hydraulic Actuator |
| Flow Characteristic | Full Bore, Bi-directional |
| Seat Type | Metal to Metal |
| Leakage Class | Class IV (Metal Seated) |
| Testing Standard | API 598 / BS 6755 Part-I |
Test Pressure
| Test Type | Pressure (bar) | Pressure (PSI) | Medium |
|---|---|---|---|
| Shell / Body Test (Hydrostatic) | 76.5 | 1110 | Water |
| Seat Test (Hydrostatic) | 56 | 814 | Water |
| Seat Test (Pneumatic) | 7 | 100 | Air |
Applications
- Mining & Mineral Processing
- Slurry Handling Systems
- Wastewater Treatment
- Power Generation
- Pulp & Paper Industry
- Cement Plants
Frequently Asked Questions
What is the pressure rating of the 250mm Class 300 Knife Gate Valve?
This Knife Gate Valve is rated for ASME Class 300, suitable for applications up to 740 PSI (51 bar) at ambient temperature.
What is the difference between Class 300 and Class 600 Knife Gate Valves?
Class 300 valves have a lower pressure rating (51 bar vs 102 bar) and thinner flanges, making them suitable for medium-pressure applications while Class 600 is for high-pressure service.
Can this valve handle abrasive media?
Yes, the knife-edge gate design and SS304 construction make it ideal for handling abrasive slurries, powders, and fibrous materials common in mining and pulp applications.
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